NATIONAL ELECTRICAL CODE CODE-MAKING PANEL 14 NFPA 70 Second Draft … · 2018. 10. 18. · 10) List all Public Inputs or First Revisions related to combustibles in plenums or other

NATIONAL ELECTRICAL CODE® CODE-MAKING PANEL 14

NFPA 70 Second Draft Meeting Agenda

October 29 – November 3, 2018 San Diego, CA

1. Call to Order – Michael Smith, Chair

2. Introductions

3. Approval of Previous Meeting Minutes (Attachment A)

4. Staff Updates - NFPA Staff

• Overview of NFPA Process

5. Review of Public Comments (Attachment B)

6. Old Business

7. New Business

8. Adjourn

Code-Making Panel 14 Second Draft Meeting Agenda October 29 - November 3, 2018

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Attachment A: Previous Meeting Minutes


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Chairman’s Report for the TC on __NEC – CMP-14________________________________

Signature:___Michael W. Smith_______________ __DATE: February 12, 2018

1) Date(s) and location of meeting: January 7th through 10th,

2018 @ Sonesta Resort, Hilton Head, SC

2) List names of guests in attendance: (See Attendance Sheet)

3) List names of guests addressing the Panel/TC, the subject of their address, and the length

of time they spoke: Gary Savage w/ Drake Oil & Gas:

PIs 3314 and 3320 pertaining to requested changes in Articles 501 and 505 with respect

to the expansion of the allowed usage of Type TC-ER_HL cables in Class I Division 1

and Zone 1 hazardous locations.

3) Number of Pubic Inputs acted upon: 191

4) Number of First Revisions created: 79

5) List any Task Groups appointed to work subsequent to the First Draft Meeting, along

with the names of members of the Task Group(s):

Task Group 1- Global & Definitions

John Simmons Chair L

Cahill Corey E

Reith Lowwell IM

Schnaare Ted M

Kelly Paul RT

Arron Michael SE

Hernandez Andrew U

Wirfs Mark U


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Task Group 2- Article #501

Don Ankele Chair RT

Ramirez Eddie I

Cole Cory IM

Dunne Thomas L

Holub Richard U

Neagle Jeremy U

Levi Arkady UT

Chrysler Mark E

Task Group 3-Articles 502,503,504,506

Evans Massey Chair M

Chrysler Mark E

Fiske Bill RT

Burns Dave U

Dunne Thomas L

Goodman Mark U

Ankele Don RT

Cole Cory IM

Task Group 4 - Article #505

Richard Holub Chair U

Lawrence William I

Blais Steven M

Pope Tim RT

Wechsler David U

Alexander Harold UT

Kines Haywood E

Massey Evans M

Simmons John L

Task Group 5 - Article #511, 513, 514, 515 & 516

Mark Goodman Chair U

Trapp Steven IM

Leubner Edmund M

McBride William U

Ankele Donald RT

Kines Haywood E

Cahill Corey E


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6) List any request contained in a Responses or Statement that require NEC Correlating

Committee attention:

a) The TCCshould consider taking action in Article 506.17(B) and 506.17 based

on FR7632 and FR7858.

b) The TCC needs to correlate action taken on FR7789 and verify in other articles,

like Articles 501, 502, 503, 504, 506, 511, 512, 513, 514, 515, and 516 so that

“Class I” is properly eliminated when referring to Zone 0, 1, and 2 locations as

was done in Article 505 by action on FR7789.

c) The TCC should consider correlation activity on Article 506.15 with actions

taken on FR7840, especially as it relates to flexible connections.

7) List any Public Inputs or First Revisions, in your opinion, that needs to be referred to

another TC for information or correlation:

a) Standard for Combustible Metals, NFPA 484, does NOT eschew Article 506 or Zone 20, 21, 22 classifications.

b) A cross-panel task group to to correlate language among the Standards

mentioned should be recommended (NEC®, NFPA 61, NFPA 484, NFPA 499,

NFPA 652, NFPA 654, and NFPA 664). With these documents in different

revision cycles, I think the task group needs to come up with TIAs appropriate

to each document and use this to align the documents until the next time they

each come up for their normal revisions. That said, we’re going to need to

understand the boundaries – that is, what each panel contributes to the issue.

Who defines the terms, who sets the area classification boundaries, who

determines what equipment may be used in the hazardous (classified) area, etc.

I don’t think we can have language in another standard like NFPA 652 that says

“don’t do area classification that way – do it this way” as the Electrical

Inspectors are inspecting electrical installations to the NEC®

9) List any Public Inputs or First Revisions that should be referred to the Toxicity Advisory

Committee: N/A

10) List all Public Inputs or First Revisions related to combustibles in plenums or other air

handling spaces: N/A

11) Identify any issues that should be brought to the attention of the NFPA Research

Foundation for their input and assistance: N/A


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12) List any general requests for information or assistance from the NEC Correlating

Committee: N/A

13) Provide any additional information that you feel would be helpful to the NEC

Correlating Committee, staff, or to the process in general: N/A


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Code-Making Panel 14 Attendance

NEC® First Draft Meeting A2019

Principal Members in Attendance

M. Smith, Chair E. Massey M. Wirfs D. Ankele W. McBride J. Simmons S. Blais J. Neagle W. Lawrence W. Fiske T. Pottschmidt L. Reith M. Goodman

Alternate Members in Attendance

C. Cole P. Kelly T. Schnaare T. Dunne H. Kines M. Temple Hernandez, A. E. Leubner R. Holub E. Ramirez

Staff Liaison

L. Moreno, NFPA M. Earley, NFPA

Guests in Attendance

S. Trapp, NECA M. Johnston, NECA D. Hittinger, IEC C. Dubay, NFPA D. Hittinger, IEC J. Burris, STI G. Savage, Prysmian Group P. Hickman, IBEW R. Roux, NFPA G. Fuentes, STI B. Holland, NEMA


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Attachment B: Public Comment Report


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Public Comment No. 683-NFPA 70-2018 [ Global Input ]

Type your content here ...{strikethrough}physical{/strikethrough} damage

Statement of Problem and Substantiation for Public Comment

I have to respectfully disagree with the concept that the term, "Physical damage" is well understood. My basis for this is the fact that there have been many, many attempts to define the term based on the various understandings that experienced electricians and inspectors have. Based on the committee's response to PI 1781, it appears that removing the adjective will increase the consistency of interpretation of the rules that pertain to damage, while entailing no loss.

Related Item

• Based to committee statement in reponse to PI 1781

Submitter Information Verification

Submitter Full Name: David Shapiro

Organization: Safety First Electrical

Street Address:

City:

State:

Zip:

Submittal Date: Wed Aug 15 12:34:48 EDT 2018

Committee: NEC-AAC

Copyright Assignment

I, David Shapiro, hereby irrevocably grant and assign to the National Fire Protection Association (NFPA) all and full rights in copyright inthis Public Comment (including both the Proposed Change and the Statement of Problem and Substantiation). I understand and intend thatI acquire no rights, including rights as a joint author, in any publication of the NFPA in which this Public Comment in this or another similaror derivative form is used. I hereby warrant that I am the author of this Public Comment and that I have full power and authority to enterinto this copyright assignment.

By checking this box I affirm that I am David Shapiro, and I agree to be legally bound by the above Copyright Assignment and the termsand conditions contained therein. I understand and intend that, by checking this box, I am creating an electronic signature that will, uponmy submission of this form, have the same legal force and effect as a handwritten signature

National Fire Protection Association Report https://submittals.nfpa.org/TerraViewWeb/ContentFetcher?commentPar...

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This Global Public Comment requests that each CMP review all products under their purview anddetermine whether reconditioning should be permitted. This public comment is submitted by a taskgroup assigned by the NEC Correlating Committee. This task group was charged with reviewing PublicInput 2935 which was resolved by CMP-1 during the first draft stage. This PI would have required that“Reconditioned Equipment” be “listed as “reconditioned” and the “original listing marks removed”. This PIhas ramifications that are global in nature and impacts all products referenced in the NEC under thepurview of every CMP.

Additional Proposed Changes

File Name Description Approved

NEMA-Position_Refubishing_on_ElecEquip.pdf


This Public Comment is submitted on behalf of a task group appointed by the NEC® Correlating Committee. This Task Group was appointed to review the use of refurbished equipment throughout the NEC®. Task Group members are Jim Dollard, Robert Osborne, Jim Pierce, and David Williams. This task group has been charged with reviewing Public Input (PI) 2935 which was resolved by CMP-1 during the first draft stage. This PI would have required that “Reconditioned Equipment” be “listed as “reconditioned” and the “original listing marks removed”. This PI has ramifications that are global in nature and impacts all products referenced in the NEC under the purview of every CMP.

Task group members noted that some types of equipment are capable of being reconditioned, then re-evaluated to ensure compliance with the applicable product standards. Other types of equipment do not lend themselves to reconditioning due to the complexity of the product, the manufacturing process, or the level of knowledge the company performing the reconditioning may need, etc.

The “NEMA Policy on Reconditioned Electrical Equipment” details the following aspects of Reconditioning of Electrical Equipment:

ꞏ Fundamental Tenets for Reconditioning Electrical Equipment

ꞏ Electrical Infrastructure and Worker Safety

ꞏ Integrity of Reconditioned Equipment

ꞏ Listing or Certification Marks

ꞏ UL Guidance on the UL Mark

ꞏ Components or Assemblies Not Suitable For Reconditioning (Appendix A)

ꞏ Components or Assemblies Which May Be Reconditioned (Appendix B)

A PDF copy of this NEMA policy is attached and may also be found on the internet at the following URL:

https://www.nema.org/Policy/Documents/NEMA-Position_Refubishing%20on%20ElecEquip.pdf

NEC® section 110.21(A)(2), which was new for the 2017 Edition of the NEC®, included marking requirements for “Reconditioned Equipment”. PI 2935 would have required that “Reconditioned Equipment” be “listed as “reconditioned” and the “original listing marks removed”. CMP 1 resolved this PI. Due to the global nature of PI 2935 this Task Group, appointed by the NEC® Correlating Committee, has developed a number of Public Comments, based on the products identified in the referenced NEMA document, to determine whether or not equipment can be reconditioned, and if reconditioned, what additional requirements apply.

While several Public Comments were developed for specific equipment by this task group, not all equipment was addressed (neither was all the equipment noted in the NEMA Policy document addressed). This Global Public


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Comment requests each CMP to review the products required to be listed under their purview and determine whether reconditioning should be permitted. It is recommended that the NEMA Policy document be used as one of the guidelines in making this determination. It is also recommended that one of the following options/examples be chosen for listed equipment:

Option 1 - Equipment NOT suitable for Reconditioning (EXAMPLE):

695.10 Listed Equipment. Diesel engine fire pump controllers, electric fire pump controllers, electric motors, fire pump power transfer switches, foam pump controllers, and limited service controllers shall be listed for fire pump service. [20:9.5.1.1, 10.1.2.1, 12.1.3.1]

Fire pump controllers and transfer switches shall not be permitted to be reconditioned.

Option 2 - Equipment which MAY BE suitable for Reconditioning (EXAMPLE):

408.8 Reconditioned Equipment.

(A) Panelboards. The use of reconditioned panelboards shall comply with (1) and (2):

(1) Industrial and commercial panelboards shall be permitted to be reconditioned. Reconditioned equipment shall be listed as “reconditioned” and the original listing mark removed.

(2) Panelboards installed in dwelling units shall not be permitted to be reconditioned.

(B) Switchboards and Switchgear. Low voltage switchgear, medium voltage switchgear and switchboards shall be permitted to be reconditioned. Reconditioned equipment shall be listed as “reconditioned” and the original listing mark removed.

Note that equipment where no specific guidance is provided would be permitted to be reconditioned and would only be required to meet the marking requirements in 110.21(A)(2).

Related Public Comments for This Document

Related Comment Relationship

Public Comment No. 980-NFPA 70-2018 [New Section after 240.87(B)]

Public Comment No. 981-NFPA 70-2018 [New Section after 240.61]

Public Comment No. 982-NFPA 70-2018 [New Section after 240.101(B)]

Public Comment No. 983-NFPA 70-2018 [Section No. 695.10]

Public Comment No. 984-NFPA 70-2018 [Section No. 700.5(C)]



Public Comment No. 987-NFPA 70-2018 [New Section after 408.7]

Related Item

• PI 2935


Submitter Full Name: James Dollard

Organization: IBEW Local Union 98

Street Address:

City:

State:


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Zip:

Submittal Date: Tue Aug 21 08:08:39 EDT 2018

Committee: NEC-AAC


I, James Dollard, hereby irrevocably grant and assign to the National Fire Protection Association (NFPA) all and full rights in copyright inthis Public Comment (including both the Proposed Change and the Statement of Problem and Substantiation). I understand and intend thatI acquire no rights, including rights as a joint author, in any publication of the NFPA in which this Public Comment in this or another similaror derivative form is used. I hereby warrant that I am the author of this Public Comment and that I have full power and authority to enterinto this copyright assignment.

By checking this box I affirm that I am James Dollard, and I agree to be legally bound by the above Copyright Assignment and the termsand conditions contained therein. I understand and intend that, by checking this box, I am creating an electronic signature that will, uponmy submission of this form, have the same legal force and effect as a handwritten signature


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NEMA Policy on Reconditioned Electrical Equipment

Executive Summary: The option of reconditioning existing equipment (instead of purchasing new equipment) exists today. Proper electrical equipment reconditioning provides a means to extend the life of electrical products as well as an opportunity in some cases to update installed equipment with the latest performance and safety features. However, not all components of the electrical infrastructure are candidates for reconditioning. There are a number of precautions that must be adhered to when reconditioning electrical equipment if that equipment is to operate safely and with acceptable performance. Those precautions are discussed below and include the use of design qualified parts, testing to industry-recognized safety standards, original manufacturer specification and/or recommendations, when possible, and reconditioning performed by qualified personnel. The integrity of reconditioned electrical equipment must be established by documenting and demonstrating that component replacement has not compromised the manufacturer’s original specifications and accepted industry standards. The third party certification mark must be removed or obliterated from reconditioned electrical products to indicate that an evaluation of the reconditioning process or reconditioned product has not been conducted by the original third party. As guidance, Appendix B provides a list of electrical products and components that are considered by NEMA suitable for reconditioning and Appendix A provides a list of electrical products considered not suitable for reconditioning. Medical Imaging Equipment is specifically not addressed by this policy (reference MITA 1, Good Refurbishment Practices for Medical Imaging Equipment). Introduction: The U.S. electrical industry includes discussions on implementing new technologies to enhance existing electrical infrastructure. Further, sustainability and safeguarding the environment are growing in importance. In the midst of this is the option for reconditioning existing equipment. Paramount in all this is the fundamental priority that all electrical systems operate while safe-guarding personnel and infrastructure from potential hazards (electrical, mechanical, fire, etc.). This forms the basis for the NEMA position on reconditioning electrical products. Given that electrical systems are diverse in design, function, and application, not all components of the electrical infrastructure are candidates for reconditioning. Definition:

Reconditioning: the process of restoring electromechanical systems, equipment, apparatus or components to operating conditions as recommended by the


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manufacturer’s instructions, using only design qualified parts. Reverse engineered parts (designs copied from existing parts by other manufacturers) are not considered to be “design qualified parts” unless specifically design verified under applicable Standards. Electrical industry practitioners and other organizations may also use the following terms/words to describe the process of reconditioning: remanufacturing, refurbishing, recycling, repairing, restoring, rebuilding, reengineering, and reusing.

In addition to design considerations, it is often impossible to obtain the service records, application environment, and operation parameters of all electrical components. Not having access to such information could have an adverse impact on the final safety and reliability of refurbished or reconditioned equipment. While NEMA supports the reconditioning of some electrical equipment, the components listed in Appendix A are not recommended for reconditioning, unless otherwise indicated by the original manufacturer. Normal servicing of equipment that remains within a facility should not be considered reconditioning or refurbishing. For electrical components suitable for reconditioning listed in Appendix B, the following fundamental tenets have been established. Fundamental Tenets for Reconditioning Electrical Equipment

Reconditioning electrical equipment may be a viable option for extending operational lifetime of equipment and enhancing equipment with additional features.

Electrical equipment reconditioning activity must be based on available guidance documentation from the Original Equipment Manufacturer, or industry-developed standards. Where any conflict in guidance is noted between the OEM and industry standards, the OEM guidance should take precedence.

Electrical equipment must be reconditioned and qualified to an industry-developed standard that ensures equipment is in a usable and safe operating condition. An industry-developed standard is a widely agreed upon rule, set of rules, procedures or requirements for a product, assembly or process which are developed by members or organizations of an aggregate of manufacturing and technically productive enterprises in a particular field. Products deemed to be candidates for reconditioning must be reconditioned and qualified to industry standards containing the most relevant and critical design aspects, testing criteria and manufacturing specifications when the item was built.

Reconditioning work must be performed by qualified personnel. Electrical equipment that has been exposed to adverse conditions, such as fire,

water damage, etc., may not be suitable for reconditioning. A comprehensive assessment of the electrical equipment being considered for

reconditioning with service records, application, environment, service life, and operating parameters is critical before deciding to pursue reconditioning of the electrical equipment and system. Trained, skilled technicians should be able to assess whether a device or system is suitable for reconditioning through physical inspection and test.

Appendix A provides guidance on which components or assemblies of the electrical system are not suitable for reconditioning because they may pose a


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hazard. Appendix B provides guidance on the components or assemblies are suitable for reconditioning.

Reconditioning electrical equipment must utilize electrical product safety standards as they contain design aspects, testing criteria and manufacturing specifications to ensure a given product will function as intended. These requirements are established to deliver a usable and safe operating condition as a key component of intended product functionality.

Electrical Infrastructure and Worker Safety

Electrical equipment that is properly installed, tested, maintained, and operated will provide reliable power as well as protect the electrical infrastructure. The reconditioning of electrical equipment requires the electrical industry, in collaboration with manufacturers, to establish performance specifications and accepted industry standards to help ensure safe and reliable equipment that help protect our electrical infrastructure so workers and users can continue to benefit from a safe and effective electrical system. Reconditioning standards must include prescriptive actions and performance requirements that result in equipment that complies with standards that include but are not limited to CSA, IEC, IEEE, NEC, OSHA, NFPA 70E, NFPA 70B, NETA ATS, NETA MTS, and EASA AR100 for example. Qualified personnel must possess the knowledge of how to assess equipment condition, potential hazards, and specifications to accurately determine the suitability for reconditioning. A safe and reliable electrical infrastructure that can be safely maintained is dependent on compliance with manufacturers’ instructions, qualified workers, proper maintenance, and accepted industry standards for reconditioning activities. Electrical Equipment Reliability, Performance and Safety

Proper electrical equipment reconditioning provides a means to extend the life of electrical products as well as an opportunity to update installed equipment with the latest performance and safety features. Establishing well defined guidelines for those performing the reconditioning activity, based on original manufacturer’s requirements, creates a solid foundation for the electrical industry and users. It is paramount that reconditioned electrical equipment be reliable in not only providing power, but also in safely performing its intended function as part of a safe operating electrical system. Understanding the environment, electrical load characteristics and historical maintenance performed on equipment being considered for reconditioning are all important parts of an assessment for reconditioning that can have a significant bearing on reliability, performance and safety. The electrical equipment manufacturer is the foremost authority on the design, performance and intended safe application of their product. Reconditioned electrical equipment must not compromise the reliability, performance, safe operation, or maintenance of the electrical system. Integrity of Reconditioned Equipment


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Reconditioned electrical equipment must comply with all applicable standards at the time the equipment was initially built as a minimum as well as the original manufacturer’s performance requirements in accordance with the nameplate markings and ratings. Replacement parts shall meet the design criteria (form, fit, and function) for the device to perform its intended function and provide safe operation. Replacement parts shall not include counterfeit parts (i.e., parts that have been misrepresented to be an authorized item of the legally authorized source.) Equipment shall operate safely in its intended application after reconditioning occurs. Care must be taken to ensure specific operations such as timing, sequencing, control, transfer, etc. continue to function in the manner originally intended, unless changes are specified during the reconditioning process. The integrity of reconditioned electrical equipment must be established by documenting and demonstrating that component replacement and performance changes have not compromised the manufacturer’s specifications and accepted industry standards. Listing or Certification Marks

NEMA members manufacture products that are more than likely to be evaluated as part of a third party certification program to nationally recognized safety standards. These products can be marked with a listing or certification mark when the products are manufactured and shipped from the factory. The organization that reconditions the product is responsible for adhering to the guidelines from the issuing agency authorizing the mark to determine if the mark can remain on the product after reconditioning. The organization that reconditions is responsible for any actions necessary for the mark to remain on the product (analysis, testing, etc.). Otherwise, reconditioned electrical products must have their mark removed or obliterated to indicate that an evaluation of the reconditioning process has not been conducted by the original third party. The organization that reconditions the product is additionally responsible for applying a mark or seal that indicates that the equipment has been reconditioned. This mark must provide traceability to the reconditioning organization in the event that it is necessary to determine the details of who reconditioned the equipment and the report on what was completed during this process. There are a number of NEMA products that are not allowed to be reconditioned due to the inherent safety characteristics and requirements for those products to be evaluated according to a regular follow up program to evaluate the safety performance requirements as a condition of maintaining the listing or certification mark. This process cannot be applied to reconditioned electrical products since these are normally destructive tests and sample sets of reconditioned products are not possible due to limited quantities or ratings of specific devices. UL Guidance on the UL Mark When the manufacturer places the UL Mark on the product at the factory, it is their attestation that the product complies with the applicable requirements. Unless there is further oversight or review/inspection (field inspection) UL cannot ascertain that the


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product continues to comply with all requirements should field repairs, modifications or component replacements be made to the product. Obviously there is little control over what manufacturers will or can do to equipment which left the factory with a certification mark. UL has created rebuilt categories where the reconditioning of product is done in an organized consistent manner under the supervision of UL’s FUS (Follow-Up Services) field representatives. In these cases the first action conducted with equipment being rebuilt is the removal of the initial certification mark (if provided). Upon completion of the reconditioning, in accordance with the surveillance document, the manufacturer is permitted to affix a mark which clearly identifies the product as reconditioned.

Cases where a reconditioner is instructed to NOT remove any certification mark will result in confusion. Clearly such equipment in the field, which has undergone modification or reconditioning, is ineligible to bear a mark which designates a compliance with a certification standard.


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APPENDIX A

COMPONENTS OR ASSEMBLIES NOT SUITABLE FOR RECONDITIONING* Adjustable speed drives Arc fault circuit breakers Ballasts Busway (mylar wrapped) Busway (powder coated) Cable tray Cast resin transformers Components containing semiconductors and transistors Control transformers Dry type transformers Electrical Connectors Electrical submetering equipment Electrical vehicle supply equipment Enclosed switches Fire detectors, smoke alarms, co detectors Fire pump controllers Flexible and extension cords Flexible conduit Ground fault circuit breakers High performance wire and cable Lighting controls Liquid filled transformers Low and medium voltage fuse holders Low and medium voltage non-renewable fuses Low voltage power circuit breaker electronic trip units Luminaires Meters (electromechanical, electronic or digital) Meter sockets Molded case circuit breakers Non-Metallic conduit, tubing, raceways and fittings Non-metallic surface raceways and fittings Outlet and junction boxes Overload relays Pin and sleeve plugs receptacles and connectors Power and control cable Protective relays (electronic or digital) Residential panel boards Solid state contactors and starters Solid state drives Strut type channel raceway Surface metal raceways and fittings Surge protective devices Transfer switches Wire or cable Wireway Wiring devices


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*The components or products listed above are not recommended for reconditioning, unless otherwise indicated by the original manufacturer.

APPENDIX B COMPONENTS OR ASSEMBLIES WHICH MAY BE RECONDITIONED Electromechanical protective relays, and current transformers High voltage circuit breakers Industrial and commercial panel boards Low and medium voltage power circuit breakers Low and medium voltage replaceable link fuses Low voltage switchgear Manual and magnetic controllers Medium voltage switchgear Metallic conduit, tubing, raceways and fittings Motor control centers Motors Switchboards Uninterruptible Power Supply Equipment


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The Correlating Committee directs Panel 14 to review all references to Article 310 under their purview.Article 310 has been divided into Article 310,

Conductors for General Wiring, and Article 311, Medium Voltage Conductors and Cables for usability andclarity. Panel 14 shall appoint a task group

to review all necessary references to verify their accuracy and submit Public Comments where necessary.This action instructs Panel 14 to

submit a Public Comment(s) within the time frame required in the NEC schedule.

This action shall be considered as a public comment.



CN_270.pdf CN_270


NOTE: This Public Comment appeared as CC Note No. 270 in the First Draft Report.

The Correlating Committee directs Panel 14 to review all references to Article 310 under their purview. Article 310 has been divided into Article 310,

Conductors for General Wiring, and Article 311, Medium Voltage Conductors and Cables for usability and clarity. Panel 14 shall appoint a task group

to review all necessary references to verify their accuracy and submit Public Comments where necessary. This action instructs Panel 14 to

submit a Public Comment(s) within the time frame required in the NEC schedule.


Related Item

• Correlating Committee Note No. 270


Submitter Full Name: CC on NEC-AAC

Organization: NEC Correlating Committee

Street Address:

City:

State:

Zip:

Submittal Date: Fri Sep 07 14:15:48 EDT 2018

Committee: NEC-P14


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I, CC on NEC-AAC, hereby irrevocably grant and assign to the National Fire Protection Association (NFPA) all and full rights in copyright inthis Public Comment (including both the Proposed Change and the Statement of Problem and Substantiation). I understand and intend thatI acquire no rights, including rights as a joint author, in any publication of the NFPA in which this Public Comment in this or another similaror derivative form is used. I hereby warrant that I am the author of this Public Comment and that I have full power and authority to enterinto this copyright assignment.

By checking this box I affirm that I am CC on NEC-AAC, and I agree to be legally bound by the above Copyright Assignment and theterms and conditions contained therein. I understand and intend that, by checking this box, I am creating an electronic signature that will,upon my submission of this form, have the same legal force and effect as a handwritten signature


2 of 196 9/14/2018, 10:17 AM


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Correlating Committee Note No. 270-NFPA 70-2018 [ Global Input ]


Submitter Full Name: Sarah CaldwellCommittee: Submittal Date: Fri May 11 17:54:55 EDT 2018

Committee Statement and Meeting Notes

Committee Statement:

The Correlating Committee directs all panels to review all references to Article 310 under their purview. Article 310 has been divided into Article 310, Conductors for General Wiring, and Article 311, Medium Voltage Conductors and Cables for usability and clarity. Each panel shall appoint a task group to review all necessary references to verify their accuracy and submit Public Comments where necessary. This action instructs the referenced panels to submit a Public Comment(s) within the time frame required in the NEC schedule.


Ballot Results

This item has passed ballot

12 Eligible Voters0 Not Returned

12 Affirmative All0 Affirmative with Comments0 Negative with Comments0 Abstention

Affirmative AllBrunssen, James E.

Dressman, Kevin L.

Hickman, Palmer L.

Hittinger, David L.

Holub, Richard A.

Johnston, Michael J.

Kovacik, John R.

Manche, Alan

McDaniel, Roger D.

Pierce, James F.

Saporita, Vincent J.

Williams, David A.

Page 1 of 1National Fire Protection Association Report

8/20/2018https://submittals.nfpa.org/TerraViewWeb/FormLaunch?id=/TerraView/Content/70-2017....


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The Correlating Committee directs Panel 14 to review all Articles, within their purview, that supplement ormodify (90.3) GFCI requirements in 210.8 for correlation, clarity, usability and standardized format. ACorrelating Committee Task Group will be appointed and will submit comments where necessary.




CN_152.pdf CN_152


NOTE: This Public Comment appeared as CC Note No. 152 in the First Draft Report.

The Correlating Committee directs Panel 14 to review all Articles, within their purview, that supplement or modify (90.3) GFCI requirements in 210.8 for correlation, clarity, usability and standardized format. A Correlating Committee Task Group will be appointed and will submit comments where necessary.


Related Item

• Correlating Committee Note No. 152




Street Address:

City:

State:

Zip:

Submittal Date: Fri Sep 07 15:03:25 EDT 2018

Committee: NEC-P14





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Submitter Full Name: Erik Hohengasser

Committee:

Submittal Date: Thu May 10 18:00:52 EDT 2018

Committee Statement

CommitteeStatement:

The Correlating Committee directs each panel to review all Articles, within their purview, thatsupplement or modify (90.3) GFCI requirements in 210.8 for correlation, clarity, usability andstandardized format. A Correlating Committee Task Group will be appointed and will submit commentswhere necessary.


Ballot Results


12 Eligible Voters

0 Not Returned

12 Affirmative All

0 Affirmative with Comments

0 Negative with Comments

0 Abstention

Affirmative All

Brunssen, James E.

Dressman, Kevin L.

Hickman, Palmer L.

Hittinger, David L.

Holub, Richard A.


Kovacik, John R.

Manche, Alan

McDaniel, Roger D.

Pierce, James F.


Williams, David A.

National Fire Protection Association Report https://submittals.nfpa.org/TerraViewWeb/FormLaunch?id=/TerraView/...

1 of 1 8/20/2018, 10:10 AM


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The Correlating Committee notes that the hazardous (classified) location uses or permissions to use TypeP cable are under the purview of CMP14 and are better located in Chapter 5 for usability. The CorrelatingCommittee directs CMP 6 to correlate uses permitted, as done in other cable assembly articles, for Type PCable in Chapter 5 locations.

This action will be considered as a Public Comment.



PC_792_794_795_796_Attachment_CN_1_-_Global.pdf 70_CN1


NOTE: This Public Comment appeared as CC Note No. 1 in the First Draft Report on First Revision No. 8036, and is also related to Public Input No. 4309. The Correlating Committee notes that the hazardous (classified) location uses or permissions to use Type P cable are under the purview of CMP14 and are better located in Chapter 5 for usability. The Correlating Committee directs CMP 6 to correlate uses permitted, as done in other cable assembly articles, for Type P Cable in Chapter 5 locations. This action will be considered as a Public Comment.

Related Item

• FR 8036




Street Address:

City:

State:

Zip:

Submittal Date: Mon Sep 10 11:02:56 EDT 2018

Committee: NEC-P14





4 of 196 9/14/2018, 10:17 AM


Page 25 of 262



Submitter Full Name: Sarah Caldwell

Committee:

Submittal Date: Wed May 09 11:01:37 EDT 2018


CommitteeStatement:

The Correlating Committee advises that article scope statements and article titles are the responsibilityof the correlating committee. The correlating committee accepts the scope statement and directs thatthe Article title be changed to “Type P Cable”.


The Correlating Committee directs the panel to reconsider the use of first level subdivisions in 337.24this section. Consider using two list item type format to meet the requirements of the NEC® StyleManual 2.1.5.1.


The Correlating Committee notes that the hazardous (classified) location uses or permissions to useType P cable are under the purview of CMP14 and are better located in Chapter 5 for usability. TheCorrelating Committee directs CMP 6 to correlate uses permitted, as done in other cable assemblyarticles, for Type P Cable in Chapter 5 locations.


It was the action of the Correlating Committee that this first revision be referred to Code-Making Panel10 for correlation of permitted wiring methods in Article 230.

This action will be considered as a public comment.

First Revision No. 8036-NFPA 70-2018 [Global Input]

Ballot Results


12 Eligible Voters

0 Not Returned

12 Affirmative All

0 Affirmative with Comments

0 Negative with Comments

0 Abstention

Affirmative All

Brunssen, James E.

Dressman, Kevin L.

Hickman, Palmer L.


1 of 2 8/17/2018, 3:24 PM


Page 26 of 262

Hittinger, David L.

Holub, Richard A.


Kovacik, John R.

Manche, Alan

McDaniel, Roger D.

Pierce, James F.


Williams, David A.


2 of 2 8/17/2018, 3:24 PM


Page 27 of 262

Public Comment No. 2127-NFPA 70-2018 [ Definition: Explosionproof Equipment. ]

Explosionproof Equipment.

Equipment enclosed in a case that is capable of withstanding an explosion of a specified gas or vapor thatmay occur within it and of preventing the ignition of a specified gas or vapor surrounding the enclosure bysparks, flashes, or explosion of the gas or vapor within, and that operates at such an external temperaturethat a surrounding flammable atmosphere will not be ignited thereby. (CMP-14)

Informational Note No. 1: For further information, see ANSI/UL 1203-2015, Explosion-Proof andDust-Ignition-Proof Electrical Equipment for Use in Hazardous (Classified) Locations.

Informational Note No. 2: Explosionproof enclosures are sometimes additionally marked Type 7 perin accordance with NEMA 250-2014, Enclosures for Electrical Equipment.


In the 2011 cycle, and after over 100 proposals and then over 100 public comments went back and forth across the entire NEC, it was pretty well settled that the word "per" was perfectly legitimate if used as a proposition, as in one of these per one of those. However, if it were used as slang for "in accordance with" it should be changed to the more formal usage. This comment does exactly that in the new informational note.

Related Item

• FR 7518


Submitter Full Name: Frederic Hartwell

Organization: Hartwell Electrical Services,

Affiliation: self

Street Address:

City:

State:

Zip:

Submittal Date: Thu Aug 30 19:38:20 EDT 2018

Committee: NEC-P14


I, Frederic Hartwell, hereby irrevocably grant and assign to the National Fire Protection Association (NFPA) all and full rights in copyright inthis Public Comment (including both the Proposed Change and the Statement of Problem and Substantiation). I understand and intend thatI acquire no rights, including rights as a joint author, in any publication of the NFPA in which this Public Comment in this or another similaror derivative form is used. I hereby warrant that I am the author of this Public Comment and that I have full power and authority to enterinto this copyright assignment.

By checking this box I affirm that I am Frederic Hartwell, and I agree to be legally bound by the above Copyright Assignment and theterms and conditions contained therein. I understand and intend that, by checking this box, I am creating an electronic signature that will,upon my submission of this form, have the same legal force and effect as a handwritten signature


5 of 196 9/14/2018, 10:17 AM


Page 28 of 262

Public Comment No. 1116-NFPA 70-2018 [ Definition: Unclassified Locations. ]

Unclassified Locations.

Locations determined to be neither Class I, Division 1; Class I, Division 2; Class I, Zone 0; Class I, Zone 1;Class I, Zone 2; Class II, Division 1; Class II, Division 2; Class III, Division 1; Class III, Division 2; Zone 20;Zone 21; Zone 22; nor any combination thereof.


FR 7789 removed the term 'Class I' in relation to Zone 0, 1, and 2 locations. It is retained in Article 505 as an optional marking for equipment and in titles of documents in Informational Notes until such documents are updated to reflect this. This action correlates with FR-7789 actions.

Related Item

• FR-7789


Submitter Full Name: Richard Holub

Organization: The DuPont Company, Inc.

Street Address:

City:

State:

Zip:


Committee: NEC-P14


I, Richard Holub, hereby irrevocably grant and assign to the National Fire Protection Association (NFPA) all and full rights in copyright inthis Public Comment (including both the Proposed Change and the Statement of Problem and Substantiation). I understand and intend thatI acquire no rights, including rights as a joint author, in any publication of the NFPA in which this Public Comment in this or another similaror derivative form is used. I hereby warrant that I am the author of this Public Comment and that I have full power and authority to enterinto this copyright assignment.

By checking this box I affirm that I am Richard Holub, and I agree to be legally bound by the above Copyright Assignment and the termsand conditions contained therein. I understand and intend that, by checking this box, I am creating an electronic signature that will, uponmy submission of this form, have the same legal force and effect as a handwritten signature


6 of 196 9/14/2018, 10:17 AM


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Public Comment No. 1932-NFPA 70-2018 [ New Definition after Definition: Associated

Nonincendive Fi... ]

Conductor, Line

An ungrounded conductor that is supplied from a single-phase or poly-phase system. Conductors that areconnected to a single, or split, transformer winding are line conductors.


Often, the Code will use "Phase or Line conductor." This has been the subject of much debate on forums and in classrooms. There are many ways to define them. A phase conductor is always a line conductor, but a line conductor is not always a phase conductor.



Public Comment No. 1935-NFPA 70-2018 [New Definition after Definition: AssociatedNonincendive Fi...]

Related Item

• 1822-NFPA 70-2017


Submitter Full Name: Eric Stromberg

Organization: Los Alamos National Laboratory

Affiliation: Self

Street Address:

City:

State:

Zip:


Committee: NEC-P14


I, Eric Stromberg, hereby irrevocably grant and assign to the National Fire Protection Association (NFPA) all and full rights in copyright inthis Public Comment (including both the Proposed Change and the Statement of Problem and Substantiation). I understand and intend thatI acquire no rights, including rights as a joint author, in any publication of the NFPA in which this Public Comment in this or another similaror derivative form is used. I hereby warrant that I am the author of this Public Comment and that I have full power and authority to enterinto this copyright assignment.

By checking this box I affirm that I am Eric Stromberg, and I agree to be legally bound by the above Copyright Assignment and the termsand conditions contained therein. I understand and intend that, by checking this box, I am creating an electronic signature that will, uponmy submission of this form, have the same legal force and effect as a handwritten signature


7 of 196 9/14/2018, 10:17 AM


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Public Comment No. 1935-NFPA 70-2018 [ New Definition after Definition: Associated

Nonincendive Fi... ]

Conductor, Phase

An ungrounded conductor that is supplied from a poly-phase system. Conductors that are connected towindings that are in time-displacement with each other are phase conductors.

informational note: A Phase conductor is always a Line conductor but a Line conductor is not always aPhase conductor.


Often, the Code will use "Phase or Line conductor." This has been the subject of much debate on forums and in classrooms. There are many ways to define them. A phase conductor is always a line conductor, but a line conductor is not always a phase conductor.



Public Comment No. 1932-NFPA 70-2018 [New Definition after Definition:Associated Nonincendive Fi...]

companiondefinitions

Related Item

• 1822-NFPA 70-2017


Submitter Full Name: Eric Stromberg


Affiliation: Self

Street Address:

City:

State:

Zip:


Committee: NEC-P14


I, Eric Stromberg, hereby irrevocably grant and assign to the National Fire Protection Association (NFPA) all and full rights in copyright inthis Public Comment (including both the Proposed Change and the Statement of Problem and Substantiation). I understand and intend thatI acquire no rights, including rights as a joint author, in any publication of the NFPA in which this Public Comment in this or another similaror derivative form is used. I hereby warrant that I am the author of this Public Comment and that I have full power and authority to enterinto this copyright assignment.

By checking this box I affirm that I am Eric Stromberg, and I agree to be legally bound by the above Copyright Assignment and the termsand conditions contained therein. I understand and intend that, by checking this box, I am creating an electronic signature that will, uponmy submission of this form, have the same legal force and effect as a handwritten signature


8 of 196 9/14/2018, 10:17 AM


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Public Comment No. 37-NFPA 70-2018 [ New Article after 100 ]

TITLE OF NEW CONTENT

Type your content here ... Ignitable Liquid. Any liquid or liquid mixture that will burn. A liquid willburn if it has a measurable fire point. Ignitable liquids include flammable liquids, combustible liquids,inflammable liquids, or any other term for a liquid that will burn.


The term "flammable oil" is currently used in Article 490.3 (A) with no definition and as a conflation of "flammable liquid" and "oil" it is a confusing term that could imply a liquid that is not intended and likely does not actually exist. Similarly, Articles 460.2 and 460.26 infer that capacitors might be filled with flammable liquids, which would be a very dangerous and potentially explosive device. Interestingly, Article 460.12 refers to capacitors filled with combustible liquid or nonflammable liquid, which is what dielectric fluids generally are. It is possible that FM has a copyright on the term "ignitable liquid" and it may be necessary to get their permission for its use. Articles 460.2 and 460.26 should also be revised.

Related Item

• Article 490.3 (A)


Submitter Full Name: William Wolfe


Street Address:

City:

State:

Zip:

Submittal Date: Tue Jun 26 19:36:46 EDT 2018

Committee: NEC-P14


I, William Wolfe, hereby irrevocably grant and assign to the National Fire Protection Association (NFPA) all and full rights incopyright in this Public Comment (including both the Proposed Change and the Statement of Problem and Substantiation). Iunderstand and intend that I acquire no rights, including rights as a joint author, in any publication of the NFPA in which thisPublic Comment in this or another similar or derivative form is used. I hereby warrant that I am the author of this Public Commentand that I have full power and authority to enter into this copyright assignment.

By checking this box I affirm that I am William Wolfe, and I agree to be legally bound by the above Copyright Assignment andthe terms and conditions contained therein. I understand and intend that, by checking this box, I am creating an electronicsignature that will, upon my submission of this form, have the same legal force and effect as a handwritten signature


1 of 1 9/25/2018, 3:56 PM


Page 32 of 262

Public Comment No. 1788-NFPA 70-2018 [ New Section after 500.4(B) ]

TITLE OF NEW CONTENT

Type your content here ...Please refer to Public Input No. 3841. If the Panel's position regarding theproposed informational note is that "the re-classification of a flammable's characteristics on the basis of anambient proximity must be part of NFPA 30 and its committee", then suggest the Panel draft aninformational note to that effect, complying with the style manual, of course. The addition of such a notewould help to create awareness, rather than confusion, of a potentially dangerous condition. Thisinformational note, or a version thereof, should be included in several sections in Chapter 5.


Please refer to Public Input No. 3841. The proposed informational note, or a version thereof, will bring awareness to a potentially dangerous condition.

Related Item

• Public Input No. 3841


Submitter Full Name: Peter Noval Jr

Organization: [ Not Specified ]

Affiliation: Self

Street Address:

City:

State:

Zip:


Committee: NEC-P14


I, Peter Noval Jr, hereby irrevocably grant and assign to the National Fire Protection Association (NFPA) all and full rights in copyright inthis Public Comment (including both the Proposed Change and the Statement of Problem and Substantiation). I understand and intend thatI acquire no rights, including rights as a joint author, in any publication of the NFPA in which this Public Comment in this or another similaror derivative form is used. I hereby warrant that I am the author of this Public Comment and that I have full power and authority to enterinto this copyright assignment.

By checking this box I affirm that I am Peter Noval Jr, and I agree to be legally bound by the above Copyright Assignment and the termsand conditions contained therein. I understand and intend that, by checking this box, I am creating an electronic signature that will, uponmy submission of this form, have the same legal force and effect as a handwritten signature


9 of 196 9/14/2018, 10:17 AM


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Public Comment No. 1053-NFPA 70-2018 [ Section No. 500.4(B) ]

(B) Reference Standards.

Important information relating to topics covered in Chapter 5 may be found in other publications.

Informational Note No. 1: Familiarity with the standards of the National Fire Protection Association(NFPA), the American Petroleum Institute (API), and the International Society of Automation (ISA),as well as relevant industrial experience, may be of use in the classification of various locations, thedetermination of adequate ventilation, and the protection against static electricity and lightninghazards.

Informational Note No. 2: For further information on the classification of locations, see NFPA30-2018, Flammable and Combustible Liquids Code; NFPA 32-2016, Standard for DrycleaningPlants; NFPA 33-2016, Standard for Spray Application Using Flammable or Combustible Materials;NFPA 34-2018, Standard for Dipping, Coating and Printing Processes Using Flammable orCombustible Liquids; NFPA 35-2016, Standard for the Manufacture of Organic Coatings;NFPA 36-2017, Standard for Solvent Extraction Plants; NFPA 45-2015, Standard on Fire Protectionfor Laboratories Using Chemicals; NFPA 55-2016, Compressed Gases and Cryogenic Fluids Code;NFPA 58-2017, Liquefied Petroleum Gas Code; NFPA 59-2018, Utility LP-Gas Plant Code; NFPA497-2017, Recommended Practice for the Classification of Flammable Liquids, Gases, or Vaporsand of Hazardous (Classified) Locations for Electrical Installations in Chemical Process Areas;NFPA 499-2017, Recommended Practice for the Classification of Combustible Dusts and ofHazardous (Classified) Locations for Electrical Installations in Chemical Process Areas; NFPA820-2016, Standard for Fire Protection in Wastewater Treatment and Collection Facilities; ANSI/APIRP 500-2012, Recommended Practice for Classification of Locations of Electrical Installations atPetroleum Facilities Classified as Class I, Division 1 and Division 2; ISA-12.10-1988, AreaClassification in Hazardous (Classified) Dust Locations.

Informational Note No. 3: For further information on protection against static electricity and lightninghazards in hazardous (classified) locations, see NFPA 77-2014, Recommended Practice on StaticElectricity; NFPA 780-2017, Standard for the Installation of Lightning Protection Systems; and APIRP 2003-2015, Protection Against Ignitions Arising Out of Static Lightning and Stray Currents.

Informational Note No. 4: For further information on ventilation, see NFPA 30-2018, Flammable andCombustible Liquids Code; and ANSI/API RP 500-2012, Recommended Practice for Classificationof Locations for Electrical Installations at Petroleum Facilities Classified as Class I, Division 1 andDivision 2.

Informational Note No. 5: For further information on electrical systems for hazardous (classified)locations on offshore oil- and gas-producing platforms, drilling rigs, and workover rigs, seeANSI/API RP 14F-2013, Recommended Practice for Design and Installation of Electrical Systemsfor Fixed and Floating Offshore Petroleum Facilities for Unclassified and Class I, Division 1 andDivision 2 Locations.

Informational Note No. 6: Portable or transportable equipment having self-contained powersupplies, such as battery-operated equipment, could potentially become an ignition source inhazardous (classified) locations. See ANSI/UL 121203-2011, Standard for Portable ElectronicProducts Suitable for Use in Class I and II, Division 2, Class I Zone 2 and Class III, Division 1 and 2Hazardous (Classified) Locations.

Informational Note No. 7: For information on electrical resistance trace heating for hazardous(classified) locations, see ANSI/UL 60079-30-1-2017, Explosive Atmospheres — ElectricalResistance Trace Heating — General and Testing Requirements, and ANSI/IEEE 60079-30-2-2015,IEEE/IEC International Standard for Explosive atmospheres — Part 30-2: Electrical resistance traceheating — Application guide for design, installation, and maintenance.

Informational Note No. 8: For information on electric skin effect trace heating for hazardous(classified) locations, see ANSI/IEEE 844.1/CSA C22.2 No. 293.1-2017, Standard for Skin EffectTrace Heating of Pipelines, Vessels, Equipment, and Structures — General, Testing, Marking, andDocumentation Requirements, and IEEE 844.2-2017/CSA C293.2-17, Skin Effect Trace Heating ofPipelines, Vessels, Equipment, and Structures — Application Guide for Design, Installation, Testing,Commissioning, and Maintenance.



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CN_87.pdf 70_CN87


NOTE: This Public Comment appeared as CC Note No. 87 in the First Draft Report on First Revision No. 7851.

The Correlating Committee directs that this First Revision be reviewed for compliance of section 1.3 and 3.1.3 of the NEC Style Manual. Section 500.4(B) shall be written in Code language using mandatory terms. The informational notes contained within this section shall follow the rule to which they apply. It is unclear the rules to which Informational Note 1 through 8 apply.This action will be considered as a Public Comment.

Related Item

• First Revision No. 7851




Street Address:

City:

State:

Zip:


Committee: NEC-P14





11 of 196 9/14/2018, 10:17 AM


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8/21/2018 National Fire Protection Association Report

https://submittals.nfpa.org/TerraViewWeb/ViewerPage.jsp 1/1

Correlating Committee Note No. 87-NFPA 70-2018 [ Section No. 500.4(B) ]


Submitter Full Name: Sarah CaldwellCommittee:Submittal Date: Thu May 10 10:58:13 EDT 2018


CommitteeStatement:

The Correlating Committee directs that this First Revision be reviewed for compliance ofsection 1.3 and 3.1.3 of the NEC Style Manual. Section 500.4(B) shall be written in Codelanguage using mandatory terms. The informational notes contained within this section shallfollow the rule to which they apply. It is unclear the rules to which Informational Note 1 through8 apply. This action will be considered as a Public Comment.

First Revision No. 7851-NFPA 70-2018 Section No. 500.4(B)

Ballot Results





Dressman, Kevin L.

Hickman, Palmer L.

Hittinger, David L.

Holub, Richard A.


Kovacik, John R.

Manche, Alan

McDaniel, Roger D.

Pierce, James F.


Williams, David A.


Page 36 of 262

Public Comment No. 79-NFPA 70-2018 [ Section No. 500.5(A) ]

(A) General.

Locations shall be classified depending on the properties of the flammable gas, flammable liquid–producedvapor, combustible liquid–produced vapors, combustible dusts, or fibers/flyings that could be present, andthe likelihood that a flammable or combustible concentration or quantity is present. Each room, section, orarea shall be considered individually in determining its classification. Where pyrophoric materials are theonly materials used or handled, these locations are outside the scope of this article.

Informational Note: Through the exercise of ingenuity in the layout of electrical installations forhazardous (classified) locations, it is frequently possible to locate much of the equipment in areduced level of classification or in an unclassified location and, thus, to reduce the amount ofspecial equipment required.

Refrigerant machinery rooms that contain ammonia refrigeration systems and are equipped with adequatemechanical ventilation that operates continuously or is initiated by a detection system at a concentration notexceeding 150 ppm shall be permitted to be classified as “unclassified” locations.

Informational Note: For further information regarding classification and ventilation of areas involvingclosed-circuit ammonia refrigeration systems, see ANSI/ASHRAE 15-2016, Safety Standard forRefrigeration Systems , and ANSI/ IIAR 2-2014, Standard for Safe Design of Closed-CircuitAmmonia Refrigeration Systems.


As of Addendum A to the 2016 edition of ASHRAE 15, ASHRAE 15 no longer includes requirements for ammonia refrigeration. It now defers to IIAR 2, which is the recognized ANSI standard for ammonia refrigeration and addresses electrical classification of areas with ammonia refrigeration systems.



Public Comment No. 80-NFPA 70-2018 [Section No. 505.5(A)]


Related Item

• FR7506


Submitter Full Name: Jeffrey Shapiro

Organization: International Code Consultants

Affiliation: International Institute of Ammonia Refrigeration

Street Address:

City:

State:

Zip:

Submittal Date: Thu Jun 28 00:03:15 EDT 2018

Committee: NEC-P14


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Page 37 of 262


I, Jeffrey Shapiro, hereby irrevocably grant and assign to the National Fire Protection Association (NFPA) all and full rights in copyright inthis Public Comment (including both the Proposed Change and the Statement of Problem and Substantiation). I understand and intend thatI acquire no rights, including rights as a joint author, in any publication of the NFPA in which this Public Comment in this or another similaror derivative form is used. I hereby warrant that I am the author of this Public Comment and that I have full power and authority to enterinto this copyright assignment.

By checking this box I affirm that I am Jeffrey Shapiro, and I agree to be legally bound by the above Copyright Assignment and theterms and conditions contained therein. I understand and intend that, by checking this box, I am creating an electronic signature that will,upon my submission of this form, have the same legal force and effect as a handwritten signature


13 of 196 9/14/2018, 10:17 AM


Page 38 of 262

Public Comment No. 266-NFPA 70-2018 [ Section No. 500.5(D) [Excluding any Sub-

Sections] ]

Class III locations are those that are hazardous because of the presence of easily ignitible fibers or wherematerials producing combustible flyings are handled, manufactured, or used, but in which such fibers/flyingsare not likely to be in suspension in the air in quantities sufficient to produce ignitible mixtures. Class IIIlocations shall include those specified in 500.5(D)(1) and (D)(2). Classified locations where ignitiblefibers/flyings are likely to be in suspension in air shall be considered Class II environments with theappropriate material group, and utilize the wiring methods and equipment permitted by Article 502.


Class III locations currently include those in which fibers/flyings are “not likely to be in suspension in air…”, but no direction is currently given as to what classification should be if the fibers/flyings are likely to be in suspension in air. As a result, the various NFPA Dust Standards and Recommended Practices have all taken different approaches. This proposed language affirms that when the fibers/flyings are likely to be in suspension in air, then electrical classification and equipment shall follow the more stringent and developed requirements for dust classified locations in accordance with Article 502.

This proposal is in response to the direction from the Standards Council (see Standards Council Decision 18-4-26) to coordinate definitions, requirements, and scopes of NFPA 70® (Article 506), NFPA 652, NFPA 484, and NFPA 499. The proposed language comes from the NEC® and Dust Correlating Task Group work, and has representation from members of the NEC® and Dust Correlating committees, as well as members of various dust documents (e.g. NFPA 61, NFPA 652, and NFPA 484) and members of the Technical Committee on Electrical Equipment in Chemical Atmospheres.



Public Comment No. 267-NFPA 70-2018 [Section No. 500.6(B)]

Related Item

• FR-7522




Affiliation: Dust Task Group (Standards Council Decision 18-4-26)

Street Address:

City:

State:

Zip:

Submittal Date: Mon Jul 23 12:21:22 EDT 2018

Committee: NEC-P14





14 of 196 9/14/2018, 10:17 AM


Page 39 of 262

Public Comment No. 6-NFPA 70-2018 [ Section No. 500.6(A)(2) ]

(2) Group B.

Flammable gas, flammable liquid–produced vapor, or combustible liquid–produced vapor mixed with air thatmay burn or explode, having either a maximum experimental safe gap (MESG) value less than or equal to0.45 mm or a minimum igniting current ratio (MIC ratio) less than or equal to 0.40. [497:3.3.5.1.2]

Informational Note: A typical Class I, Group B material is hydrogen.

Exception No. 1: Group D equipment shall be permitted to be used for atmospheres containing butadiene,provided all :

a. All conduit runs into explosionproof equipment are provided with explosionproof seals installedwithin 450 mm (18 in.) of the enclosure , or

b . The equipment is identified for Group D and uses a protection technique other thanexplosionproof equipment.

Exception No. 2: Group C equipment shall be permitted to be used for atmospheres containing allylglycidyl ether, n-butyl glycidyl ether, ethylene oxide, propylene oxide, and acrolein, provided all :

a. All conduit runs into explosionproof equipment are provided with explosionproof seals installedwithin 450 mm (18 in.) of the enclosure , or

b . The equipment is identified for Group C and uses a protection technique other thanexplosionproof equipment.


When asked for an official interpretation of the exceptions listed in 500.6(A)(2), NFPA's official position is that these exceptions are intended only for explosionproof equipment. This omits the ability to use an Intrinsically safe or Non-Incendive Field Wiring Apparatus identified as Group C in these environments even though it is incapable of spark igniting the material(s).

Related Item

• PI


Submitter Full Name: William Miller

Organization: Mettler Toledo

Street Address:

City:

State:

Zip:

Submittal Date: Mon Jun 25 14:26:13 EDT 2018

Committee: NEC-P14


I, William Miller, hereby irrevocably grant and assign to the National Fire Protection Association (NFPA) all and full rights in copyright in thisPublic Comment (including both the Proposed Change and the Statement of Problem and Substantiation). I understand and intend that Iacquire no rights, including rights as a joint author, in any publication of the NFPA in which this Public Comment in this or another similar orderivative form is used. I hereby warrant that I am the author of this Public Comment and that I have full power and authority to enter intothis copyright assignment.

By checking this box I affirm that I am William Miller, and I agree to be legally bound by the above Copyright Assignment and the termsand conditions contained therein. I understand and intend that, by checking this box, I am creating an electronic signature that will, uponmy submission of this form, have the same legal force and effect as a handwritten signature


15 of 196 9/14/2018, 10:17 AM


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(B) Class II Group Classifications.

Class II groups shall be in accordance with 500.6(B)(1) through (B)(3).

(1) Group E.

Atmospheres containing combustible metal dusts or ignitible metal fibers/flyings that are likely to be insuspension , including aluminum, magnesium, and their commercial alloys, or other combustible dustswhose particle size, abrasiveness, and conductivity present similar hazards in the use of electricalequipment. [ 499: 3.3.4.1]

Informational Note: Certain metal dusts may have characteristics that require safeguards beyondthose required for atmospheres containing the dusts of aluminum, magnesium, and their commercialalloys. For example, zirconium, thorium, and uranium dusts have extremely low ignitiontemperatures [as low as 20°C (68°F)] and minimum ignition energies lower than any materialclassified in any of the Class I or Class II groups.

(2) Group F.

Atmospheres containing combustible carbonaceous dusts or ignitible carbonaceous fibers/flyings that arelikely to be in suspension that have more than 8 percent total entrapped volatiles (see ASTM D3175-2017,Standard Test Method for Volatile Matter in the Analysis Sample of Coal and Coke, for coal and coke dusts)or that have been sensitized by other materials so that they present an explosion hazard. [ 499: 3.3.4.2] Coal, carbon black, charcoal, and coke dusts are examples of carbonaceous dusts. [499:A.3.3.4.2]

Informational Note: Testing of specific dust samples, following established ASTM testing procedures,is a method used to identify the combustibility of a specific dust and the need to classify thoselocations containing that material as Group F.

(3) Group G.

Atmospheres containing combustible dusts or ignitible fibers/flyings that are likely to be in suspension notincluded in Group E or Group F, including flour, grain, wood, plastic, and chemicals. [ 499: 3.3.4.3]

Informational Note No. 1: For additional information on group classification of Class II materials, seeNFPA 499-2017, Recommended Practice for the Classification of Combustible Dusts and ofHazardous (Classified) Locations for Electrical Installations in Chemical Process Areas.

Informational Note No. 2: The explosion characteristics of air mixtures of dust vary with the materialsinvolved. For Class II locations, Groups E, F, and G, the classification involves the tightness of thejoints of assembly and shaft openings to prevent the entrance of dust in the dust-ignitionproofenclosure, the blanketing effect of layers of dust on the equipment that may cause overheating, andthe ignition temperature of the dust. It is necessary, therefore, that equipment be identified not onlyfor the class but also for the specific group of dust that will be present.

Informational Note No. 3: Certain dusts may require additional precautions due to chemicalphenomena that can result in the generation of ignitible gases. See ANSI/IEEE C2-2017, NationalElectrical Safety Code, Section 127A, Coal Handling Areas.


Class III locations currently include those in which fibers/flyings are “not likely to be in suspension in air…”, but no direction is currently given as to what classification should be if the fibers/flyings are likely to be in suspension in air. As a result, the various NFPA Dust Standards and Recommended Practices have all taken different approaches. This proposed language affirms that when the fibers/flyings are likely to be in suspension in air, then electrical classification and equipment shall follow the more stringent and developed requirements for dust classified locations in accordance with Article 502. Doing so, requires us to change the group definitions found here so that in addition to the traditional “dusts” previously included in these groups, fibers/flyings that are likely to be present in suspension are included in their respective groups. As these groups are no longer "extracts" from NFPA 499, until the Recommended Practice can be updated to match, we're suggesting removal of the Extract links, accordingly.

This proposal is in response to the direction from the Standards Council (see Standards Council Decision18-4-26) to coordinate definitions, requirements, and scopes of NFPA 70® (Article 506), NFPA 652, NFPA 484, and NFPA 499. The proposed language comes from the NEC® and Dust Correlating Task Group work, and has


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representation from members of the NEC® and Dust Correlating committees, as well as members of various dust documents (e.g. NFPA 61, NFPA 652, and NFPA 484) and members of the Technical Committee on Electrical Equipment in Chemical Atmospheres.



Public Comment No. 266-NFPA 70-2018 [Section No. 500.5(D) [Excluding any Sub-Sections]]


Related Item

• FR-7510





Street Address:

City:

State:

Zip:


Committee: NEC-P14





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Public Comment No. 1052-NFPA 70-2018 [ Section No. 500.7 [Excluding any Sub-

Sections] ]

The following protection techniques shall be acceptable for electrical and electronic equipment inhazardous (classified) locations.



CN_88.pdf 70_CN88



The Correlating Committee directs CMP-14 to reconsider the parent text of 500.7 for clarity and usability in general and with specific regard to the words "shall be acceptable".This action will be considered as a Public Comment.

Related Item





Street Address:

City:

State:

Zip:


Committee: NEC-P14





18 of 196 9/14/2018, 10:17 AM


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Correlating Committee Note No. 88-NFPA 70-2018 [ Section No. 500.7 [Excluding

any Sub-Sections] ]




CommitteeStatement:

The Correlating Committee directs CMP-14 to reconsider the parent text of 500.7 for clarityand usability in general and with specific regard to the words "shall be acceptable". This action will be considered as a Public Comment.

First Revision No. 7865-NFPA 70-2018 [Section No. 500.7 [Excluding any Sub-Sections]]

Ballot Results





Dressman, Kevin L.

Hickman, Palmer L.

Hittinger, David L.

Holub, Richard A.


Kovacik, John R.

Manche, Alan

McDaniel, Roger D.

Pierce, James F.


Williams, David A.


Page 44 of 262

Public Comment No. 1051-NFPA 70-2018 [ Section No. 500.8(G) ]

(G) Equipment Involving Optical Radiation.

For equipment involving sources of optical radiation (such as laser or LED sources) in the wavelengthrange from 380 nm to 10 μm, the risk of ignition from optical radiation shall be considered for all electricalparts and circuits that may be exposed to the radiation, both inside and outside the optical equipment. Thisincludes optical equipment, which itself is located outside the explosive atmosphere, but its emitted opticalradiation enters such atmospheres.

Informational Note: For additional information on types of protection that can be applied to minimizethe risk of ignition in explosive atmospheres from optical radiation, see ANSI/UL 60079-28-2017,Explosive Atmospheres — Part 28: Protection of Equipment and Transmission Systems UsingOptical Radiation.

Exception: All luminaires (fixed, portable, or transportable) and hand lights intended to be supplied bymains (with or without galvanic isolation) or powered by batteries, with any continuous divergent lightsource, including LEDs.



CN_89.pdf 70_CN89



The Correlating Committee directs that this First Revision be reviewed for compliance with section 3.1.4.1 of the NEC Style Manual. The Exception is not written in a complete sentence and does not contain mandatory language.This action shall be considered as a public comment.

Related Item





Street Address:

City:

State:

Zip:


Committee: NEC-P14





19 of 196 9/14/2018, 10:17 AM


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Correlating Committee Note No. 89-NFPA 70-2018 [ New Section after 500.8(F) ]




CommitteeStatement:

The Correlating Committee directs that this First Revision be reviewed for compliance withsection 3.1.4.1 of the NEC Style Manual. The Exception is not written in a complete sentenceand does not contain mandatory language. This action shall be considered as a public comment.

First Revision No. 7861-NFPA 70-2018 New Section after 500.8(F)

Ballot Results





Dressman, Kevin L.

Hickman, Palmer L.

Hittinger, David L.

Holub, Richard A.


Kovacik, John R.

Manche, Alan

McDaniel, Roger D.

Pierce, James F.


Williams, David A.


Page 46 of 262

Public Comment No. 328-NFPA 70-2018 [ Sections 501.10(A), 501.10(B) ]

Sections 501.10(A), 501.10(B)

(A) Class I, Division 1.


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(1) General.

In Class I, Division 1 locations, the following wiring methods shall be permitted:

(1) Threaded rigid metal conduit or threaded steel intermediate metal conduit.

Exception: Type PVC conduit, Type RTRC conduit, and Type HDPE conduit shall be permitted whereencased in a concrete envelope a minimum of 50 mm (2 in.) thick and provided with not less than600 mm (24 in.) of cover measured from the top of the conduit to grade. The concrete encasementshall be permitted to be omitted where subject to the provisions of 514.8, Exception No. 2, or515.8(A). Threaded rigid metal conduit or threaded steel intermediate metal conduit shall be used forthe last 600 mm (24 in.) of the underground run to emergence or to the point of connection to theaboveground raceway. An equipment grounding conductor shall be included to provide for electricalcontinuity of the raceway system and for grounding of non–current-carrying metal parts.

(2) Type MI cable terminated with fittings listed for the location. Type MI cable shall be installed andsupported in a manner to avoid tensile stress at the termination fittings.

(3) Type MC-HL Cable. In industrial establishments with restricted public access, where the conditions ofmaintenance and supervision ensure that only qualified persons service the installation,

(4) Listed Type MC-HL cable with a gas/vaportight continuous corrugated metallic sheath, an overalljacket of suitable polymeric material, and a separate equipment grounding conductor(s) inaccordance with 250.122 , and terminated with fittings listed for the location.

(5) Listed Type MC-HL cable with an interlocked metallic sheath that meets the crush and impactrequirements of Type MC-HL cable with a continuous corrugated metallic sheath, an overallgas/vaportight jacket of suitable polymeric material, and a separate equipment groundingconductor(s) in accordance with 250.122 , and terminated with fittings listed for the location.

Type MC-HL cable shall be installed in accordance with the provisions of Article 330, Part II.

(6) In industrial establishments with restricted public access, where the conditions of maintenance andsupervision ensure that only qualified persons service the installation, Type ITC-HL cable listed for usein Class I, Zone 1 or Division 1 locations, with a gas/vaportight continuous corrugated metallic sheathand an overall jacket of suitable polymeric material, and terminated with fittings listed for theapplication, and installed in accordance with the provisions of Article 727.

(7) Optical fiber cable Types OFNP, OFCP, OFNR, OFCR, OFNG, OFCG, OFN, and OFC shall bepermitted to be installed in raceways in accordance with 501.10(A). These optical fiber cables shall besealed in accordance with 501.15.

(8) In industrial establishments with restricted public access, where the conditions of maintenance andsupervision ensure that only qualified persons service the installation, for applications limited to 600volts nominal or less, and where the cable is not subject to physical damage, and terminated withfittings listed for the location, Type TC-ER-HL cable. Type TC-ER-HL cable shall be listed for use inClass I, Division 1 or Zone 1 locations and shall be installed in accordance with 336.10, including therestrictions of 336.10(7).

Informational Note: See the information on construction, testing, and marking of cables andcable fittings in ANSI/UL 2225-2013, Cables and Cable-Fittings for Use in Hazardous(Classified) Locations.

(9)In industrial establishments with restricted public access, where the conditions of maintenance andsupervision ensure that only qualified persons service the installation, listed Type P cable with metalbraid armor, with an overall jacket, terminated with fittings listed for the location, and installed inaccordance with Article 337.

Informational Note No. 1: For information on construction, testing, and marking of Type Pcable, see ANSI/UL 1309-2017, Marine Shipboard Cable .

Informational Note No. 2: For information on construction, testing, and marking of cable fittings,see ANSI/UL 2225-2013, Cables and Cable-Fittings for Use in Hazardous (Classified)Locations.


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(2) Flexible Connections.

Where necessary to employ flexible connections, as at motor terminals, one of the following shall bepermitted:

(1) Flexible fittings listed for the location.

(2) Flexible cord in accordance with the provisions of 501.140, terminated with cord connectors listed forthe location.

(3) In industrial establishments with restricted public access, where the conditions of maintenance andsupervision ensure that only qualified persons service the installation, for applications limited to600 volts nominal or less, and where the cable is not subject to physical damage, and terminated withfittings listed for the location. Type TC-ER-HL cable shall be listed for use in Class I, Division 1 or Zone1 locations and shall be installed in accordance with 336.10, including the restrictions of 336.10(7).


(4) In industrial establishments with restricted public access, where the conditions of maintenance andsupervision ensure that only qualified persons service the installation, listed Type P cable with metalbraid armor, with an overall jacket, terminated with fittings listed for the location, and installed inaccordance with Article 337.

(5)

Informational Note No. 1: For information on construction, testing, and marking of Type P cable, seeANSI/UL 1309-2017, Marine Shipboard Cable.

Informational Note No. 2: For information on construction, testing, and marking of cable fittings, seeANSI/UL 2225-2013, Cables and Cable-Fittings for Use in Hazardous (Classified) Locations.

(3) Boxes and Fittings.

All boxes and fittings shall be approved for Class I, Division 1.

Informational Note: For entry into enclosures required to be explosionproof, see the information onconstruction, testing, and marking of cables, explosionproof cable fittings, and explosionproof cordconnectors in ANSI/UL 2225-2013, Cables and Cable-Fittings for Use in Hazardous (Classified)Locations.

(B) Class I, Division 2.


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(1) General.

In Class I, Division 2 locations, all wiring methods permitted in 501.10(A) and the following wiring methodsshall be permitted:

(1) Rigid metal conduit (RMC) and intermediate metal conduit (IMC) with listed threaded or threadlessfittings.

(2) Enclosed gasketed busways and enclosed gasketed wireways.

(3) Type PLTC and Type PLTC-ER cable in accordance with the provisions of Article 725, includinginstallation in cable tray systems. The cable shall be terminated with listed fittings. Type PLTC-ERcable shall include an equipment grounding conductor in addition to a drain wire.

(4) Type ITC and Type ITC-ER cable as permitted in 727.4 and terminated with listed fittings. Type ITC-ERcable shall include an equipment grounding conductor in addition to a drain wire.

(5) Type MC, MV, TC, or TC-ER cable, including installation in cable tray systems. The cable shall beterminated with listed fittings.

(6) Where metal conduit will not provide sufficient corrosion resistance, any of the following shall bepermitted:

(7) Listed reinforced thermosetting resin conduit (RTRC), factory elbows, and associated fittings, allmarked with the suffix -XW

(8) PVC-coated rigid metal conduit (RMC), factory elbows, and associated fittings

(9) PVC-coated intermediate metal conduit (IMC), factory elbows, and associated fittings

(10) In industrial establishments with restricted public access, where the conditions of maintenanceand supervision ensure that only qualified persons service the installation, Schedule 80 PVCconduit, factory elbows, and associated fittings

(11) Optical fiber cable Types OFNP, OFCP, OFNR, OFCR, OFNG, OFCG, OFN, and OFC shall bepermitted to be installed in cable trays or any other raceway in accordance with 501.10(B). Optical fibercables shall be sealed in accordance with 501.15.

(12) Cablebus.

(13) In industrial establishments with restricted public access, where the conditions of maintenance andsupervision ensure that only qualified persons service the installation, listed Type P cable with orwithout metal braid armor, with an overall jacket, terminated with fittings listed for the location, andinstalled in accordance with Article 337 .

Informational Note No. 1: For information on construction, testing, and marking of Type P cable,see ANSI/UL 1309-2017, Marine Shipboard Cable.


Where seals are required for boundary conditions as defined in 501.15(A)(4), the Division 1 wiring methodshall extend into the Division 2 area to the seal, which shall be located on the Division 2 side of the Division1–Division 2 boundary.


Where provision must be made for flexibility, one or more of the following shall be permitted:

(1) Listed flexible metal fittings.

(2) Flexible metal conduit with listed fittings.

(3) Interlocked armor Type MC cable with listed fittings.

(4) Liquidtight flexible metal conduit with listed fittings.

(5) Liquidtight flexible nonmetallic conduit with listed fittings.

(6) Flexible cord listed for extra-hard usage and terminated with listed fittings. A conductor for use as anequipment grounding conductor shall be included in the flexible cord.

(7) For elevator use, an identified elevator cable of Type EO, ETP, or ETT, shown under the “use” columnin Table 400.4 for “hazardous (classified) locations” and terminated with listed fittings.

Informational Note: See 501.30(B) for grounding requirements where flexible conduit is used.


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(3) Nonincendive Field Wiring.

Nonincendive field wiring shall be permitted using any of the wiring methods permitted for unclassifiedlocations. Nonincendive field wiring systems shall be installed in accordance with the control drawing(s).Simple apparatus, not shown on the control drawing, shall be permitted in a nonincendive field wiringcircuit, provided the simple apparatus does not interconnect the nonincendive field wiring circuit to anyother circuit.

Informational Note: Simple apparatus is defined in Article 100 Part III.

Separate nonincendive field wiring circuits shall be installed in accordance with one of the following:

(1) In separate cables

(2) In multiconductor cables where the conductors of each circuit are within a grounded metal shield

(3) In multiconductor cables or in raceways, where the conductors of each circuit have insulation with aminimum thickness of 0.25 mm (0.01 in.)

(4) Boxes and Fittings.

Boxes and fittings shall not be required to be explosionproof except as required by 501.105(B)(2),501.115(B)(1), and 501.150(B)(1).

Informational Note: For entry into enclosures required to be explosionproof, see the information onconstruction, testing, and marking of cables, explosionproof cable fittings, and explosionproof cordconnectors in ANSI/UL 2225-2013, Cables and Cable-Fittings for Use in Hazardous (Classified)Locations.


A separate proposal to delete Article 337 from the 2020 NEC has been submitted. Therefore, Type P should be deleted from Article 501.



Public Comment No. 326-NFPA 70-2018 [Article 337]


Related Item

• None


Submitter Full Name: Philip Laudicina

Organization: Nexans AmerCable

Street Address:

City:

State:

Zip:


Committee: NEC-P14


I, Philip Laudicina, hereby irrevocably grant and assign to the National Fire Protection Association (NFPA) all and full rights in copyright inthis Public Comment (including both the Proposed Change and the Statement of Problem and Substantiation). I understand and intend thatI acquire no rights, including rights as a joint author, in any publication of the NFPA in which this Public Comment in this or another similaror derivative form is used. I hereby warrant that I am the author of this Public Comment and that I have full power and authority to enterinto this copyright assignment.

By checking this box I affirm that I am Philip Laudicina, and I agree to be legally bound by the above Copyright Assignment and theterms and conditions contained therein. I understand and intend that, by checking this box, I am creating an electronic signature that will,upon my submission of this form, have the same legal force and effect as a handwritten signature


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(1) General.













(9) In industrial establishments with restricted public access, where the conditions of maintenance andsupervision ensure that only qualified persons service the installation, listed Type P-HL cable withmetal braid armor , with an overall jacket, terminated with fittings listed for the location, and installed inaccordance with Article 337.




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CMP-6 adopted the language "Type P-HL" to include type-P with braided armor in Article 337.120. This language in Chapter 5 should parallel the terminology defined in Article 337.

Related Item

• FR-8036




Street Address:

City:

State:

Zip:

Submittal Date: Fri Aug 24 13:19:23 EDT 2018

Committee: NEC-P14





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(1) General.







(5) Listed Type MC-HL cable with an interlocked metallic sheath that meets the crush and impactrequirements of Type MC-HL cable with an inner gas/vaportight jacket of suitable polymericmaterial, a continuous corrugated metallic sheath, an overall gas/vaportight jacket of suitablepolymeric material, and a separate equipment grounding conductor(s) in accordance with250.122 , and terminated with fittings listed for the location.










The gas/vaportight outer jacket of MC cables is relatively thin and can be cut during installation. The MC-HL Cable with continuous metallic sheath provides a second vapor barrier. The TC-ER cables have a significantly more robust jacket. If the NEC is going to allow interlocked armor type MC cable in Class I, Division 1 and Zone 1


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locations, the NEC should require a second gas/vapor barrier. The addition of interlocked armor type of MC Cable does not satisfy any current need. The MC cable with the continuous metallic sheath provides a second vapor barrier and the TC-ER cable offers greater flexibility.

Related Item

• FR7837


Submitter Full Name: William McBride

Organization: CONAM Construction Company

Street Address:

City:

State:

Zip:

Submittal Date: Mon Aug 27 11:27:31 EDT 2018

Committee: NEC-P14


I, William McBride, hereby irrevocably grant and assign to the National Fire Protection Association (NFPA) all and full rights in copyright inthis Public Comment (including both the Proposed Change and the Statement of Problem and Substantiation). I understand and intend thatI acquire no rights, including rights as a joint author, in any publication of the NFPA in which this Public Comment in this or another similaror derivative form is used. I hereby warrant that I am the author of this Public Comment and that I have full power and authority to enterinto this copyright assignment.

By checking this box I affirm that I am William McBride, and I agree to be legally bound by the above Copyright Assignment and theterms and conditions contained therein. I understand and intend that, by checking this box, I am creating an electronic signature that will,upon my submission of this form, have the same legal force and effect as a handwritten signature


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(1) General.











(8) In industrial establishments with restricted public access, where the conditions of maintenance andsupervision ensure that only qualified persons service the installation, for applications limited to 600volts nominal or less, and where the cable is not subject to physical damage, and terminated withfittings listed for the location, Type TC-ER-HL cable. Type TC-ER-HL cable shall be listed for use inClass I, Division 1 or Zone 1 locations and shall , shall meet the requirements of 336.130, and shallbe installed in accordance with 336.10, including the restrictions of 336 .10(7) .






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The reference to 336.10(7) is redundant and not required as the entire section of 336.10 is required. The additional construction requirements for this cable defined in 336.130 need to be included in this section.

Related Item

• FR 7565


Submitter Full Name: Dave Burns

Organization: Shell P&T: Innovation/R&D

Street Address:

City:

State:

Zip:


Committee: NEC-P14


I, Dave Burns, hereby irrevocably grant and assign to the National Fire Protection Association (NFPA) all and full rights in copyright in thisPublic Comment (including both the Proposed Change and the Statement of Problem and Substantiation). I understand and intend that Iacquire no rights, including rights as a joint author, in any publication of the NFPA in which this Public Comment in this or another similar orderivative form is used. I hereby warrant that I am the author of this Public Comment and that I have full power and authority to enter intothis copyright assignment.

By checking this box I affirm that I am Dave Burns, and I agree to be legally bound by the above Copyright Assignment and the termsand conditions contained therein. I understand and intend that, by checking this box, I am creating an electronic signature that will, uponmy submission of this form, have the same legal force and effect as a handwritten signature


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(1) General.









(6) In industrial establishments with restricted public access, where the conditions of maintenance andsupervision ensure that only qualified persons service the installation, Type ITC-HL cable listed for usein Class I, Zone Division 1 or Division 1 locations Zone 1 locations , with a gas/vaportight continuouscorrugated metallic sheath and an overall jacket of suitable polymeric material, and terminated withfittings listed for the application, and installed in accordance with the provisions of Article 727.








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To correlate with committee action on FR-7789, Class I is deleted in reference to the Zone 0, 1, and 2 locations, though it remains in the text as an optional marking for the equipment and in titles of other documents referenced in the informational notes until such documents titles are updated.

Related Item

• FR-7789




Street Address:

City:

State:

Zip:


Committee: NEC-P14





34 of 196 9/14/2018, 10:17 AM


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(1) General.



Exception: Type PVC conduit, Type RTRC conduit, and Type HDPE conduit shall be permittedwhere encased in a concrete envelope a minimum of 50 mm (2 in.) thick and provided with not lessthan 600 mm (24 in.) of cover measured from the top of the conduit to grade. The concreteencasement shall be permitted to be omitted where subject to the provisions of 514.8, ExceptionNo. 2, or 515.8(A). Threaded rigid metal conduit or threaded steel intermediate metal conduit shallbe used for the last 600 mm (24 in.) of the underground run to emergence or to the point ofconnection to the aboveground raceway. An equipment grounding conductor shall be included toprovide for electrical continuity of the raceway system and for grounding of non–current-carryingmetal parts.



(1) Listed Type MC-HL cable with a gas/vaportight continuous corrugated metallic sheath, an overalljacket of suitable polymeric material, and a separate equipment grounding conductor(s) inaccordance with 250.122, and terminated with fittings listed for the location.

(2) Listed Type MC-HL cable with an interlocked metallic sheath that meets the crush and impactrequirements of Type MC-HL cable with a continuous corrugated metallic sheath, an overallgas/vaportight jacket of suitable polymeric material, and a separate equipment groundingconductor(s) in accordance with 250.122, and terminated with fittings listed for the location.


(4) In industrial establishments with restricted public access, where the conditions of maintenance andsupervision ensure that only qualified persons service the installation, Type ITC-HL cable listed foruse in Class I, Zone 1 or Division 1 locations, with a gas/vaportight continuous corrugated metallicsheath and an overall jacket of suitable polymeric material, and terminated with fittings listed for theapplication, and installed in accordance with the provisions of Article 727.








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CN_90.pdf 70_CN90



The Correlating Committee directs that First Revision 7565 be reviewed for compliance of section 4.1 of the NEC Style Manual on the use ofredundant section references.This action will be considered as a public comment.

Related Item





Street Address:

City:

State:

Zip:


Committee: NEC-P14





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Correlating Committee Note No. 90-NFPA 70-2018 [ Detail ]


Submitter Full Name: Sarah CaldwellCommittee: Submittal Date: Thu May 10 11:13:57 EDT 2018



The Correlating Committee directs that First Revision 7565 be reviewed for compliance of section 4.1 of the NEC Style Manual on the use of redundant section references.


First Revision No. 7565-NFPA 70-2018 [Detail]

Ballot Results





Dressman, Kevin L.

Hickman, Palmer L.

Hittinger, David L.

Holub, Richard A.


Kovacik, John R.

Manche, Alan

McDaniel, Roger D.

Pierce, James F.


Williams, David A.




Page 64 of 262


(1) General.

















37 of 196 9/14/2018, 10:17 AM


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CN_92.pdf 70_CN92



The Correlating Committee directs that this First Revision be reviewed for clarity and usability with respect to the difference between list items(1) and (2).This action will be considered as a public comment.

Related Item





Street Address:

City:

State:

Zip:


Committee: NEC-P14





38 of 196 9/14/2018, 10:17 AM


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The Correlating Committee directs that this First Revision be reviewed for clarity and usability with respect to the difference between list items (1) and (2).



Ballot Results





Dressman, Kevin L.

Hickman, Palmer L.

Hittinger, David L.

Holub, Richard A.


Kovacik, John R.

Manche, Alan

McDaniel, Roger D.

Pierce, James F.


Williams, David A.




Page 67 of 262


(1) General.

















39 of 196 9/14/2018, 10:17 AM


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CN_97.pdf 70_CN97



The Correlating Committee directs that this First Revision be reviewed for compliance of section 4.1.1 of the NEC Style Manual. References shallnot be made to an entire article.This action will be considered as a Public Comment.

Related Item





Street Address:

City:

State:

Zip:


Committee: NEC-P14





40 of 196 9/14/2018, 10:17 AM


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The Correlating Committee directs that this First Revision be reviewed for compliance of section 4.1.1 of the NEC Style Manual. References shall not be made to an entire article.



Ballot Results





Dressman, Kevin L.

Hickman, Palmer L.

Hittinger, David L.

Holub, Richard A.


Kovacik, John R.

Manche, Alan

McDaniel, Roger D.

Pierce, James F.


Williams, David A.




Page 70 of 262






(3) In industrial establishments with restricted public access, where the conditions of maintenance andsupervision ensure that only qualified persons service the installation, for applications limited to600 volts nominal or less, and where the cable is not subject to physical damage, and terminated withfittings listed for the location. Type TC-ER-HL cable shall be listed for use in Class I, Division 1 orZone 1 locations and shall be installed in accordance with 336.10, including the restrictions of336.10(7).







CN_91.pdf 70_CN91


NOTE: This Public Comment appeared as CC Note No. 91 in the First Draft Report on First Revision No. 7594

The Correlating Committee directs that this First Revision be reviewed for compliance of section 4.1 of the NEC Style Manual on the use of redundant section references.This action will be considered as a public comment.

Related Item





Street Address:

City:

State:

Zip:


Committee: NEC-P14


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Correlating Committee Note No. 91-NFPA 70-2018 [ Section No. 501.10(A)(2) ]


Submitter Full Name: Erik HohengasserCommittee:Submittal Date: Thu May 10 11:18:17 EDT 2018


CommitteeStatement:

The Correlating Committee directs that this First Revision be reviewed for compliance ofsection 4.1 of the NEC Style Manual on the use of redundant section references. This action will be considered as a public comment.

First Revision No. 7594-NFPA 70-2018 [Section No. 501.10(A)(2)]

Ballot Results





Dressman, Kevin L.

Hickman, Palmer L.

Hittinger, David L.

Holub, Richard A.


Kovacik, John R.

Manche, Alan

McDaniel, Roger D.

Pierce, James F.


Williams, David A.


Page 73 of 262






(3) In industrial establishments with restricted public access, where the conditions of maintenance andsupervision ensure that only qualified persons service the installation, for applications limited to600 volts nominal or less, and where the cable is not subject to physical damage, and terminated withfittings listed for the location. Type TC-ER-HL cable shall be listed for use in Class I, Division 1 or Zone1 locations and shall meet the requirements of 336.130, and shall be installed in accordance with336.10 , including the restrictions of 336 . 10(7).







Related Item

• FR 7594




Street Address:

City:

State:

Zip:


Committee: NEC-P14


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Where necessary to employ flexible connections, as at motor terminals, flexibility is required, one of thefollowing shall be permitted:



(3) In industrial establishments with restricted public access, where the conditions of maintenance andsupervision ensure that only qualified persons service the installation, for applications limited to600 volts nominal or less, and where the cable is not subject to physical damage, and terminated withfittings listed for the location. Type TC-ER-HL cable shall be listed for use in Class I, Division 1 or Zone1 locations and shall be installed in accordance with 336.10, including the restrictions of 336.10(7).


(4) In industrial establishments with restricted public access, where the conditions of maintenance andsupervision ensure that only qualified persons service the installation, listed Type P cable with metalbraid armor, with an overall jacket, terminated with fittings listed for the location, and installed inaccordance with Article 337 .




Not sure if this section is ONLY addressing the connection point, since this cable is now potentially allowed for general use assuming this Article is published as now written. However, referring back to the 2017 NEC, this wording implies the cable only needs to be flexible at the connection and not necessarily along its length coming off the tray to the connection. This topic is repeatedly debated at standards meetings with no resolution on what it means. The NEC Handbook (from 2014) indicated at the terminal only which made this even more muddy. CMP 14 needs to clarify the meaning of flexibility here. Is it the entire length coming off the tray? Is it just at the connection? Is there some length limitation? I recommend just changing the verbiage to state where flexibility is needed which will allow for the entire length of the cable so ease of installation can be achieved and it cannot be argued that this is only for the point of connection.

Reference to Type P needs to be deleted.




Related Item

• None




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Zip:


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(3) In industrial establishments with restricted public access, where the conditions of maintenance andsupervision ensure that only qualified persons service the installation, for applications limited to600 volts nominal or less, and where the cable is not subject to physical damage, and terminated withfittings listed for the location. Type TC-ER-HL cable shall be listed for use in Class I, Division 1 orZone 1 locations and shall be installed in accordance with 336.10, including the restrictions of336.10(7).







CN_128.pdf 70_CN128





Related Item





Street Address:

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State:

Zip:



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Committee: NEC-P14





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Ballot Results





Dressman, Kevin L.

Hickman, Palmer L.

Hittinger, David L.

Holub, Richard A.


Kovacik, John R.

Manche, Alan

McDaniel, Roger D.

Pierce, James F.


Williams, David A.




Page 80 of 262

Public Comment No. 1218-NFPA 70-2018 [ Section No. 501.10(B)(1) ]

(1) General.





(4) Type ITC and Type ITC-ER cable as permitted in 727.4 and terminated with listed fittings. Type ITC-ER cable shall include an equipment grounding conductor in addition to a drain wire.








(12) Cablebus.

(13) In industrial establishments with restricted public access, where the conditions of maintenance andsupervision ensure that only qualified persons service the installation, listed Type P cable with orwithout metal braid armor , with an overall jacket, terminated with fittings listed for the location, andinstalled in accordance with Article 337.





CMP-6 adopted the language "Type P-HL" to include type-P with braided armor in Article 337.120. As 501.10(A) allows Type P-HL, there is no need to mention that cable construction in the Division 2 permissions. The Division 2 permission should more generically state "Type P" which would be inclusive of that with or without armor.

Related Item

• FR-8036 • FR-7616


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Street Address:

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Zip:


Committee: NEC-P14





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(1) General.






(5) Type MC, MV, TC, or TC-ER cable, including installation in cable tray systems. Type TC-ER cableshall include an equipment grounding conductor in addition to a drain wire that may be present. Thecable shall be terminated with listed fittings.







(12) Cablebus.

(13) In industrial establishments with restricted public access, where the conditions of maintenance andsupervision ensure that only qualified persons service the installation, listed Type P cable with orwithout metal braid armor, with an overall jacket, terminated with fittings listed for the location, andinstalled in accordance with Article 337.





The panel should adopt this new language with the TC-ER language so the TC-ER constructions also require a separate equipment grounding conductor, in addition to any drain wire that may be present. Recent evidence has shown that TC-ER cable constructions are being sold into the market with single pair construction with drain wire, 600V insulation, and with TC-ER marking (as opposed to ITC-ER). The drain wire cannot serve as the EGC as it is not connected at both ends.


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Related Item

• FR-7620




Street Address:

City:

State:

Zip:


Committee: NEC-P14





52 of 196 9/14/2018, 10:17 AM


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(1) General.













(12) Cablebus.


(14) Electrical Metallic Tubing (EMT) when used with compression type fittings.





The code panels substantiation statement that EMT is not equivalent to any existing approved wiring methods in Class I, Division 2 locations is incorrect. The wall thickness for EMT is greater than the armor provided on Metal Clad cables which are approved for use in Class I, Division 2 locations. EMT also offers greater physical protection than the other cables permitted in Class I Division 2 locations. Type MI cable, Type MC cable and EMT fittings are


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all listed to UL 514B. The pull force test requirements for EMT fittings in UL 514B are at least 4 times higher than what is specified for Type MI and Type MC cable. Since fittings listed to UL 514b are approved for Class I Division 2 locations, EMT compression fittings are already listed for these locations the same as the other wiring methods.

EMT is permitted to be installed where subject to physical damage but not subject to severe physical damage per NEC article 358. Damage to EMT resulting in an open ignition source would be severe physical damage, since EMT is not permitted to be installed where subject to severe physical damage this situation would not occur. The idea that it is installed improperly or in an unapproved location should not be substantiation for excluding its approval. It would be the same as saying unqualified persons can service installation in industrial establishments.

The wall thickness for EMT is less than rigid conduit and IMC; however, other wiring methods have been approved for Class I Division 2 locations that were not based on wall thickness or physical protection compared to rigid and IMC.

Related Item

• PI 3657


Submitter Full Name: Dale Crawford

Organization: Steel Tube Institute

Street Address:

City:

State:

Zip:


Committee: NEC-P14


I, Dale Crawford, hereby irrevocably grant and assign to the National Fire Protection Association (NFPA) all and full rights in copyright inthis Public Comment (including both the Proposed Change and the Statement of Problem and Substantiation). I understand and intend thatI acquire no rights, including rights as a joint author, in any publication of the NFPA in which this Public Comment in this or another similaror derivative form is used. I hereby warrant that I am the author of this Public Comment and that I have full power and authority to enterinto this copyright assignment.

By checking this box I affirm that I am Dale Crawford, and I agree to be legally bound by the above Copyright Assignment and the termsand conditions contained therein. I understand and intend that, by checking this box, I am creating an electronic signature that will, uponmy submission of this form, have the same legal force and effect as a handwritten signature


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(1) General.









(8) PVC-coated rigid metal conduit (RMC), factory elbows, and associated fittingsPVC-coated intermediate metal conduit (IMC), factory elbows, and associated fittings

a. Type RMC with protective coatings approved for the area.

b. Type IMC with protective coatings approved for the area.

c. In industrial establishments with restricted public access, where the conditions of maintenance andsupervision ensure that only qualified persons service the installation, Schedule 80 PVC conduit,factory elbows, and associated fittings


(10) Cablebus.






This limits the wiring methods that can be used to the PVC coated IMC and RMC and RTRC raceways and associated fittings marked with the suffix -XW in non-industrial locations. PVC Coated IMC and RMC raceways are just the regular heavy wall (RMC) and Intermediate wall (IMC) conduit with the PVC coating added. They are not additional wiring methods recognized in the NEC that are listed for an area that has a corrosive environment. The


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PVC is just added to the conduit to help protect the conduit in corrosive areas. Any approved method that will provide additional corrosion protection that can be added to either RMC or IMC shall be permitted to be applied to the raceways to prevent or reduce the possible damage to the metallic raceway. Such examples of protection methods could be wraps, paints, Rino type coatings. (I also would like to point out that Terraview formatted the numbering incorrectly)

Related Item

• FR 7572


Submitter Full Name: David Hittinger

Organization: IEC

Affiliation: Independent Electrical Contractors Inc.

Street Address:

City:

State:

Zip:


Committee: NEC-P14


I, David Hittinger, hereby irrevocably grant and assign to the National Fire Protection Association (NFPA) all and full rights in copyright inthis Public Comment (including both the Proposed Change and the Statement of Problem and Substantiation). I understand and intend thatI acquire no rights, including rights as a joint author, in any publication of the NFPA in which this Public Comment in this or another similaror derivative form is used. I hereby warrant that I am the author of this Public Comment and that I have full power and authority to enterinto this copyright assignment.

By checking this box I affirm that I am David Hittinger, and I agree to be legally bound by the above Copyright Assignment and the termsand conditions contained therein. I understand and intend that, by checking this box, I am creating an electronic signature that will, uponmy submission of this form, have the same legal force and effect as a handwritten signature


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(3) Nonincendive Field Wiring.

Nonincendive field wiring shall be permitted using any of the wiring methods permitted for unclassifiedlocations. Nonincendive field wiring systems shall be installed in accordance with the control drawing(s).Simple apparatus, not shown on the control drawing, shall be permitted in a nonincendive field wiringcircuit, provided the simple apparatus does not interconnect the nonincendive field wiring circuit to anyother circuit.


Separate nonincendive field wiring circuits shall be installed in accordance with one of the following:



(3) In multiconductor cables or in raceways, where the conductors of each circuit have insulation with aminimum thickness of 0.25 mm (0.01 in.)



CN_130.pdf 70_CN130





Related Item





Street Address:

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Ballot Results





Dressman, Kevin L.

Hickman, Palmer L.

Hittinger, David L.

Holub, Richard A.


Kovacik, John R.

Manche, Alan

McDaniel, Roger D.

Pierce, James F.


Williams, David A.




Page 90 of 262


(1) Entering Enclosures.

Each conduit entry into an explosionproof enclosure shall have a conduit seal where either of the followingconditions apply:

(1) The enclosure contains apparatus, such as switches, circuit breakers, fuses, relays, or resistors thatmay produce arcs, sparks, or temperatures that exceed 80 percent of the autoignition temperature, indegrees Celsius, of the gas or vapor involved in normal operation.

Exception: Seals shall not be required for conduit entering an enclosure under any one of thefollowing conditions:

(1) The switch, circuit breaker, fuse, relay, or resistor is enclosed within a chamber hermeticallysealed against the entrance of gases or vapors.

(2) The switch, circuit breaker, fuse, relay, or resistor is immersed in oil in accordance with501.115(B)(1)(2).

(3) The switch, circuit breaker, fuse, relay, or resistor is enclosed within an enclosure, identified forthe location, and marked “Leads Factory Sealed,” or “Factory Sealed,” “Seal not Required,” orequivalent.

(4) The switch, circuit breaker, fuse, relay, or resistor is part of a nonincendive circuit.

(2) The entry is metric designator 53 (trade size 2) or larger, and the enclosure contains terminals,splices, or taps.

An enclosure, identified for the location, and marked “Leads Factory Sealed”, or “Factory Sealed,” or “Sealnot Required,” or equivalent shall not be considered to serve as a seal for another adjacent enclosure thatis required to have a conduit seal.

Conduit seals shall be installed within 450 mm (18 in.) from the enclosure or as required by the enclosuremarking. Only threaded couplings, or explosionproof Explosionproof fittings such as unions, reducers,elbows, and capped elbows that are not larger than the trade size of the conduit, shall be permittedbetween the sealing fitting and the explosionproof enclosure.


500.8(E)(1) requires that conduit and conduit fittings used in classified have NPT threads. Conduit couplings are "fittings" and do not have NPT threads. The conduit couplings have straight threads and do not provide the same sealing and restriction on the passage of hot gasses after an explosion as would a connection where both the male and female threads are NPT (tapered). I can find no indication that standard straight thread conduit couplings mated with standard conduit threads have ever been evaluated for the purpose of containing hot explosive gasses and letting them escape slowly so as to cool them below the auto ignition temperature of the flammable gasses. I ask the panel members to take a look at the threads on an explosion proof conduit body and compare the fit of those threads to the rather sloppy fit of a conduit coupling with male conduit threads. I have zero confidence that the conduit coupling will be able to contain the explosion to the enclosure and prevent an even larger explosion exterior to the enclosure.

Related Item

• Public Input No. 1381-NFPA 70-2017


Submitter Full Name: Don Ganiere

Organization: [ Not Specified ]

Street Address:

City:

State:


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Zip:


Committee: NEC-P14


I, Don Ganiere, hereby irrevocably grant and assign to the National Fire Protection Association (NFPA) all and full rights in copyright in thisPublic Comment (including both the Proposed Change and the Statement of Problem and Substantiation). I understand and intend that Iacquire no rights, including rights as a joint author, in any publication of the NFPA in which this Public Comment in this or another similar orderivative form is used. I hereby warrant that I am the author of this Public Comment and that I have full power and authority to enter intothis copyright assignment.

By checking this box I affirm that I am Don Ganiere, and I agree to be legally bound by the above Copyright Assignment and the termsand conditions contained therein. I understand and intend that, by checking this box, I am creating an electronic signature that will, uponmy submission of this form, have the same legal force and effect as a handwritten signature


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(6) Connections.

To facilitate replacements, process control instruments shall be permitted to be connected through flexiblecord, attachment plug and receptacle, provided that all of the following conditions apply:

(1) The attachment plug and receptacle are listed for use in Class I, Division 2 locations and listed for usewith flexible cords.

Exception No. 1: A Class I, Division 2 listing is not required if the circuit involves only nonincendivefield wiring.

Exception No. 2: In industrial establishments where the conditions of maintenance and supervisionensure that only qualified individuals service the installation, the Class I, Division 2 listing is notrequired when the requirements of 501.105(B)(6)(2), (B)(6)(3), and (B)(6)(4) are satisfied and thereceptacle carries a label warning against plugging or unplugging when energized.

(2) The flexible cord does not exceed 900 mm (3 ft), is of a type listed for extra-hard usage, or if listed forhard usage is protected by location.

(3) Only necessary receptacles are provided.

(4) Unless the attachment plug and receptacle are interlocked mechanically or electrically, or otherwisedesigned so that they cannot be separated when the contacts are energized and the contacts cannotbe energized when the plug and socket outlet are separated, a switch complying with 501.105(B)(2)shall be provided so that the attachment plug or receptacle is not depended on to interrupt current.

Exception: The switch shall not be required if the circuit is nonincendive field wiring.



FR7632.docx FR7632


501.105 (B) (6) Connections; Already allows for connections by means of attachment plug and receptacle in all types of facilities, the new exception (2) for industrial establishments that deletes the requirement for a Class 1 Division II location based on a warning label to disconnect the power that is still required by (B) (6) (4) to be mechanically or electrically locked to prevent the contacts from being disconnected when energized only reduces the level of safety due to deleting the requirements for the attachment plug and receptacle being listed for a Class I Division II location. This is still a Classified Location and the hazards still exists and is addressed in (B) (6) (4).

Related Item

• FR7632


Submitter Full Name: Haywood Kines

Organization: Prince William County Building

Affiliation: Haywood Kines

Street Address:

City:

State:

Zip:


Committee: NEC-P14


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I, Haywood Kines, hereby irrevocably grant and assign to the National Fire Protection Association (NFPA) all and full rights in copyright inthis Public Comment (including both the Proposed Change and the Statement of Problem and Substantiation). I understand and intend thatI acquire no rights, including rights as a joint author, in any publication of the NFPA in which this Public Comment in this or another similaror derivative form is used. I hereby warrant that I am the author of this Public Comment and that I have full power and authority to enterinto this copyright assignment.

By checking this box I affirm that I am Haywood Kines, and I agree to be legally bound by the above Copyright Assignment and theterms and conditions contained therein. I understand and intend that, by checking this box, I am creating an electronic signature that will,upon my submission of this form, have the same legal force and effect as a handwritten signature


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(6) Connections. To facilitate replacements, process control instruments shall be permitted to be connected through flexible cord, attachment plug and receptacle, provided that all of the following conditions apply:

1. The attachment plug and receptacle are listed for use in Class I, Division 2 locations and listed for use with flexible cords. Exception No. 1: A Class I, Division 2 listing is not required if the circuit involves only nonincendive field wiring.

2. The flexible cord does not exceed 900 mm (3 ft), is of a type listed for extra-hard usage, or if listed for hard usage is protected by location.

3. Only necessary receptacles are provided. 4. Unless the attachment plug and receptacle are interlocked

mechanically or electrically, or otherwise designed so that they cannot be separated when the contacts are energized and the contacts cannot be energized when the plug and socket outlet are separated, a switch complying with 501.105(B)(2) shall be provided so that the attachment plug or receptacle is not depended on to interrupt current. Exception: The switch shall not be required if the circuit is nonincendive field wiring.


Page 95 of 262


(1) General.

In Class II, Division 1 locations, the following wiring methods shall be permitted:


(2) Type MI cable with termination fittings listed for the location. Type MI cable shall be installed andsupported in a manner to avoid tensile stress at the termination fittings.

(3) In industrial establishments with limited public access, where the conditions of maintenance andsupervision ensure that only qualified persons service the installation, Type MC-HL cable, listed for usein Class II, Division 1 locations, with a gas/vaportight continuous corrugated metallic sheath, an overalljacket of suitable polymeric material, a separate equipment grounding conductor(s) in accordance with250.122, and provided with termination fittings listed for the location, shall be permitted.

(4) Optical fiber cable Types OFNP, OFCP, OFNR, OFCR, OFNG, OFCG, OFN, and OFC shall bepermitted to be installed in raceways in accordance with 502.10(A). Optical fiber cables shall be sealedin accordance with 502.15.

(5) In industrial establishments with restricted public access, where the conditions of maintenance andsupervision ensure that only qualified persons service the installation, listed Type ITC-HL cable with agas/vaportight continuous corrugated metallic sheath and an overall jacket of suitable polymericmaterial, and terminated with fittings listed for the application, and installed in accordance with theprovisions of Article 727.

(6) In industrial establishments with restricted public access, where the conditions of maintenance andsupervision ensure that only qualified persons service the installation, for applications limited to 600volts nominal or less, and where the cable is not subject to physical damage, and terminated withfittings listed for the location, listed Type TC-ER-HL cable. When installed in ladder, ventilated trough,or ventilated channel cable trays, cables shall be installed in a single layer, with a space not less thanthe larger cable diameter between the two adjacent cables, unless otherwise protected against dustbuildup resulting in increased heat, Type TC-ER-HL cable shall be installed in accordance with 336.10,including the restrictions of 336.10(7).


(7) In industrial establishments with restricted public access, where the conditions of maintenance andsupervision ensure that only qualified persons service the installation, listed Type P-HL cable withmetal braid armor , with an overall jacket, terminated with fittings listed for the location and installed inaccordance with Article 337. When installed in ladder, ventilated trough, or ventilated channel cabletrays, cables shall be installed in a single layer, with a space not less than the larger cable diameterbetween the two adjacent cables, unless otherwise protected against dust buildup resulting inincreased heat.





Related Item

• FR-8036



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Street Address:

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Zip:


Committee: NEC-P14





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(1) General.




(3) In industrial establishments with limited public access, where the conditions of maintenance andsupervision ensure that only qualified persons service the installation, Type MC-HL cable, listed for usein Class II, Division 1 locations, with a gas/vaportight continuous corrugated metallic sheath, an overalljacket of suitable polymeric material, a separate equipment grounding conductor(s) in accordance with250.122, and provided with termination fittings listed for the location, shall be permitted.

(4) Optical fiber cable Types OFNP, OFCP, OFNR, OFCR, OFNG, OFCG, OFN, and OFC shall bepermitted to be installed in raceways in accordance with 502.10(A). Optical fiber cables shall be sealedin accordance with 502.15.


(6) In industrial establishments with restricted public access, where the conditions of maintenance andsupervision ensure that only qualified persons service the installation, for applications limited to 600volts nominal or less, and where the cable is not subject to physical damage, and terminated withfittings listed for the location, listed Type TC-ER-HL cable. When installed in ladder, ventilated trough,or ventilated channel cable trays, cables shall be installed in a single layer, with a space not less thanthe larger cable diameter between the two adjacent cables, unless otherwise protected against dustbuildup resulting in increased heat, Type TC-ER-HL cable shall meet the requirements of336.130, and shall be installed in accordance with 336.10 , including the restrictions of 336 . 10(7).


(7) In industrial establishments with restricted public access, where the conditions of maintenance andsupervision ensure that only qualified persons service the installation, listed Type P cable with metalbraid armor, with an overall jacket, terminated with fittings listed for the location and installed inaccordance with Article 337. When installed in ladder, ventilated trough, or ventilated channel cabletrays, cables shall be installed in a single layer, with a space not less than the larger cable diameterbetween the two adjacent cables, unless otherwise protected against dust buildup resulting inincreased heat.





Related Item

• FR 7725



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Street Address:

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Zip:


Committee: NEC-P14





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(1) General.




(3) In industrial establishments with limited public access, where the conditions of maintenance andsupervision ensure that only qualified persons service the installation, Type MC-HL cable, listed foruse in Class II, Division 1 locations, with a gas/vaportight continuous corrugated metallic sheath, anoverall jacket of suitable polymeric material, a separate equipment grounding conductor(s) inaccordance with 250.122, and provided with termination fittings listed for the location, shall bepermitted.

(4) Optical fiber cable Types OFNP, OFCP, OFNR, OFCR, OFNG, OFCG, OFN, and OFC shall bepermitted to be installed in raceways in accordance with 502.10(A). Optical fiber cables shall besealed in accordance with 502.15.


(6) In industrial establishments with restricted public access, where the conditions of maintenance andsupervision ensure that only qualified persons service the installation, for applications limited to 600volts nominal or less, and where the cable is not subject to physical damage, and terminated withfittings listed for the location, listed Type TC-ER-HL cable. When installed in ladder, ventilated trough,or ventilated channel cable trays, cables shall be installed in a single layer, with a space not less thanthe larger cable diameter between the two adjacent cables, unless otherwise protected against dustbuildup resulting in increased heat, Type TC-ER-HL cable shall be installed in accordance with336.10, including the restrictions of 336.10(7).







CN_131.pdf 70_CN131




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Related Item





Street Address:

City:

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Zip:


Committee: NEC-P14





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Ballot Results





Dressman, Kevin L.

Hickman, Palmer L.

Hittinger, David L.

Holub, Richard A.


Kovacik, John R.

Manche, Alan

McDaniel, Roger D.

Pierce, James F.


Williams, David A.




Page 102 of 262


(1) General.




(3) In industrial establishments with limited public access, where the conditions of maintenance andsupervision ensure that only qualified persons service the installation, Type MC-HL cable, listed foruse in Class II, Division 1 locations, with a gas/vaportight continuous corrugated metallic sheath, anoverall jacket of suitable polymeric material, a separate equipment grounding conductor(s) inaccordance with 250.122, and provided with termination fittings listed for the location, shall bepermitted.

(4) Optical fiber cable Types OFNP, OFCP, OFNR, OFCR, OFNG, OFCG, OFN, and OFC shall bepermitted to be installed in raceways in accordance with 502.10(A). Optical fiber cables shall besealed in accordance with 502.15.


(6) In industrial establishments with restricted public access, where the conditions of maintenance andsupervision ensure that only qualified persons service the installation, for applications limited to 600volts nominal or less, and where the cable is not subject to physical damage, and terminated withfittings listed for the location, listed Type TC-ER-HL cable. When installed in ladder, ventilated trough,or ventilated channel cable trays, cables shall be installed in a single layer, with a space not less thanthe larger cable diameter between the two adjacent cables, unless otherwise protected against dustbuildup resulting in increased heat, Type TC-ER-HL cable shall be installed in accordance with336.10, including the restrictions of 336.10(7).







CN_93.pdf 70_CN93




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Related Item





Street Address:

City:

State:

Zip:


Committee: NEC-P14





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Submitter Full Name: Erik HohengasserCommittee: Submittal Date: Thu May 10 11:19:37 EDT 2018



The Correlating Committee directs that this First Revision be reviewed for compliance of section 4.1 of the NEC Style Manual on the use of redundant section references.



Ballot Results





Dressman, Kevin L.

Hickman, Palmer L.

Hittinger, David L.

Holub, Richard A.


Kovacik, John R.

Manche, Alan

McDaniel, Roger D.

Pierce, James F.


Williams, David A.




Page 105 of 262



Where necessary to employ flexible connections, one or more of the following shall also be permitted:

(1) Dusttight flexible connectors.



(4) Interlocked armor Type MC cable having an overall jacket of suitable polymeric material and providedwith termination fittings listed for Class II, Division 1 locations.

(5) Flexible cord listed for extra-hard usage and terminated with listed dusttight cord connectors. Whereflexible cords are used, they shall comply with 502.140.

(6) For elevator use, an identified elevator cable of Type EO, ETP, or ETT, shown under the “use” columnin Table 400.4 for “hazardous (classified) locations” and terminated with listed dusttight fittings.


(7) In industrial establishments with restricted public access, where the conditions of maintenance andsupervision ensure that only qualified persons service the installation, for applications limited to 600volts nominal or less, and where the cable is not subject to physical damage, and terminated withfittings listed for the location, listed Type TC-ER-HL cable. Type TC-ER-HL cable shall be installed inaccordance with 336.10, including the restrictions of 336.10(7).







CN_94.pdf 70_CN94


NOTE: This Public Comment appeared as CC Note No. 94 in the First Draft Report on First Revision No. 7727


Related Item






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Street Address:

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Committee: NEC-P14





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Correlating Committee Note No. 94-NFPA 70-2018 [ Section No. 502.10(A)(2) ]




CommitteeStatement:

The Correlating Committee directs that this First Revision be reviewed for compliance ofsection 4.1 of the NEC Style Manual on the use of redundant section references. This action will be considered as a public comment.

First Revision No. 7727-NFPA 70-2018 [Section No. 502.10(A)(2)]

Ballot Results





Dressman, Kevin L.

Hickman, Palmer L.

Hittinger, David L.

Holub, Richard A.


Kovacik, John R.

Manche, Alan

McDaniel, Roger D.

Pierce, James F.


Williams, David A.


Page 108 of 262













(8) In industrial establishments with restricted public access, where the conditions of maintenance andsupervision ensure that only qualified persons service the installation, listed Type P-HL cable withmetal braid armor , with an overall jacket, terminated with fittings listed for the location, and installed inaccordance with Article 337.





Related Item

• FR-8036




Street Address:

City:

State:

Zip:


Committee: NEC-P14


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(7) In industrial establishments with restricted public access, where the conditions of maintenance andsupervision ensure that only qualified persons service the installation, for applications limited to 600volts nominal or less, and where the cable is not subject to physical damage, and terminated withfittings listed for the location, listed Type TC-ER-HL cable. Type TC-ER-HL cable shall meet therequirements of 336.130, and shall be installed in accordance with 336.10 , including the restrictionsof 336 . 10(7).







Related Item

• FR 7727




Street Address:

City:

State:

Zip:



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Committee: NEC-P14





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CN_132.pdf 70_CN132





Related Item





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Ballot Results





Dressman, Kevin L.

Hickman, Palmer L.

Hittinger, David L.

Holub, Richard A.


Kovacik, John R.

Manche, Alan

McDaniel, Roger D.

Pierce, James F.


Williams, David A.




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(1) General.


(1) All wiring methods permitted in 502.10(A).

(2) Rigid metal conduit (RMC), intermediate metal conduit (IMC), with listed threaded or threadlessfittings.

(3) Electrical metallic tubing (EMT), or dusttight wireways

(4) Type MCMV, TC, or TC-ER cable, including installation in cable tray systems. The cable shall beterminated with listed fittings.




(8) Listed reinforced thermosetting resin conduit (RTRC), factory elbows, and associated fittings, allmarked with suffix -XW





(13) Cablebus.

(14) In industrial establishments with restricted public access, where the conditions of maintenance andsupervision ensure that only qualified persons service the installation, listed Type P cable with orwithout metal braid armor , with an overall jacket, terminated with listed fittings, and installed inaccordance with Article 337.

Informational Note: For information on construction, testing, and marking of Type P cable, seeANSI/UL 1309-2017, Marine Shipboard Cable.


CMP-6 adopted the language "Type P-HL" to include type-P with braided armor in Article 337.120. As 502.10(A) allows Type P-HL, there is no need to mention that cable construction in the Division 2 permissions. The Division 2 permission should more generically state "Type P" which would be inclusive of that with or without armor.

Related Item

• FR-8036




Street Address:


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(1) General.





(4) Type MCMV, TC, or TC-ER cable, including installation in cable tray systems. Type TC-ER cable shallinclude an equipment grounding conductor in addition to a drain wire that may be present. The cableshall be terminated with listed fittings.




(8) Listed reinforced thermosetting resin conduit (RTRC), factory elbows, and associated fittings, allmarked with suffix -XW





(13) Cablebus.

(14) In industrial establishments with restricted public access, where the conditions of maintenance andsupervision ensure that only qualified persons service the installation, listed Type P cable with orwithout metal braid armor, with an overall jacket, terminated with listed fittings, and installed inaccordance with Article 337.



The panel should adopt this new language so the TC-ER constructions also require a separate equipment grounding conductor, in addition to any drain wire that may be present. Recent evidence has shown that TC-ER cable constructions are being sold into the market with single pair construction with drain wire, 600V insulation, and with TC-ER marking. The drain wire cannot serve as the EGC as it is not connected at both ends.

Related Item

• FR-7668




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(1) General.





(4) Type MCMV, TC, or TC-ER cable, including installation in cable tray systems. The cable shall beterminated with listed fittings.




a. Listed reinforced thermosetting resin conduit (RTRC), factory elbows, and associated fittings, allmarked with suffix -XW

b. PVC-coated rigid metal conduit (RMC), factory elbows, and associated fittings

c. PVC-coated intermediate metal conduit (IMC), factory elbows, and associated fittings

d. In industrial establishments with restricted public access, where the conditions of maintenanceand supervision ensure that only qualified persons service the installation, Schedule 80 PVCconduit, factory elbows, and associated fittings

(8) Optical fiber cable Types OFNP, OFCP, OFNR, OFCR, OFNG, OFCG, OFN, and OFC shall bepermitted to be installed in cable trays or any other raceway in accordance with 502.10(B). Opticalfiber cables shall be sealed in accordance with 502.15.

(9) Cablebus.

(10) In industrial establishments with restricted public access, where the conditions of maintenance andsupervision ensure that only qualified persons service the installation, listed Type P cable with orwithout metal braid armor, with an overall jacket, terminated with listed fittings, and installed inaccordance with Article 337.




CN_133.pdf 70_CN133





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Ballot Results





Dressman, Kevin L.

Hickman, Palmer L.

Hittinger, David L.

Holub, Richard A.


Kovacik, John R.

Manche, Alan

McDaniel, Roger D.

Pierce, James F.


Williams, David A.




Page 122 of 262


(5) Connections.

To facilitate replacements, process control instruments shall be permitted to be connected through flexiblecord, attachment plug, and receptacle, provided that all of the following conditions apply:

(1) Attachment plug and receptacle are listed for use in Class II, Division 2 locations, and listed for usewith flexible cords.

Exception No. 1: A Class II, Division 2 listing is not required if the circuit involves only nonincendivefield wiring.

Exception No. 2: In industrial establishments where the conditions of maintenance and supervisionensure that only qualified individuals service the installation, the Class II, Division 2 listing is notrequired when the requirements of list items 502.150(B)(5)(2), (B)(5)(3), and (B)(5)(4) are satisfiedand the receptacle carries a label warning against plugging or unplugging when energized.

(2) The flexible cord does not exceed 900 mm (3 ft), is of a type listed for extra-hard usage, or if listed forhard usage is protected by location.

(3) Only necessary receptacles are provided.

(4) Unless the attachment plug and receptacle are interlocked mechanically or electrically, or otherwisedesigned so that they cannot be separated when the contacts are energized, and the contacts cannotbe energized when the plug and socket outlet are separated, a switch complying with 502.115(B) shallbe provided so that the attachment plug or receptacle is not depended on to interrupt current.

Exception: The switch shall not be required if the circuit is nonincendive field wiring.


502.150 (B) (5) Connections; Already allows for connections by means of attachment plug and receptacle in all types of facilities, the new exception (2) for industrial establishments that deletes the requirement for a Class II Division II location based on a warning label to disconnect the power that is still required by (B) (5)(4) to be mechanically or electrically locked to prevent the contacts from being disconnected when energized only reduces the level of safety due to deleting the requirements for the attachment plug and receptacle being listed for a Class II Division II location. This is still a Classified Location and the hazards still exists and is addressed in (B) (5) (4).

Related Item

• FR7858


Submitter Full Name: Haywood Kines

Organization: Prince William County Building

Affiliation: Haywood Kines

Street Address:

City:

State:

Zip:


Committee: NEC-P14


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I, Haywood Kines, hereby irrevocably grant and assign to the National Fire Protection Association (NFPA) all and full rights in copyright inthis Public Comment (including both the Proposed Change and the Statement of Problem and Substantiation). I understand and intend thatI acquire no rights, including rights as a joint author, in any publication of the NFPA in which this Public Comment in this or another similaror derivative form is used. I hereby warrant that I am the author of this Public Comment and that I have full power and authority to enterinto this copyright assignment.

By checking this box I affirm that I am Haywood Kines, and I agree to be legally bound by the above Copyright Assignment and theterms and conditions contained therein. I understand and intend that, by checking this box, I am creating an electronic signature that will,upon my submission of this form, have the same legal force and effect as a handwritten signature


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(1) General.

In Class III, Division 1 locations, the following wiring methods shall be permitted:

(1) Rigid metal conduit (RMC), Type PVC conduit, Type RTRC conduit, intermediate metal conduit (IMC),electrical metallic tubing (EMT), dusttight wireways, or Type MC or MI cable with listed terminationfittings.



(4) Type MV, TC, or TC-ER cable, including installation in cable tray systems. Type TC-ER cable shallinclude an equipment grounding conductor in addition to a drain wire that may be present. The cableshall be terminated with listed fittings.

(5) Cablebus.


The panel should adopt this language so the TC-ER constructions also require a separate equipment grounding conductor, in addition to any drain wire that may be present. Recent evidence has shown that TC-ER cable constructions are being sold into the market with single pair construction with drain wire, 600V insulation, and with TC-ER marking. The drain wire cannot serve as the EGC as it is not connected at both ends.

Related Item

• FR-7681




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Public Comment No. 352-NFPA 70-2018 [ Section No. 503.130(D) ]

(D) Portable Lighting Equipment.

Portable lighting equipment shall be equipped with handles and protected with substantial guards.Lampholders shall be of the unswitched type with no provision for receiving attachment plugs. There shallbe no exposed current-carrying metal parts, and all exposed non–current-carrying metal parts shall begrounded connected to the circuit equipment grounding conductor . In all other respects, portable lightingequipment shall comply with 503.130(A).


The title improperly uses the term "Grounding", when the proper term is "Equipment Grounding Conductor."

The rule requires "All metal shields, boxes, receptacle housings, and self-contained devices shall be electrically continuous to the equipment grounding conductor of the supplying branch circuit." It does not relate to connecting these parts to the earth.

The definition of "Grounding" (Article 100) is the 'connection to ground' and the definition of 'Ground' (Article 100) is 'The Earth.' So grounding is the connection to the earth.

See FR-8115-NFPA 70-2018 where Code Panel 5 revised the title from ‘Grounding’ to ‘Equipment Grounding Conductor’ in 250.148(B). A similar revision here would serve to maintain consistency where applicable throughout the code.

Related Item

• FR-8115


Submitter Full Name: Mike Holt

Organization: Mike Holt Enterprises Inc

Street Address:

City:

State:

Zip:


Committee: NEC-P14


I, Mike Holt, hereby irrevocably grant and assign to the National Fire Protection Association (NFPA) all and full rights in copyright in thisPublic Comment (including both the Proposed Change and the Statement of Problem and Substantiation). I understand and intend that Iacquire no rights, including rights as a joint author, in any publication of the NFPA in which this Public Comment in this or another similar orderivative form is used. I hereby warrant that I am the author of this Public Comment and that I have full power and authority to enter intothis copyright assignment.

By checking this box I affirm that I am Mike Holt, and I agree to be legally bound by the above Copyright Assignment and the terms andconditions contained therein. I understand and intend that, by checking this box, I am creating an electronic signature that will, upon mysubmission of this form, have the same legal force and effect as a handwritten signature


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(2) Within Enclosures.

Conductors of intrinsically safe circuits shall be secured so that any conductor that might come loose from aterminal is unlikely to come into contact with another terminal. The conductors shall be separated fromconductors of nonintrinsically safe circuits by one of the methods in (1) through (4).

(1) Separation by at least 50 mm (2 in.) from conductors of any nonintrinsically safe circuits

(2) Separation from conductors of nonintrinsically safe circuits by use of a grounded metal partition0.91 mm (0.0359 in.) or thicker

(3) Separation from conductors of nonintrinsically safe circuits by use of an approved insulating partitionthat extends to within 1.5 mm (0.0625 in.) of the enclosure walls

(4) Where either (1) all of the intrinsically safe circuit conductors or (2) all of the nonintrinsically safe circuitconductors are contained in grounded metal-sheathed or metal , metal -clad cables where thesheathing or cladding is capable of carrying fault current to ground , or armor cables

Informational Note No. 1: Cables meeting the requirements of Articles 330 320, 330, and 332 aretypical of those considered acceptable.

Informational Note No. 2: The use of separate wiring compartments for the intrinsically safe andnonintrinsically safe terminals is a typical method of complying with this requirement.

Informational Note No. 3: Physical barriers such as grounded metal partitions or approved insulatingpartitions or approved restricted access wiring ducts separated from other such ducts by at least19 mm (3⁄4 in.) can be used to help ensure the required separation of the wiring.


Revised the text to make it clear that Typa AC Armor Cable, Type MC Metal-Clad, and and MI Metal-Sheath cables are suitable. No need to get into the 'grounding' issue. If any of these cables are installed, they all will automatically be 'grounded' (actually connected to the circuit equipment grounding conductor.

Related Item

• PI 1996




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Committee: NEC-P14





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(3) Other (Not in Raceway or Cable Tray Systems).

Conductors and cables of intrinsically safe circuits run in other than raceway or cable tray systems shall beseparated by at least 50 mm (2 in.) and secured from conductors and cables of any nonintrinsically safecircuits.

Exception: Where either (1) all of the intrinsically safe circuit conductors are in Type MI or MC cables or(2) all of the nonintrinsically safe circuit conductors are in raceways or Type MI or MC cables where thesheathing or cladding is capable of carrying fault current to ground .


Remove the words 'to the earth.' Fault current does not travel to the earth, it travels to the source via the effective ground-fault current path. Remove these words makes the Code a little more correct. See 250.4(A)(5).

Related Item

• PI-1997




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(A) Documentation for Industrial Occupancies.

All areas in industrial occupancies designated as hazardous (classified) locations shall be properlydocumented. This documentation shall be available to those authorized to design, install, inspect, maintain,or operate electrical equipment at the location.

Informational Note No. 1: For examples of area classification drawings, see ANSI/API RP505-1997 2018 , Recommended Practice for Classification of Locations for Electrical Installations atPetroleum Facilities Classified as Class I, Zone 0, Zone 1, or Zone 2; ANSI/ISA-60079-10-1(12.24.01)-2014 Explosive Atmospheres — Part 10-1: Classification of Areas — Explosive gasatmospheres; and Model Code of Safe Practice, Part 15: Area Classification Code for InstallationsHandling Flammable Fluids, EI 15:2015, Energy Institute, London.

Informational Note No. 2: Where gas detection equipment is used as a means of protection inaccordance with 505.8(I)(1), (I)(2), or (I)(3), the documentation typically includes the type ofdetection equipment, its listing, installation location(s), alarm and shutdown criteria, and calibrationfrequency.


Comment updates the release date of RP 505 to 2018.

Related Item

• PI 3261


Submitter Full Name: Mark Goodman

Organization: Mark Goodman Electrical Consul

Affiliation: American Petroleum Institute

Street Address:

City:

State:

Zip:


Committee: NEC-P14


I, Mark Goodman, hereby irrevocably grant and assign to the National Fire Protection Association (NFPA) all and full rights in copyright inthis Public Comment (including both the Proposed Change and the Statement of Problem and Substantiation). I understand and intend thatI acquire no rights, including rights as a joint author, in any publication of the NFPA in which this Public Comment in this or another similaror derivative form is used. I hereby warrant that I am the author of this Public Comment and that I have full power and authority to enterinto this copyright assignment.

By checking this box I affirm that I am Mark Goodman, and I agree to be legally bound by the above Copyright Assignment and theterms and conditions contained therein. I understand and intend that, by checking this box, I am creating an electronic signature that will,upon my submission of this form, have the same legal force and effect as a handwritten signature


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Informational Note No. 1: It is important that the authority having jurisdiction be familiar withrecorded industrial experience as well as with standards of the National Fire Protection Association(NFPA), the American Petroleum Institute (API), the International Society of Automation (ISA), andthe International Electrotechnical Commission (IEC) that may be of use in the classification ofvarious locations, the determination of adequate ventilation, and the protection against staticelectricity and lightning hazards.

Informational Note No. 2: For further information on the classification of locations, see NFPA497-2017, Recommended Practice for the Classification of Flammable Liquids, Gases, or Vaporsand of Hazardous (Classified) Locations for Electrical Installations in Chemical Process Areas;ANSI/API RP 505-1997, Recommended Practice for Classification of Locations for ElectricalInstallations at Petroleum Facilities Classified as Class I, Zone 0, Zone 1, or Zone 2; ANSI/ISA-60079-10-1 (12.24.01)-2014, Explosive Atmospheres — Part 10-1: Classification of Areas —Explosive gas atmospheres; and Model Code of Safe Practice, Part 15: Area Classification Code forInstallations Handling Flammable Fluids, EI 15:2015, Energy Institute, London.


Informational Note No. 4: For further information on ventilation, see NFPA 30-2018, Flammable andCombustible Liquids Code, and ANSI/API RP 505-1997, Recommended Practice for Classificationof Locations for Electrical Installations at Petroleum Facilities Classified as Class I, Zone 0, Zone 1,or Zone 2.

Informational Note No. 5: For further information on electrical systems for hazardous (classified)locations on offshore oil and gas producing platforms, drilling rigs, and workover rigs, see ANSI/APIRP 14FZ-2013, Recommended Practice for Design and Installation of Electrical Systems for Fixedand Floating Offshore Petroleum Facilities for Unclassified and Class I, Zone 0, Zone 1, and Zone2 Locations.

Informational Note No. 6: For further information on application of electrical equipment in hazardous(classified) locations in general, see ANSI/ISA-60079-0 (12.00.01)-2013, Explosive Atmospheres —Part 0: Equipment — General Requirements; ANSI/ISA-12.01.01-2013, Definitions and InformationPertaining to Electrical Apparatus in Hazardous (Classified) Locations; and ANSI/UL 60079-0:2013,Electrical Apparatus for Explosive Gas Atmospheres — Part 0: General Requirements.

Informational Note No. 7: Portable or transportable equipment having self-contained powersupplies, such as battery-operated equipment, could potentially become an ignition source inhazardous (classified) locations. See ANSI/UL 121203-2011, Standard for Portable ElectronicProducts Suitable for Use in Class I and II, Division 2, Class I Zone 2 and Class III, Division 1 and 2Hazardous (Classified) Locations.

Informational Note No. 8: For additional information concerning the installation of equipment utilizingoptical emissions technology (such as laser equipment) that could potentially become an ignitionsource in hazardous (classified) locations, see ANSI/UL-60079-28-2017, Explosive Atmospheres —Part 28: Protection of equipment and transmission systems using optical radiation.

Informational Note No. 9: For information on electrical resistance trace heating for hazardous(classified) locations, see ANSI/IEEE 60079-30-2:2015, IEEE/IEC International Standard forExplosive Atmospheres — Part 30-2: Electrical resistance trace heating — Application guide fordesign, installation and maintenance.

Informational Note No. 10: For information on electric skin effect trace heating for hazardous(classified) locations, ANSI/IEEE 844.2/CSA C293.2:2017, Standard for Skin Effect Trace Heatingof Pipelines, Vessels, Equipment, and Structures — Application Guide for Design, Installation,Testing, Commissioning, and Maintenance.



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CN_98.pdf 70_CN98



The Correlating Committee directs that this First Revision be reviewed for compliance of section 1.3 and 3.1.3 of the NEC Style Manual. Section 505.4(B) shall be written in Code language using mandatory terms. The informational notes contained within this section shall follow the rule to which they apply. It is unclear the rules to which Informational Notes 1 through 10 apply.This action will be considered as a Public Comment.

Related Item





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CommitteeStatement:

The Correlating Committee directs that this First Revision be reviewed for compliance ofsection 1.3 and 3.1.3 of the NEC Style Manual. Section 505.4(B) shall be written in Codelanguage using mandatory terms. The informational notes contained within this section shallfollow the rule to which they apply. It is unclear the rules to which Informational Notes 1through 10 apply. This action will be considered as a Public Comment.

First Revision No. 7794-NFPA 70-2018 [Section No. 505.4(B)]

Ballot Results





Dressman, Kevin L.

Hickman, Palmer L.

Hittinger, David L.

Holub, Richard A.


Kovacik, John R.

Manche, Alan

McDaniel, Roger D.

Pierce, James F.


Williams, David A.


Page 133 of 262




Informational Note No. 1: It is important that the authority having jurisdiction be familiar with recordedindustrial experience as well as with standards of the National Fire Protection Association (NFPA),the American Petroleum Institute (API), the International Society of Automation (ISA), and theInternational Electrotechnical Commission (IEC) that may be of use in the classification of variouslocations, the determination of adequate ventilation, and the protection against static electricity andlightning hazards.

Informational Note No. 2: For further information on the classification of locations, see NFPA497-2017, Recommended Practice for the Classification of Flammable Liquids, Gases, or Vaporsand of Hazardous (Classified) Locations for Electrical Installations in Chemical Process Areas;ANSI/API RP 505-1997 2018 , Recommended Practice for Classification of Locations for ElectricalInstallations at Petroleum Facilities Classified as Class I, Zone 0, Zone 1, or Zone 2; ANSI/ISA-60079-10-1 (12.24.01)-2014, Explosive Atmospheres — Part 10-1: Classification of Areas —Explosive gas atmospheres; and Model Code of Safe Practice, Part 15: Area Classification Code forInstallations Handling Flammable Fluids, EI 15:2015, Energy Institute, London.


Informational Note No. 4: For further information on ventilation, see NFPA 30-2018, Flammable andCombustible Liquids Code, and ANSI/API RP 505-1997 2018 , Recommended Practice forClassification of Locations for Electrical Installations at Petroleum Facilities Classified as Class I,Zone 0, Zone 1, or Zone 2.

Informational Note No. 5: For further information on electrical systems for hazardous (classified)locations on offshore oil and gas producing platforms, drilling rigs, and workover rigs, see ANSI/APIRP 14FZ-2013, Recommended Practice for Design and Installation of Electrical Systems for Fixedand Floating Offshore Petroleum Facilities for Unclassified and Class I, Zone 0, Zone 1, and Zone2 Locations.

Informational Note No. 6: For further information on application of electrical equipment in hazardous(classified) locations in general, see ANSI/ISA-60079-0 (12.00.01)-2013, Explosive Atmospheres —Part 0: Equipment — General Requirements; ANSI/ISA-12.01.01-2013, Definitions and InformationPertaining to Electrical Apparatus in Hazardous (Classified) Locations; and ANSI/UL 60079-0:2013,Electrical Apparatus for Explosive Gas Atmospheres — Part 0: General Requirements.

Informational Note No. 7: Portable or transportable equipment having self-contained power supplies,such as battery-operated equipment, could potentially become an ignition source in hazardous(classified) locations. See ANSI/UL 121203-2011, Standard for Portable Electronic Products Suitablefor Use in Class I and II, Division 2, Class I Zone 2 and Class III, Division 1 and 2 Hazardous(Classified) Locations.

Informational Note No. 8: For additional information concerning the installation of equipment utilizingoptical emissions technology (such as laser equipment) that could potentially become an ignitionsource in hazardous (classified) locations, see ANSI/UL-60079-28-2017, Explosive Atmospheres —Part 28: Protection of equipment and transmission systems using optical radiation.

Informational Note No. 9: For information on electrical resistance trace heating for hazardous(classified) locations, see ANSI/IEEE 60079-30-2:2015, IEEE/IEC International Standard forExplosive Atmospheres — Part 30-2: Electrical resistance trace heating — Application guide fordesign, installation and maintenance.

Informational Note No. 10: For information on electric skin effect trace heating for hazardous(classified) locations, ANSI/IEEE 844.2/CSA C293.2:2017, Standard for Skin Effect Trace Heating ofPipelines, Vessels, Equipment, and Structures — Application Guide for Design, Installation, Testing,Commissioning, and Maintenance.



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The comment updates the release date of RP 505 in Informational Notes No. 2 and No. 4.

Related Item

• PI 3264 and PI 3266





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City:

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Committee: NEC-P14





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(A) General.

Locations shall be classified depending on the properties of the flammable gases, flammable liquid–produced vapors, combustible liquid–produced vapors, combustible dusts, or fibers/flyings that could bepresent and the likelihood that a flammable or combustible concentration or quantity is present. Each room,section, or area shall be considered individually in determining its classification. Where pyrophoric materialsare the only materials used or handled, these locations are outside the scope of this article.

Informational Note No. 1: See 505.7 for restrictions on area classification.

Informational Note No. 2: Through the exercise of ingenuity in the layout of electrical installations forhazardous (classified) locations, it is frequently possible to locate much of the equipment in reducedlevel of classification or in an unclassified location and, thus, to reduce the amount of specialequipment required.

Refrigerant machinery rooms that contain ammonia refrigeration systems and are equipped with adequatemechanical ventilation that operates continuously or is initiated by a detection system at a concentration notexceeding 150 ppm shall be permitted to be classified as “unclassified” locations.

Informational Note: For further information regarding classification and ventilation of areas involvingclosed-circuit ammonia refrigeration systems, see ANSI/ASHRAE 15-2016, Designation and SafetyClassification of Refrigerants , and ANSI/ IIAR 2-2014, Standard for Safe Design of Closed-CircuitAmmonia Refrigeration Systems.


As of Addendum A to the 2016 edition of ASHRAE 15, ASHRAE 15 no longer includes requirements for ammonia refrigeration. It now defers to IIAR 2, which is the recognized ANSI standard for ammonia refrigeration and addresses electrical classification of areas with ammonia refrigeration systems.





Related Item

• FR7796


Submitter Full Name: Jeffrey Shapiro

Organization: International Code Consultants

Affiliation: International Institute of Ammonia Refrigeration

Street Address:

City:

State:

Zip:

Submittal Date: Thu Jun 28 00:08:46 EDT 2018

Committee: NEC-P14


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I, Jeffrey Shapiro, hereby irrevocably grant and assign to the National Fire Protection Association (NFPA) all and full rights in copyright inthis Public Comment (including both the Proposed Change and the Statement of Problem and Substantiation). I understand and intend thatI acquire no rights, including rights as a joint author, in any publication of the NFPA in which this Public Comment in this or another similaror derivative form is used. I hereby warrant that I am the author of this Public Comment and that I have full power and authority to enterinto this copyright assignment.

By checking this box I affirm that I am Jeffrey Shapiro, and I agree to be legally bound by the above Copyright Assignment and theterms and conditions contained therein. I understand and intend that, by checking this box, I am creating an electronic signature that will,upon my submission of this form, have the same legal force and effect as a handwritten signature


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(1) Zone 0.

A Zone 0 location is a location in which one of the following conditions exists:

(1) Ignitible concentrations of flammable gases or vapors are present continuously

(2) Ignitible concentrations of flammable gases or vapors are present for long periods of time

Informational Note No. 1: As a guide in determining when flammable gases or vapors are presentcontinuously or for long periods of time, refer to ANSI/API RP 505-1997 2018 , RecommendedPractice for Classification of Locations for Electrical Installations of Petroleum Facilities Classified asClass I, Zone 0, Zone 1 or Zone 2; ANSI/ISA 60079-10-1-2014, Explosive Atmospheres —Part 10-1: Classification of Areas — explosive gas atmospheres.

Informational Note No. 2: This classification includes locations inside vented tanks or vessels thatcontain volatile flammable liquids; inside inadequately vented spraying or coating enclosures wherevolatile flammable solvents are used; between the inner and outer roof sections of a floating rooftank containing volatile flammable liquids; inside open vessels, tanks, and pits containing volatileflammable liquids; the interior of an exhaust duct that is used to vent ignitible concentrations ofgases or vapors; and inside inadequately ventilated enclosures that contain normally ventinginstruments utilizing or analyzing flammable fluids and venting to the inside of the enclosures.


The Comment updates the release date of RP 505.

Related Item

• PI 3668





Street Address:

City:

State:

Zip:


Committee: NEC-P14





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Public Comment No. 1045-NFPA 70-2018 [ Sections 505.8(A), 505.8(B) ]

Sections 505.8(A), 505.8(B)

(A) Flameproof Enclosure “d”.

This protection technique shall be permitted for equipment in Zone 1 or Zone 2 locations.

Informational Note: See Table 505.9(C)(2)(4) for descriptions of subdivisions of protection byflameproof enclosure “d”.

(B) Pressurized Enclosure “p”.

This protection technique shall be permitted for equipment in those Zone 1 or Zone 2 locations for which itis identified.

Informational Note: See Table 505.9(C)(2)(4) for descriptions of subdivisions of protection bypressurized enclosure “p”.



CN_101.pdf 70_CN101



The Correlating Committee directs that this First Revision be reconsidered. There is significant duplication of material in both the informational notes and in the Table that reduces the usability of these sections. A single informational note to the Table may be more appropriately located in the parent text.This action will be considered as a public comment.

Related Item





Street Address:

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Committee: NEC-P14





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Correlating Committee Note No. 101-NFPA 70-2018 [ Sections 505.8(A), 505.8(B)

]



Committee Statement

CommitteeStatement:

The Correlating Committee directs that this First Revision be reconsidered. There issignificant duplication of material in both the informational notes and in the Table that reducesthe usability of these sections. A single informational note to the Table may be moreappropriately located in the parent text. This action will be considered as a public comment.

First Revision No. 7801-NFPA 70-2018 [Sections 505.8(A), 505.8(B)]

Ballot Results





Dressman, Kevin L.

Hickman, Palmer L.

Hittinger, David L.

Holub, Richard A.


Kovacik, John R.

Manche, Alan

McDaniel, Roger D.

Pierce, James F.


Williams, David A.


Page 140 of 262

Public Comment No. 1044-NFPA 70-2018 [ Section No. 505.8(C) ]

(C) Intrinsic Safety “i”.

This protection technique shall be permitted for apparatus and associated apparatus for Zone 0, Zone 1, orZone 2 locations for which it is listed.

Informational Note: See Table 505.9(C)(2)(4) for descriptions of subdivisions of protection byintrinsic safety “i”.



CN_103.pdf 70_CN103




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Street Address:

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Zip:


Committee: NEC-P14





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Correlating Committee Note No. 103-NFPA 70-2018 [ Section No. 505.8(C) ]




CommitteeStatement:


First Revision No. 7804-NFPA 70-2018 [Section No. 505.8(C)]

Ballot Results





Dressman, Kevin L.

Hickman, Palmer L.

Hittinger, David L.

Holub, Richard A.


Kovacik, John R.

Manche, Alan

McDaniel, Roger D.

Pierce, James F.


Williams, David A.


Page 142 of 262

Public Comment No. 1043-NFPA 70-2018 [ Section No. 505.8(E) ]

(E) Liquid Immersion “o”.


Informational Note: See Table 505.9(C)(2)(4) for descriptions of subdivisions of protection by liquidimmersion “o”.



CN_104.pdf 70_CN104




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Street Address:

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Committee: NEC-P14





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Correlating Committee Note No. 104-NFPA 70-2018 [ Section No. 505.8(E) ]




CommitteeStatement:


First Revision No. 7809-NFPA 70-2018 [Section No. 505.8(E)]

Ballot Results





Dressman, Kevin L.

Hickman, Palmer L.

Hittinger, David L.

Holub, Richard A.


Kovacik, John R.

Manche, Alan

McDaniel, Roger D.

Pierce, James F.


Williams, David A.


Page 144 of 262

Public Comment No. 1042-NFPA 70-2018 [ Sections 505.8(F), 505.8(G), 505.8(H) ]

Sections 505.8(F), 505.8(G), 505.8(H)

(F) Increased Safety “e”.


Informational Note: See Table 505.9(C)(2)(4) for descriptions of subdivisions of protection byincreased safety “e”.

(G) Encapsulation “m”.

This protection technique shall be permitted for equipment in Zone 0, Zone 1, or Zone 2 locations for whichit is identified.

Informational Note: See Table 505.9(C)(2)(4) for the descriptions of subdivisions for encapsulation“m”.

(H) Powder Filling “q”.


Informational Note: See Table 505.9(C)(2)(4) for descriptions of subdivisions of protection bypowder filling “q”.



CN_106.pdf 70_CN106




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Committee: NEC-P14


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Correlating Committee Note No. 106-NFPA 70-2018 [ Sections

505.8(F), 505.8(G), 505.8(H) ]




CommitteeStatement:


First Revision No. 7884-NFPA 70-2018 [Sections 505.8(F), 505.8(G), 505.8(H)]

Ballot Results





Dressman, Kevin L.

Hickman, Palmer L.

Hittinger, David L.

Holub, Richard A.


Kovacik, John R.

Manche, Alan

McDaniel, Roger D.

Pierce, James F.


Williams, David A.


Page 147 of 262

Public Comment No. 1040-NFPA 70-2018 [ Section No. 505.8(I) ]

(I) Combustible Gas Detection System.

A combustible gas detection system shall be permitted as a means of protection in industrialestablishments with restricted public access and where the conditions of maintenance and supervisionensure that only qualified persons service the installation.

Any gas detection system utilized as a protection technique shall meet all of the following requirements:

(1) The gas detection equipment used shall be listed for Zone 1 and listed for the detection of the specificgas or vapor to be encountered.

(2) The gas detection system shall not utilize portable or transportable equipment, or temporary wiringmethods.

(3) The gas detection system shall only use point-type sensors. The system shall be permitted to beaugmented with open-path (line-of-sight)–type sensors, but open-path type sensors shall not be thebasis for this protection technique.

(4) The type of detection equipment, its listing, installation location(s), alarm and shutdown criteria, andcalibration frequency shall be documented where combustible gas detectors are used as a protectiontechnique.

(5) The applications for the use of combustible gas detection systems as a protection technique shall belimited to 505.8(I)(1), (I)(2), or (I)(3).

Informational Note No. 1: For further information, see ANSI/ISA-TR12.13.03-2009, Guide forCombustible Gas Detection as a Method of Protection.

Informational Note No. 2: For further information, see ANSI/ISA-60079-29-1 (12.13.01)-2013,Explosive Atmospheres — Part 29-1: Gas detectors — Performance requirements of detectors forflammable gases.

Informational Note No. 3: For further information, see ANSI/API RP 505-1997, RecommendedPractice for Classification of Locations for Electrical Installations at Petroleum Facilities Classifiedas Class I, Zone 0, Zone 1, and Zone 2.

Informational Note No. 4: For further information, see ANSI/ISA-60079-29-2-2012, ExplosiveAtmospheres — Part 29-2: Gas detectors — Selection, installation, use and maintenance ofdetectors for flammable gases and oxygen.

(1) Inadequate Ventilation.

A location, enclosed space, or building that is classified as a Zone 1 location due to inadequate ventilation,that is provided with a combustible gas detection system will be allowed to utilize electrical equipment,installation methods, and wiring practices suitable for Zone 2 installations. Sensing a gas concentration ofnot more than 40 percent of the lower flammable limit or a gas detector system malfunction shall activatean alarm (audible or visual, or both, as most appropriate for the area).


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(2) Interior of a Building.

Any building or enclosure that does not contain a source of flammable gas or vapors that is located in, orwith an opening into, a Zone 2 hazardous (classified) location that is provided with a combustible gasdetection system will be permitted to utilize electrical equipment, installation methods, and wiring practicessuitable for unclassified installations under the following conditions:

(1) An alarm (audible or visual, or both) shall be sounded at not more than 20 percent of the lowerflammable limit.

(2) Sensing a gas concentration of not more than 40 percent of the lower flammable limit or a gasdetector system malfunction shall both activate an alarm (audible or visual, or both, as mostappropriate for the area) and initiate automatic disconnection of power from all electrical devices in thearea that are not suitable for Zone 2.

(3) The power disconnecting device(s) shall be suitable for Zone 1 if located inside the building (or similararea). If the disconnecting device(s) is located outside the building (or similar area), it shall be suitablefor the area in which it is located.

Redundant or duplicate equipment (such as sensors) shall be permitted to be installed to avoiddisconnecting electrical power when equipment malfunctions are indicated.

When automatic shutdown could introduce additional or increased hazard, this technique shall not bepermitted.

(3) Interior of a Control Panel.

Inside the interior of a control panel containing instrumentation or other equipment utilizing or measuringflammable liquids, gases, or vapors, that is provided with combustible gas detection equipment will beallowed to utilize electrical equipment, installation methods, and wiring practices suitable for Zone 2installations.

An alarm (audible or visual, or both) shall be sounded at not more than 40 percent of the lower flammablelimit.



CN_102.pdf 70_CN102



The Correlating Committee directs the panel to review the numbering in subsection I for clarity and usability.This comment will be considered as a Public Comment.

Related Item





Street Address:

City:

State:

Zip:


Committee: NEC-P14


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Correlating Committee Note No. 102-NFPA 70-2018 [ Section No. 505.8(I) ]




CommitteeStatement:

The Correlating Committee directs the panel to review the numbering in subsection Ifor clarity and usability. This comment will be considered as a Public Comment.

First Revision No. 7821-NFPA 70-2018 [Section No. 505.8(I)]

Ballot Results





Dressman, Kevin L.

Hickman, Palmer L.

Hittinger, David L.

Holub, Richard A.


Kovacik, John R.

Manche, Alan

McDaniel, Roger D.

Pierce, James F.


Williams, David A.


Page 151 of 262


(I) Combustible Gas Detection System.

A combustible gas detection system shall be permitted as a means of protection in industrialestablishments with restricted public access and where the conditions of maintenance and supervisionensure that only qualified persons service the installation.

Any gas detection system utilized as a protection technique shall meet all of the following requirements:

(1) The gas detection equipment used shall be listed for Zone 1 and listed for the detection of the specificgas or vapor to be encountered.

(2) The gas detection system shall not utilize portable or transportable equipment, or temporary wiringmethods.

(3) The gas detection system shall only use point-type sensors. The system shall be permitted to beaugmented with open-path (line-of-sight)–type sensors, but open-path type sensors shall not be thebasis for this protection technique.

(4) The type of detection equipment, its listing, installation location(s), alarm and shutdown criteria, andcalibration frequency shall be documented where combustible gas detectors are used as a protectiontechnique.

(5) The applications for the use of combustible gas detection systems as a protection technique shall belimited to 505.8(I)(1), (I)(2), or (I)(3).

Informational Note No. 1: For further information, see ANSI/ISA-TR12.13.03-2009, Guide forCombustible Gas Detection as a Method of Protection.

Informational Note No. 2: For further information, see ANSI/ISA-60079-29-1 (12.13.01)-2013,Explosive Atmospheres — Part 29-1: Gas detectors — Performance requirements of detectors forflammable gases.

Informational Note No. 3: For further information, see ANSI/API RP 505-1997 2018 , RecommendedPractice for Classification of Locations for Electrical Installations at Petroleum Facilities Classified asClass I, Zone 0, Zone 1, and Zone 2.

Informational Note No. 4: For further information, see ANSI/ISA-60079-29-2-2012, ExplosiveAtmospheres — Part 29-2: Gas detectors — Selection, installation, use and maintenance ofdetectors for flammable gases and oxygen.

(1) Inadequate Ventilation.

A location, enclosed space, or building that is classified as a Zone 1 location due to inadequate ventilation,that is provided with a combustible gas detection system will be allowed to utilize electrical equipment,installation methods, and wiring practices suitable for Zone 2 installations. Sensing a gas concentration ofnot more than 40 percent of the lower flammable limit or a gas detector system malfunction shall activatean alarm (audible or visual, or both, as most appropriate for the area).


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(2) Interior of a Building.

Any building or enclosure that does not contain a source of flammable gas or vapors that is located in, orwith an opening into, a Zone 2 hazardous (classified) location that is provided with a combustible gasdetection system will be permitted to utilize electrical equipment, installation methods, and wiring practicessuitable for unclassified installations under the following conditions:

(1) An alarm (audible or visual, or both) shall be sounded at not more than 20 percent of the lowerflammable limit.

(2) Sensing a gas concentration of not more than 40 percent of the lower flammable limit or a gasdetector system malfunction shall both activate an alarm (audible or visual, or both, as mostappropriate for the area) and initiate automatic disconnection of power from all electrical devices in thearea that are not suitable for Zone 2.

(3) The power disconnecting device(s) shall be suitable for Zone 1 if located inside the building (or similararea). If the disconnecting device(s) is located outside the building (or similar area), it shall be suitablefor the area in which it is located.

Redundant or duplicate equipment (such as sensors) shall be permitted to be installed to avoiddisconnecting electrical power when equipment malfunctions are indicated.

When automatic shutdown could introduce additional or increased hazard, this technique shall not bepermitted.

(3) Interior of a Control Panel.

Inside the interior of a control panel containing instrumentation or other equipment utilizing or measuringflammable liquids, gases, or vapors, that is provided with combustible gas detection equipment will beallowed to utilize electrical equipment, installation methods, and wiring practices suitable for Zone 2installations.

An alarm (audible or visual, or both) shall be sounded at not more than 40 percent of the lower flammablelimit.


The Comment updates the release date for RP 505 to 2018.

Related Item

• PI 3270





Street Address:

City:

State:

Zip:


Committee: NEC-P14





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Public Comment No. 1039-NFPA 70-2018 [ Section No. 505.8(J) ]

(J) Protection by Electrical Resistance Trace Heating “60079-30-1”.

This protection technique shall be permitted for electrical resistance trace heating equipment in Zone 1 orZone 2 for which it is listed.

Informational Note: See Table 505.9(C)(2)(4) for the description of permitted locations for ElectricalResistance Trace Heating “60079-30-1”.



CN_107.pdf 70_CN107




Related Item





Street Address:

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Zip:


Committee: NEC-P14





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Correlating Committee Note No. 107-NFPA 70-2018 [ New Section after 505.8(I) ]




CommitteeStatement:


First Revision No. 7812-NFPA 70-2018 [New Section after 505.8(I)]

Ballot Results





Dressman, Kevin L.

Hickman, Palmer L.

Hittinger, David L.

Holub, Richard A.


Kovacik, John R.

Manche, Alan

McDaniel, Roger D.

Pierce, James F.


Williams, David A.


Page 155 of 262

Public Comment No. 1038-NFPA 70-2018 [ Section No. 505.8(K) ]

(K) Inherently Safe Optical Radiation “op is”.

This protection technique shall be permitted for equipment in Zone 0, Zone 1, or Zone 2 locations for whichthe equipment is identified.

Informational Note: See Table 505.9(C)(2)(4) for a description of subdivisions of optical radiation.



CN_109.pdf 70_CN109




Related Item





Street Address:

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State:

Zip:


Committee: NEC-P14





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CommitteeStatement:



Ballot Results





Dressman, Kevin L.

Hickman, Palmer L.

Hittinger, David L.

Holub, Richard A.


Kovacik, John R.

Manche, Alan

McDaniel, Roger D.

Pierce, James F.


Williams, David A.


Page 157 of 262

Public Comment No. 15-NFPA 70-2018 [ Section No. 505.9(C)(1) ]

(1) Division Equipment.

Equipment identified for Class I, Division 1 or Class I, Division 2 shall, in addition to being marked inaccordance with 500.8(C), be permitted to be marked with all of the following:

(1) Class I, Zone 1 or Zone 1; Class I, Zone 2 or Zone 2 (as applicable)

(2) Applicable gas classification group(s) in accordance with Table 505.9(C)(1)(2)

(3) Temperature classification in accordance with 505.9(D)(1)

Table 505.9(C)(1)(2) Material Groups

Material Group Comment

IIC See 505.6(A)

IIB See 505.6(B)

IIA See 505.6(C)

Equipment Listed as Associated Intrinsically Safe or Nonincendive Field Wiring Apparatus NOTsuitable for installation in a hazardous (classified) location may be permitted to be marked <methodhere>.


Article 500.8(6)(c) requires Associated Apparatus/ Associated NIFW Apparatus to be marked with the Class, Division, and Group of the apparatus to which it is to be connected. When going to articles 505.9(C)(1) and 506.9(C)(1), there is no provision for alternate zone marking associated apparatus. Since this marking is required for Zones, it disallows Class/Div listed equipment from bearing the required alternate zones marks. 500.8(C) does allow this as a special allowance and therefore it should be eligible for the alternate zone markings described in 505.9(C)(1)



Public Comment No. 24-NFPA 70-2018 [Section No. 506.9(C)(1)]

Related Item

• PI




Street Address:

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Zip:


Committee: NEC-P14


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Public Comment No. 770-NFPA 70-2018 [ Section No. 505.9(G) ]

(G) Equipment Involving Optical Radiation.

For equipment involving sources of optical radiation (such as laser or LED sources) in the wavelengthrange from 380 nm to 10 μm, the risk of ignition from optical radiation shall be considered for all electricalparts and circuits that may be exposed to the radiation, both inside and outside the optical equipment. Thisincludes optical equipment, which itself is located outside the explosive atmosphere, but its emitted opticalradiation enters such atmospheres.

Informational Note: For additional information on types of protection that can be applied to minimizethe risk of ignition in explosive atmospheres from optical radiation, see ANSI/UL 60079-28-2017,Explosive Atmospheres — Part 28: Protection of Equipment and Transmission Systems UsingOptical Radiation.

Exception: All luminaires (fixed, portable, or transportable) and hand lights; intended to be supplied bymains (with or without galvanic isolation) or powered by batteries, with any continuous divergent lightsource, including LEDs.



CN_100.pdf 70_CN100



The Correlating Committee directs that this First Revision be reviewed for compliance with section 3.1.4.1 of the NEC Style Manual. The Exception is not written in a complete sentence and does not contain mandatory text.

This comment will be considered as a Public Comment.

Related Item




Organization: NEC CORRELATING COMMITTEE

Street Address:

City:

State:

Zip:


Committee: NEC-P14





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114 of 196 9/14/2018, 10:17 AM


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The Correlating Committee directs that this First Revision be reviewed for compliance with section 3.1.4.1 of the NEC Style Manual. The Exception is not written in a complete sentence and does not contain mandatory text.

This comment will be considered as a Public Comment.


Ballot Results





Dressman, Kevin L.

Hickman, Palmer L.

Hittinger, David L.

Holub, Richard A.


Kovacik, John R.

Manche, Alan

McDaniel, Roger D.

Pierce, James F.


Williams, David A.




Page 162 of 262

Public Comment No. 330-NFPA 70-2018 [ Section No. 505.15 ]

505.15 Wiring Methods.

Wiring methods shall maintain the integrity of protection techniques and shall comply with 505.15(A)through (C).

(A) Zone 0.

In Zone 0 locations, equipment protected by intrinsic safety “ia” and equipment protected by encapsulation“ma” shall be connected using intrinsically safe “ia” circuits with wiring methods in accordance withArticle 504.

(B) Zone 1.


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(1) General.

In Zone 1 locations, the following wiring methods shall be permitted:

(1) All wiring methods permitted by 505.15(A).

(2) In industrial establishments with restricted public access, where the conditions of maintenance andsupervision ensure that only qualified persons service the installation, and where the cable is notsubject to physical damage, Type MC-HL cable listed for use in Zone 1 or Class I, Division 1 locations,with a gas/vaportight continuous corrugated metallic sheath, an overall jacket of suitable polymericmaterial, and a separate equipment grounding conductor(s) in accordance with 250.122, andterminated with fittings listed for the application. Type MC-HL cable shall be installed in accordancewith the provisions of Article 330, Part II.

(3) In industrial establishments with restricted public access, where the conditions of maintenance andsupervision ensure that only qualified persons service the installation, and where the cable is notsubject to physical damage, Type ITC-HL cable listed for use in Zone 1 or Class I, Division 1 locations,with a gas/vaportight continuous corrugated metallic sheath and an overall jacket of suitable polymericmaterial, and terminated with fittings listed for the application. Type ITC-HL cable shall be installed inaccordance with the provisions of Article 727.

Informational Note: See 727.4 and 727.5 for restrictions on use of Type ITC cable.

(4) Type MI cable terminated with fittings listed for Zone 1 or Class I, Division 1 locations. Type MI cableshall be installed and supported in a manner to avoid tensile stress at the termination fittings.

(5) Threaded rigid metal conduit, or threaded steel intermediate metal conduit.

(6) Type PVC conduit and Type RTRC conduit shall be permitted where encased in a concrete envelope aminimum of 50 mm (2 in.) thick and provided with not less than 600 mm (24 in.) of cover measuredfrom the top of the conduit to grade. Threaded rigid metal conduit or threaded steel intermediate metalconduit shall be used for the last 600 mm (24 in.) of the underground run to emergence or to the pointof connection to the aboveground raceway. An equipment grounding conductor shall be included toprovide for electrical continuity of the raceway system and for grounding of non–current-carrying metalparts.

(7) Intrinsic safety type of protection “ib” shall be permitted using the wiring methods specified 504.20.

(8) Optical fiber cable Types OFNP, OFCP, OFNR, OFCR, OFNG, OFCG, OFN, and OFC shall bepermitted to be installed in raceways in accordance with 505.15(B). Optical fiber cable shall be sealedin accordance with 505.16.

(9) In industrial establishments with restricted public access, where the conditions of maintenance andsupervision ensure that only qualified persons service the installation, for applications limited to600 volts nominal or less, and where the cable is not subject to physical damage and terminated withfittings listed for the location, Type TC-ER-HL cable shall be listed for use in Class I, Division 1 or Zone1 locations and shall be installed in accordance with 336.10, including the restrictions of 336.10(7).


(10) In industrial establishments with restricted public access, where the conditions of maintenance andsupervision ensure that only qualified persons service the installation, listed Type P cable with metalbraid armor, with an overall jacket, and terminated with fittings listed for the location, and installed inaccordance with Article 337.




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(2) Flexible cord in accordance with 505.17(A), terminated cord connectors listed for the location.






(C) Zone 2.


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(1) General.


(1) All wiring methods permitted by 505.15(B).

(2) Types MC, MV, TC, or TC-ER cable, including installation in cable tray systems. The cable shall beterminated with listed fittings. Single conductor Type MV cables shall be shielded or metallic-armored.

(3) Type ITC and Type ITC-ER cable as permitted in 727.4 and terminated with listed fittings. Type ITC-ERshall include a separate insulated equipment grounding conductor in addition to a drain wire.

(4) Type PLTC and Type PLTC-ER cable in accordance with the provisions of Article 725, includinginstallation in cable tray systems. The cable shall be terminated with listed fittings. Type PLTC-ER shallinclude a separate insulated equipment grounding conductor in addition to a drain wire.

(5) Enclosed gasketed busways, enclosed gasketed wireways.

(6) In industrial establishments with restricted public access, where the conditions of maintenance andsupervision ensure that only qualified persons service the installation, and where metallic conduit doesnot provide sufficient corrosion resistance, listed reinforced thermosetting resin conduit (RTRC), factoryelbows, and associated fittings, all marked with the suffix -XW, and Schedule 80 PVC conduit, factoryelbows, and associated fittings shall be permitted. Where seals are required for boundary conditions asdefined in 505.16(C)(1)(b), the Zone 1 wiring method shall extend into the Zone 2 area to the seal,which shall be located on the Zone 2 side of the Zone 1/Zone 2 boundary.

(7) Intrinsic safety type of protection “ic” shall be permitted using any of the wiring methods permitted forunclassified locations. Intrinsic safety type of protection “ic” systems shall be installed in accordancewith the control drawing(s). Simple apparatus, not shown on the control drawing, shall be permitted inan intrinsic safety type of protection “ic” circuit, provided that the simple apparatus does notinterconnect the intrinsic safety type of protection “ic” systems to any other circuit. Separate intrinsicsafety type of protection “ic” systems shall be installed in accordance with one of the following:



(10) In multiconductor cables where the conductors of each circuit have insulation with a minimumthickness of 0.25 mm (0.01 in.)


(11) Optical fiber cable of Types OFNP, OFCP, OFNR, OFCR, OFNG, OFCG, OFN, and OFC shall bepermitted to be installed in cable trays or any other raceway in accordance with 505.15(C). Optical fibercable shall be sealed in accordance with 505.16.

(12) Cablebus.

(13) In industrial establishments with restricted public access, where the conditions of maintenance andsupervision ensure that only qualified persons service the installation, listed Type P cable with orwithout metal braid armor, with an overall jacket, and terminated with fittings listed for the location, andinstalled in accordance with Article 337.




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Where provision must be made for flexibility, one or more of the following shall be permitted:

(1) Listed flexible metal fittings.

(2) Flexible metal conduit with listed fittings.

(3) Interlocked armor Type MC cable with listed fittings.

(4)

(5) TypeP cable.

(6) Type TC-ER or Type TC-ER-HL cable.

(7) Type ITC-ER or Type ITC-HL cable.

(8) Type PLTC-ER cable.



(11) Flexible cord in accordance with the provisions of 505.17 terminated with a listed cord connector thatmaintains the type of protection of the terminal compartment shall be permitted.

(12) For elevator use, an identified elevator cable of Type EO, ETP, or ETT, shown under the “use” columnin Table 400.4 for “hazardous (classified) locations” and terminated with listed fittings.



A separate proposal has been submitted to delete Article 337. Type P should be deleted from Article 505.




Public Comment No. 328-NFPA 70-2018 [Sections 501.10(A), 501.10(B)]

Related Item

• None




Street Address:

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State:

Zip:


Committee: NEC-P14





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(1) General.








(6) Type PVC conduit and Type RTRC conduit shall be permitted where encased in a concrete envelopea minimum of 50 mm (2 in.) thick and provided with not less than 600 mm (24 in.) of cover measuredfrom the top of the conduit to grade. Threaded rigid metal conduit or threaded steel intermediate metalconduit shall be used for the last 600 mm (24 in.) of the underground run to emergence or to the pointof connection to the aboveground raceway. An equipment grounding conductor shall be included toprovide for electrical continuity of the raceway system and for grounding of non–current-carrying metalparts.



(9) In industrial establishments with restricted public access, where the conditions of maintenance andsupervision ensure that only qualified persons service the installation, for applications limited to600 volts nominal or less, and where the cable is not subject to physical damage and terminated withfittings listed for the location, Type TC-ER-HL cable shall be listed for use in Class I, Division 1 or Zone1 locations and shall be installed in accordance with 336.10, including the restrictions of 336.10(7).


(10) In industrial establishments with restricted public access, where the conditions of maintenance andsupervision ensure that only qualified persons service the installation, listed Type P-HL cable withmetal braid armor , with an overall jacket, and terminated with fittings listed for the location, andinstalled in accordance with Article 337.





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Related Item

• FR-8036




Street Address:

City:

State:

Zip:


Committee: NEC-P14





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(1) General.











(9) In industrial establishments with restricted public access, where the conditions of maintenance andsupervision ensure that only qualified persons service the installation, for applications limited to600 volts nominal or less, and where the cable is not subject to physical damage and terminated withfittings listed for the location, Type TC-ER-HL cable shall be listed for use in Class I, Division 1 or Zone1 locations and shall meet the requirements of 336.130, and shall be installed in accordance with336.10 , including the restrictions of 336 . 10(7).






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Related Item

• FR 7834




Street Address:

City:

State:

Zip:


Committee: NEC-P14





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(1) General.




(3) In industrial establishments with restricted public access, where the conditions of maintenance andsupervision ensure that only qualified persons service the installation, and where the cable is notsubject to physical damage, Type ITC-HL cable listed for use in Zone 1 or Class I, Division 1locations, with a gas/vaportight continuous corrugated metallic sheath and an overall jacket of suitablepolymeric material, and terminated with fittings listed for the application. Type ITC-HL cable shall beinstalled in accordance with the provisions of Article 727.







(9) In industrial establishments with restricted public access, where the conditions of maintenance andsupervision ensure that only qualified persons service the installation, for applications limited to600 volts nominal or less, and where the cable is not subject to physical damage and terminated withfittings listed for the location, Type TC-ER-HL cable shall be listed for use in Class I, Division 1 orZone 1 locations and shall be installed in accordance with 336.10, including the restrictions of336.10(7).







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CN_134.pdf 70_CN134



The Correlating Committee directs that this First Revision be reviewed for compliance of section 4.1.1 of the NEC Style Manual. References shall not be made to an entire article.This action will be considered as a Public Comment.

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Ballot Results





Dressman, Kevin L.

Hickman, Palmer L.

Hittinger, David L.

Holub, Richard A.


Kovacik, John R.

Manche, Alan

McDaniel, Roger D.

Pierce, James F.


Williams, David A.




Page 175 of 262


(1) General.




(3) In industrial establishments with restricted public access, where the conditions of maintenance andsupervision ensure that only qualified persons service the installation, and where the cable is notsubject to physical damage, Type ITC-HL cable listed for use in Zone 1 or Class I, Division 1locations, with a gas/vaportight continuous corrugated metallic sheath and an overall jacket of suitablepolymeric material, and terminated with fittings listed for the application. Type ITC-HL cable shall beinstalled in accordance with the provisions of Article 727.







(9) In industrial establishments with restricted public access, where the conditions of maintenance andsupervision ensure that only qualified persons service the installation, for applications limited to600 volts nominal or less, and where the cable is not subject to physical damage and terminated withfittings listed for the location, Type TC-ER-HL cable shall be listed for use in Class I, Division 1 orZone 1 locations and shall be installed in accordance with 336.10, including the restrictions of336.10(7).







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CN_95.pdf 70_CN95



The Correlating Committee directs that this First Revision be reviewed for compliance of section 4.1 of the NEC Style Manual on the use ofredundant section references.This action will be considered as a public comment.

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Submitter Full Name: Erik HohengasserCommittee: Submittal Date: Thu May 10 11:21:14 EDT 2018



The Correlating Committee directs that this First Revision be reviewed for compliance of section 4.1 of the NEC Style Manual on the use of redundant section references.



Ballot Results





Dressman, Kevin L.

Hickman, Palmer L.

Hittinger, David L.

Holub, Richard A.


Kovacik, John R.

Manche, Alan

McDaniel, Roger D.

Pierce, James F.


Williams, David A.




Page 178 of 262













CN_108.pdf 70_CN108



The Correlating Committee directs that this First Revision be reviewed for compliance of section 4.1 of the NEC Style Manual on the use of redundant section references.The Correlating Committee directs that this First Revision be reviewed for compliance of section 4.1.1 of the NEC Style Manual.This action will be considered as a Public Comment.

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Committee: NEC-P14





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Correlating Committee Note No. 108-NFPA 70-2018 [ Section No. 505.15(B)(2) ]




CommitteeStatement:

The Correlating Committee directs that this First Revision be reviewed for compliance ofsection 4.1 of the NEC Style Manual on the use of redundant section references. The Correlating Committee directs that this First Revision be reviewed for compliance ofsection 4.1.1 of the NEC Style Manual. This action will be considered as a Public Comment.

First Revision No. 7840-NFPA 70-2018 [Section No. 505.15(B)(2)]

Ballot Results





Dressman, Kevin L.

Hickman, Palmer L.

Hittinger, David L.

Holub, Richard A.


Kovacik, John R.

Manche, Alan

McDaniel, Roger D.

Pierce, James F.


Williams, David A.


Page 181 of 262








(4) In industrial establishments with restricted public access, where the conditions of maintenance andsupervision ensure that only qualified persons service the installation, listed Type P-HL cable withmetal braid armor , with an overall jacket, and terminated with fittings listed for the location, andinstalled in accordance with Article 337.





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• FR-8036




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(3) In industrial establishments with restricted public access, where the conditions of maintenance andsupervision ensure that only qualified persons service the installation, for applications limited to 600volts nominal or less, and where the cable is not subject to physical damage, and terminated withfittings listed for the location, Type TC-ER-HL cable. Type TC-ER-HL cable shall be listed for use inClass I, Division 1 or Zone 1 locations and shall meet the requirements of 336.130, and shall beinstalled in accordance with 336.10 , including the restrictions of 336 . 10(7).







Related Item

• FR 7840




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(1) General.




(3) Type ITC and Type ITC-ER cable as permitted in 727.4 and terminated with listed fittings. Type ITC-ER shall include a separate insulated equipment grounding conductor in addition to a drain wire.

(4) Type PLTC and Type PLTC-ER cable in accordance with the provisions of Article 725, includinginstallation in cable tray systems. The cable shall be terminated with listed fittings. Type PLTC-ERshall include a separate insulated equipment grounding conductor in addition to a drain wire.


(6) In industrial establishments with restricted public access, where the conditions of maintenance andsupervision ensure that only qualified persons service the installation, and where metallic conduitdoes not provide sufficient corrosion resistance, listed reinforced thermosetting resin conduit (RTRC),factory elbows, and associated fittings, all marked with the suffix -XW, and Schedule 80 PVC conduit,factory elbows, and associated fittings shall be permitted. Where seals are required for boundaryconditions as defined in 505.16(C)(1)(b), the Zone 1 wiring method shall extend into the Zone 2 areato the seal, which shall be located on the Zone 2 side of the Zone 1/Zone 2 boundary.


a. In separate cables

b. In multiconductor cables where the conductors of each circuit are within a grounded metal shield

c. In multiconductor cables where the conductors of each circuit have insulation with a minimumthickness of 0.25 mm (0.01 in.)


(8) Optical fiber cable of Types OFNP, OFCP, OFNR, OFCR, OFNG, OFCG, OFN, and OFC shall bepermitted to be installed in cable trays or any other raceway in accordance with 505.15(C). Opticalfiber cable shall be sealed in accordance with 505.16.

(9) Cablebus.






CN_136.pdf 70_CN136


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The Correlating Committee directs that this First Revision be reviewed for compliance of section 4.1.1 of the NEC Style Manual. References shall not be made to an entire article.This action will be considered as a Public Comment.

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Correlating Committee Note No. 136-NFPA 70-2018 [ Section No. 505.15(C)(1) ]




CommitteeStatement:

The Correlating Committee directs that this First Revision be reviewed for compliance ofsection 4.1.1 of the NEC Style Manual. References shall not be made to an entire article. This action will be considered as a Public Comment.

First Revision No. 7842-NFPA 70-2018 [Section No. 505.15(C)(1)]

Ballot Results





Dressman, Kevin L.

Hickman, Palmer L.

Hittinger, David L.

Holub, Richard A.


Kovacik, John R.

Manche, Alan

McDaniel, Roger D.

Pierce, James F.


Williams, David A.


Page 188 of 262


(1) General.














(12) Cablebus.

(13) In industrial establishments with restricted public access, where the conditions of maintenance andsupervision ensure that only qualified persons service the installation, listed Type P cable with orwithout metal braid armor , with an overall jacket, and terminated with fittings listed for the location, andinstalled in accordance with Article 337.




CMP-6 adopted the language "Type P-HL" to include type-P with braided armor in Article 337.120. As 505.15(B) allows Type P-HL, there is no need to mention that cable construction in the Zone 2 permissions. The Zone 2 permission should more generically state "Type P" which would be inclusive of that with or without armor.


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• FR-8036




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(1) General.



(2) Types MC, MV, TC, or TC-ER cable, including installation in cable tray systems. The Type TC-ERshall include a separate equipment grounding conductor in addition to a drain wire that may bepresent. The cable shall be terminated with listed fittings. Single conductor Type MV cables shall beshielded or metallic-armored.











(12) Cablebus.





The panel should adopt this TC-ER language so the TC-ER constructions also require a separate equipment


139 of 196 9/14/2018, 10:17 AM


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grounding conductor, in addition to any drain wire that may be present. Recent evidence has shown that TC-ER cable constructions are being sold into the market with single pair construction with drain wire, 600V insulation, and with TC-ER marking. The drain wire cannot serve as the EGC as it is not connected at both ends. The word "insulated" was stricken from the language added in the First Revision because the committee action taken in other locations did not impose this restriction - only that the cable construction include an "equipment grounding conductor in addition to a drain wire".

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• FR-7842




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(B) Zone 1.

In Zone 1 locations, only equipment specifically listed and marked as suitable for the location shall bepermitted.

Exception No. 1: Equipment identified for use in Class I, Division 1 and marked as permitted by505.9(C)(1) or listed for use in Zone 0 locations for the same gas, or as permitted by 505.9(B)(2), andwith a suitable temperature class shall be permitted.

Exception No. 2: Equipment identified for Zone 1 or Zone 2 type of protection “p” shall be permitted.


505.9(C) States that "Equipment shall be marked in accordance with 505.9(C)(1) or (C)(2)". The exception in 505.20(B) contradicts this requirement by allowing equipment identified for use in Class I Div, 1 locations.







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• PI




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Submittal Date: Wed Jun 27 16:50:20 EDT 2018

Committee: NEC-P14





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(C) Zone 2.

In Zone 2 locations, only equipment specifically listed and marked as suitable for the location shall bepermitted.

Exception No. 1: Equipment listed for use in Zone 0 or Zone 1 locations for the same gas, or as permittedby 505.9(B)(2), and with a suitable temperature class, shall be permitted.

Exception No. 2: Equipment identified for Zone 1 or Zone 2 type of protection “p” shall be permitted.

Exception No. 3: Equipment identified for use in Class I, Division 1 or Division 2 locations and marked aspermitted by 505.9(C)(1) for the same gas, or as permitted by 505.9(B)(2), and with a suitabletemperature class shall be permitted.

Exception No. 4: In Zone 2 locations, the installation of open or nonexplosionproof or nonflameproofenclosed motors, such as squirrel-cage induction motors without brushes, switching mechanisms, orsimilar arc-producing devices that are not identified for use in a Zone 2 location shall be permitted.

Informational Note No. 1: It is important to consider the temperature of internal and external surfacesthat may be exposed to the flammable atmosphere.

Informational Note No. 2: It is important to consider the risk of ignition due to currents arcing acrossdiscontinuities and overheating of parts in multisection enclosures of large motors and generators.Such motors and generators may need equipotential bonding jumpers across joints in the enclosureand from enclosure to ground. Where the presence of ignitible gases or vapors is suspected, cleanair purging may be needed immediately prior to and during start-up periods.

Informational Note No. 3: For further information on the application of electric motors in Zone 2hazardous (classified) locations, see IEEE 1349-2011, IEEE Guide for the Application of ElectricMotors in Class I, Division 2 and Class I, Zone 2 Hazardous (Classified) Locations.


Consistency with 505.9(C).







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• PI




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506.1 Scope.

This article covers the requirements for the zone classification system as an alternative to the divisionclassification system covered in Article 500, Article 502, and Article 503 for electrical and electronicequipment and wiring for all voltages in Zone 20, Zone 21, and Zone 22 hazardous (classified) locationswhere fire and explosion hazards may exist due to combustible dusts or ignitible fibers/flyings.

Informational Note No. 1: For the requirements for electrical and electronic equipment and wiring forall voltages in Class I, Division 1 or Division 2; Class II, Division 1 or Division 2; Class III, Division 1or Division 2; and Class I, Zone 0 or Zone 1 or Zone 2 hazardous (classified) locations where fire orexplosion hazards may exist due to flammable gases or vapors, flammable liquids, or combustibledusts or fibers, refer to Articles 500 through 505.

Informational Note No. 2: Zone 20, Zone 21, and Zone 22 area classifications are based on themodified IEC area classification system as defined in ANSI/ISA 60079– 10–2 (12.10.05)–2013,Explosive Atmospheres — Part 10–2: Classification of Areas — Combustible Dust Atmospheres.

Informational Note No. 3: The unique hazards associated with explosives, pyrotechnics, and blastingagents are not addressed in this article.

Informational Note No. 4: NFPA 499-2017, Recommended Practice for the Classification ofCombustible Dusts and of Hazardous (Classified) Locations for Electrical Installations in ChemicalProcessing Areas , provides additional information for classification of hazardous (classified)locations using Zone methodology.


FR 7733 deleted the informational note referencing NFPA 499 as there were “no extracts to NFPA 499”, rather than rewording the note to properly reflect that NFPA 499 is an additional reference that may be useful in classifying hazardous locations according to the Zone system. The consensus of the Standard’s Council appointed dust task group was that rewording the informational note and relocating it as shown under the Scope provides a useful reference to the user of the NEC®.

This proposal is in response to the direction from the Standards Council (see Standards Council Decision18-4-26) to coordinate definitions, requirements, and scopes of NFPA 70® (Article 506), NFPA 652, NFPA 484, and NFPA 499. The proposed language comes from the NEC® and Dust Correlating Task Group work, and has representation from members of the NEC® and Dust Correlating committees, as well as members of various dust documents (e.g. NFPA 61, NFPA 652, and NFPA 484) and members of the Technical Committee on Electrical Equipment in Chemical Atmospheres.

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• FR-7733





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506.1 Scope.

This article covers the requirements for the zone classification system as an alternative to the divisionclassification system covered in Article 500, Article 502, and Article 503 for electrical and electronicequipment and wiring for all voltages in Zone 20, Zone 21, and Zone 22 hazardous (classified) locationswhere fire and explosion hazards may exist due to combustible dusts or ignitible fibers/flyings.

Informational Note No. 1: For the requirements for electrical and electronic equipment and wiring forall voltages in Class I, Division 1 or Division 2; Class II, Division 1 or Division 2; Class III, Division 1or Division 2; and Class I, Zone 0 or , Zone 1 or Zone 2 hazardous (classified) locations where fireor explosion hazards may exist due to flammable gases or vapors, flammable liquids, or combustibledusts or fibers, refer to Articles 500 through 505.

Informational Note No. 2: Zone 20, Zone 21, and Zone 22 area classifications are based on themodified IEC area classification system as defined in ANSI/ISA 60079– 10–2 (12.10.05)–2013,Explosive Atmospheres — Part 10–2: Classification of Areas — Combustible Dust Atmospheres.

Informational Note No. 3: The unique hazards associated with explosives, pyrotechnics, and blastingagents are not addressed in this article.



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• FR-7789




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Important information relating to topics covered in Chapter 5can be found in other publications.

Informational Note No. 1: It is important that the authority having jurisdiction be familiar with therecorded industrial experience as well as with standards of the National Fire Protection Association(NFPA), the International Society of Automation (ISA), and the International ElectrotechnicalCommission (IEC) that may be of use in the classification of various locations, the determination ofadequate ventilation, and the protection against static electricity and lightning hazards.

Informational Note No. 2: For additional information concerning the installation of equipment utilizingoptical emissions technology (such as laser equipment) that could potentially become an ignitionsource in hazardous (classified) locations, see ANSI/UL 60079-28-2017, Explosive Atmospheres —Part 28: Protection of equipment and transmission systems using optical radiation.

Informational Note No. 3: For information on electrical resistance trace heating for hazardous(classified) locations, see ANSI/UL 60079-30-1-2017, Standard for Explosive Atmospheres — Part30-1: Electrical Resistance Trace Heating — General and Testing Requirements, and ANSI/IEEE60079-30-2-2015, Explosive Atmospheres — Part 30-2: Electrical resistance trace heating —Application guide for design, installation and maintenance.

Informational Note No. 4: For information on electric skin effect trace heating for hazardous(classified) locations , see ANSI/IEEE 844.1/CSA C22.2 No. 293.1-2017, Standard for Skin EffectTrace Heating of Pipelines, Vessels, Equipment, and Structures — General, Testing, Marking, andDocumentation Requirements, and ANSI/IEEE 844.2/CSA C293.2-2017, Standard for Skin EffectTrace Heating of Pipelines, Vessels, Equipment, and Structures — Application Guide for Design,Installation, Testing, Commissioning, and Maintenance.



CN_114.pdf 70_CN114



The Correlating Committee directs that this First Revision be reviewed for compliance of section 1.3 and 3.1.3 of the NEC Style Manual. Section 506.4(B) shall be written in Code language using mandatory terms. The informational notes contained within this section shall follow the rule to which they apply. It is unclear the rules to which Informational Notes 1 through 4 apply.This action will be considered as a Public Comment.

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CommitteeStatement:

The Correlating Committee directs that this First Revision be reviewed for compliance ofsection 1.3 and 3.1.3 of the NEC Style Manual. Section 506.4(B) shall be written in Codelanguage using mandatory terms. The informational notes contained within this section shallfollow the rule to which they apply. It is unclear the rules to which Informational Notes 1through 4 apply. This action will be considered as a Public Comment.

First Revision No. 7690-NFPA 70-2018 [Section No. 506.4(B)]

Ballot Results





Dressman, Kevin L.

Hickman, Palmer L.

Hittinger, David L.

Holub, Richard A.


Kovacik, John R.

Manche, Alan

McDaniel, Roger D.

Pierce, James F.


Williams, David A.


Page 201 of 262


506.6 Material Groups.

For the purposes of testing, approval, and area classification, various air mixtures (not oxygen enriched)shall be grouped as required in 506.6(A), (B), and (C).

(A) Group IIIC.

Combustible metal dust.Group IIIC also includes ignitible metal fibers or flyings. Group IIIC shall beconsidered to be equivalent to Class II, Group E.

(B) Group IIIB.

Combustible dust other than combustible metal dust. Group IIIB shall be considered to be equivalent toClass II, Groups F and G.

(C) Group IIIA.

Solid particles, including fibers, greater than 500 µm in nominal size, which could be suspended in air andcould settle out of the atmosphere under their own weight. Group IIIA shall be considered to be equivalentto Class III If ignitible metal fibers or flyings are present, the material group is Group IIIC .

Informational Note: Examples of flyings include rayon, cotton (including cotton linters and cottonwaste), sisal, jute, hemp, cocoa fiber, oakum, and baled waste kapok.


Group III(C) currently includes combustible metal dust, but previous to this did not include metal flyings which may be present. As a result, the various NFPA Dust Standards and Recommended practices have all taken different approaches and some specifically prohibited the use of Article 506 to classify locations subject to dust. This proposed language affirms that when the metal fibers/flyings are likely to be present, Group IIIC should be used in lieu of the previous inclusion of all fibers/flyings into Group IIIA.

This proposal is in response to the direction from the Standards Council (see Standards Council Decision18-4-26) to coordinate definitions, requirements, and scopes of NFPA 70® (Article 506), NFPA 652, NFPA 484, and NFPA 499. The proposed language comes from the NEC® and Dust Correlating Task Group work, and has representation from members of the NEC® and Dust Correlating committees, as well as members of various dust documents (e.g. NFPA 61, NFPA 652, and NFPA 484) and members of the Technical Committee on Electrical Equipment in Chemical Atmospheres.




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• FR-7734





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Public Comment No. 1034-NFPA 70-2018 [ Section No. 506.8(H) ]

(H) Protection by Pressurized Enclosure “p”.

This protection technique shall be permitted for equipment in Zone 21 and Zone 22 locations for which it isidentified.

Informational Note: See Table 506.9(C)(2)(3) for the descriptions of subdivisions for pressurizedenclosure “p”.



CN_110.pdf 70_CN110




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Correlating Committee Note No. 110-NFPA 70-2018 [ Section No. 506.8(H) ]




CommitteeStatement:


First Revision No. 7692-NFPA 70-2018 [Section No. 506.8(H)]

Ballot Results





Dressman, Kevin L.

Hickman, Palmer L.

Hittinger, David L.

Holub, Richard A.


Kovacik, John R.

Manche, Alan

McDaniel, Roger D.

Pierce, James F.


Williams, David A.


Page 205 of 262


(I) Protection by Intrinsic Safety “i”.

This protection technique shall be permitted for equipment in Zone 20, Zone 21, and Zone 22 locations forwhich it is listed.

Informational Note: See Table 506.9(C)(2)(3) for the descriptions of subdivisions for intrinsic safety.



CN_113.pdf 70_CN113




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CommitteeStatement:



Ballot Results





Dressman, Kevin L.

Hickman, Palmer L.

Hittinger, David L.

Holub, Richard A.


Kovacik, John R.

Manche, Alan

McDaniel, Roger D.

Pierce, James F.


Williams, David A.


Page 207 of 262


(I) Protection by Intrinsic Safety “i”.

This protection technique shall be permitted for equipment in Zone 20, Zone 21, and Zone 22 locations forwhich it is listed.

Informational Note: See Table 506.9(C)(2)(3) for the descriptions of subdivisions for intrinsic safety.



CN_112.pdf 70_CN112




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Correlating Committee Note No. 112-NFPA 70-2018 [ Section No. 506.8(I) ]




CommitteeStatement:


First Revision No. 7694-NFPA 70-2018 [Section No. 506.8(I)]

Ballot Results





Dressman, Kevin L.

Hickman, Palmer L.

Hittinger, David L.

Holub, Richard A.


Kovacik, John R.

Manche, Alan

McDaniel, Roger D.

Pierce, James F.


Williams, David A.


Page 209 of 262

Public Comment No. 1031-NFPA 70-2018 [ Section No. 506.8(J) ]

(J) Protection by Electrical Resistance Trace Heating “60079-30-1”.

This protection technique shall be permitted for electrical resistance trace heating equipment in Zone 21 orZone 22 for which it is listed.

Informational Note: See Table 506.9(C)(2)(3) for the description of permitted locations for electricalresistance trace heating “60079-30-1”.



CN_111.pdf 70_CN111




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CommitteeStatement:



Ballot Results





Dressman, Kevin L.

Hickman, Palmer L.

Hittinger, David L.

Holub, Richard A.


Kovacik, John R.

Manche, Alan

McDaniel, Roger D.

Pierce, James F.


Williams, David A.


Page 211 of 262


(1) Division Equipment.

Equipment identified for Class II, Division 1 or Class II, Division 2 shall, in addition to being marked inaccordance with 500.8(C), be permitted to be marked with all of the following:

(1) Zone 20, 21, or 22 (as applicable)

(2) Material group in accordance with 506.6

(3) Maximum surface temperature in accordance with 506.9(D), marked as a temperature value indegrees C, preceded by “T” and followed by the symbol “°C”

Equipment Listed as Associated Intrinsically Safe or Nonincendive Field Wiring Apparatus NOT suitable forinstallation in a hazardous (classified) location may be permitted to be marked <method here>.


Article 500.8(6)(c) requires Associated Apparatus/ Associated NIFW Apparatus to be marked with the Class, Division, and Group of the apparatus to which it is to be connected. When going to articles 505.9(C)(1) and 506.9(C)(1), there is no provision for alternate zone marking associated apparatus. Since this marking is required for Zones, it disallows Class/Div listed equipment from bearing the required alternate zones marks. 500.8(C) does allow this as a special allowance and therefore it should be eligible for the alternate zone markings described in 506.9(C)(1)



Public Comment No. 15-NFPA 70-2018 [Section No. 505.9(C)(1)] PI

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Public Comment No. 1019-NFPA 70-2018 [ Section No. 506.9(F) ]

(F) Optical Fiber Cables.

An optical fiber cable, with or without current-carrying conductors (composite optical fiber cable), shall beinstalled to address the associated fire hazard and sealed to address the associated explosion hazard inaccordance with the requirements of 506.15and 506.16.



CN_115.pdf 70_CN115



The Correlating Committee directs that this First Revision be reviewed for compliance with section 3.1.4.1 of the NEC Manual of Style. The Exception is not written in a complete sentence and does not contain mandatory text.This comment will be considered as a Public Comment.

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Correlating Committee Note No. 115-NFPA 70-2018 [ New Section after 506.9(F) ]




CommitteeStatement:

The Correlating Committee directs that this First Revision be reviewed for compliance withsection 3.1.4.1 of the NEC Manual of Style. The Exception is not written in a completesentence and does not contain mandatory text. This comment will be considered as a Public Comment.

First Revision No. 7882-NFPA 70-2018 [New Section after 506.9(F)]

Ballot Results





Dressman, Kevin L.

Hickman, Palmer L.

Hittinger, David L.

Holub, Richard A.


Kovacik, John R.

Manche, Alan

McDaniel, Roger D.

Pierce, James F.


Williams, David A.


Page 214 of 262


(C) Zone 22.


(1) All wiring methods permitted in 506.15(B).

(2) Rigid metal conduit (RMC) or intermediate metal conduit(IMC) with listed threaded or threadlessfittings.

(3) Electrical metallic tubing (EMT) or dusttight wireways.

(4) Type MC or MI cable with listed termination fittings.



(7) Type MV, TC, or TC-ER cable, including installation in cable tray systems. The Type TC-ER cableshall include an equipment grounding conductor in additon to a drain wire that may be present. Thecable shall be terminated with listed fittings.

(8) Intrinsic safety type of protection “ic” shall be permitted using any of the wiring methods permitted forunclassified locations. Intrinsic safety type of protection “ic” systems shall be installed in accordancewith the control drawing(s). Simple apparatus, not shown on the control drawing, shall be permitted in acircuit of intrinsic safety type of protection “ic”, provided that the simple apparatus does notinterconnect the intrinsic safety type of protection “ic” circuit to any other circuit. Separation of circuitsof intrinsic safety type of protection “ic” shall be in accordance with one of the following:

(9) Be in separate cables

(10) Be in multiconductor cables where the conductors of each circuit are within a grounded metalshield

(11) Be in multiconductor cables where the conductors have insulation with a minimum thickness of0.25 mm (0.01 in.)

Informational Note: The term simple apparatus is defined in Article 100 Part III.

(12) Boxes and fittings shall be dusttight.

(13) Optical fiber cable Types OFNP, OFCP, OFNR, OFCR, OFNG, OFCG, OFN, and OFC shall bepermitted to be installed in cable trays or any raceway in accordance with 506.15(C). Optical fibercables shall be sealed in accordance with 506.16.

(14) Cablebus.


The panel should adopt this language so the TC-ER constructions also require a separate equipment grounding conductor, in addition to any drain wire that may be present. Recent evidence has shown that TC-ER cable constructions are being sold into the market with single pair construction with drain wire, 600V insulation, and with TC-ER marking. The drain wire cannot serve as the EGC as it is not connected at both ends.

Related Item

• FR-7707





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Street Address:

City:

State:

Zip:


Committee: NEC-P14





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(A) Zone 20.

In Zone 20 locations, only equipment listed and marked as suitable for the location shall be permitted.

Exception: Equipment listed for use in Class II, Division 1 locations and marked as permitted by506.9(C)(1) with a suitable temperature class shall be permitted.









Related Item

• PI




Street Address:

City:

State:

Zip:


Committee: NEC-P14





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(B) Zone 21.


Exception No. 1: Apparatus listed for use in Class II, Division 1 locations and marked as permitted by506.9(C)(1) with a suitable temperature class shall be permitted.

Exception No. 2: Pressurized equipment identified for Class II, Division 1 and marked as permitted by506.9(C)(1) shall be permitted.









Related Item

• PI




Street Address:

City:

State:

Zip:


Committee: NEC-P14





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(C) Zone 22.


Exception No. 1: Apparatus listed for use in Class II, Division 1 or Class II, Division 2 locations andmarked as permitted by 506.9(C)(1) with a suitable temperature class shall be permitted.

Exception No. 2: Pressurized equipment identified for Class II, Division 1 or Division 2 and marked aspermitted by 506.9(C)(1) shall be permitted.









Related Item

• PI




Street Address:

City:

State:

Zip:


Committee: NEC-P14





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511.12 Ground-Fault Circuit-Interrupter Protection for Personnel.

Ground- All 125-volt, single phase, 15- and 20-ampere receptacles shall have ground-fault circuit-interrupter protection for personnel. The additional ground- fault circuit-interrupter protection for personnelshall be provided as required in 210.8(B) shall not apply .


Please consider PI 2274. As a part of the committee consideration, please review the initial substantiation from CMP-2 regarding 210.8(B) that expanded the GFCI requirements in the 2017 NEC. It has been our experience, without substantiation, installers are not viewing the change as safety related, and are hardwiring portable equipment (if listed) to forgo the GFCI receptacle requirements. To simply accept the proposed changes in order to correlate with the 210.8(B) language (that has not been addressed since 1993 NEC), is questionable. There is a big difference between the language that existed in previous additions of the NEC, and what exists today in the 2017 NEC. We would agree, single phase, 15 and 20 amp, 125 volt receptacles should be GFCI protected. However, it is hard to accept a change on the basis of correlation. The change should be based a solid substantiation, merits of the use, and type of equipment along with the potential safety hazard. In our opinion, based on the initial substantiation (no documented injuries or death), the proposed safety benefit doesn't justify added cost of the GFCI protection.

Related Item

• PI 2274 • FR 7739


Submitter Full Name: Dean Hunter

Organization: Minnesota Department of Labor

Street Address:

City:

State:

Zip:


Committee: NEC-P14


I, Dean Hunter, hereby irrevocably grant and assign to the National Fire Protection Association (NFPA) all and full rights in copyright in thisPublic Comment (including both the Proposed Change and the Statement of Problem and Substantiation). I understand and intend that Iacquire no rights, including rights as a joint author, in any publication of the NFPA in which this Public Comment in this or another similar orderivative form is used. I hereby warrant that I am the author of this Public Comment and that I have full power and authority to enter intothis copyright assignment.

By checking this box I affirm that I am Dean Hunter, and I agree to be legally bound by the above Copyright Assignment and the termsand conditions contained therein. I understand and intend that, by checking this box, I am creating an electronic signature that will, uponmy submission of this form, have the same legal force and effect as a handwritten signature


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(2) Aircraft Painting Hangars.

The area within 3 m (10 ft) horizontally from aircraft surfaces from the floor to 3 m (10 ft) above the aircraftshall be classified as Class I, Division 1 or Class I, Zone 1. The area horizontally from aircraft surfacesbetween 3.0 m (10 ft) and 9.0 m (30 ft) from the floor to 9.0 m (30 ft) above the aircraft surface shall beclassified as Class I, Division 2 or Class I, Zone 2.

Informational Note: See NFPA 33-2015, Standard for Spray Application Using Flammable orCombustible Materials, for information on ventilation and grounding for static protection in spraypainting areas.



Related Item

• FR-7789




Street Address:

City:

State:

Zip:


Committee: NEC-P14





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513.12 Ground-Fault Circuit-Interrupter Protection for Personnel.

Ground-fault All 125 volt, single phase, 15-and 20-ampere receptacles shall have ground fault protectionfor personnel. The additional ground-fault circuit-interrupter protection for personnel shall be provided aspersonnel as required in 210.8(B) shall not apply .


Please consider PI 2275. As a part of the committee consideration, please review the initial substantiation from CMP-2 regarding 210.8(B) that expanded the GFCI requirements in the 2017 NEC. It has been our experience, without substantiation, installers are not viewing the change as safety related, and are hardwiring portable equipment (if listed) to forgo the GFCI receptacle requirements. To simply accept the proposed changes in order to correlate with the 210.8(B) language (that has not been addressed since 1993 NEC), is questionable. There is a big difference between the language that existed in previous additions of the NEC, and what exists today in the 2017 NEC. We would agree, single phase, 15 and 20 amp, 125 volt receptacles should be GFCI protected. However, it is hard to accept a change on the basis of correlation. The change should be based a solid substantiation, merits of the use, and type of equipment along with the potential safety hazard. In our opinion, based on the initial substantiation (no documented injuries or death), the proposed safety benefit doesn't justify added cost of the GFCI protection.

Related Item

• PI 2275 • FR 7742


Submitter Full Name: Dean Hunter

Organization: Minnesota Department of Labor

Street Address:

City:

State:

Zip:


Committee: NEC-P14


I, Dean Hunter, hereby irrevocably grant and assign to the National Fire Protection Association (NFPA) all and full rights in copyright in thisPublic Comment (including both the Proposed Change and the Statement of Problem and Substantiation). I understand and intend that Iacquire no rights, including rights as a joint author, in any publication of the NFPA in which this Public Comment in this or another similar orderivative form is used. I hereby warrant that I am the author of this Public Comment and that I have full power and authority to enter intothis copyright assignment.

By checking this box I affirm that I am Dean Hunter, and I agree to be legally bound by the above Copyright Assignment and the termsand conditions contained therein. I understand and intend that, by checking this box, I am creating an electronic signature that will, uponmy submission of this form, have the same legal force and effect as a handwritten signature


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(A) General Grounding Requirements.

All metal raceways, the metal armor or metallic sheath on cables, and all non–current-carrying metal partsof fixed or portable electrical equipment, regardless of voltage, shall be grounded. Grounding in Class Ilocations shall comply with 501.30 for Class I, Division 1 and 2 locations and 505.25 for Class I, Zone 0, 1,and 2 locations.



Related Item

• FR-7789




Street Address:

City:

State:

Zip:


Committee: NEC-P14





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(B) Supplying Circuits with Grounded and Equipment Grounding Conductors in Class I Locations.

(1) Circuits Supplying Portable Equipment or Pendants.

Where a circuit supplies portables or pendants and includes a grounded conductor as provided in Article200, receptacles, attachment plugs, connectors, and similar devices shall be of the grounding type, and thegrounded conductor of the flexible cord shall be connected to the screw shell of any lampholder or to thegrounded terminal of any utilization equipment supplied.

(2) Approved Means.

Approved means shall be provided for maintaining continuity of the equipment grounding conductorbetween the fixed wiring system and the non–current-carrying metal portions of pendant luminaires,portable luminaires, and portable utilization equipment.


As determined by the Correlating Committee Task Group on Grounding and Bonding the term “grounding conductor” is confusing to users and has been misapplied in many sections of the Code. With numerous proposals from this CC task group, CMP-5 acted to remove this term and definition from Article 100 in the 2008 NEC cycle.

I will respectfully disagree with the panel’s assertion that the title is correct when using the undefined term “grounding conductor”. The panel also failed to provided any technical substantiation or explanation of how the addition of the term “equipment” in the locations indicated “could create an unsafe condition”.

The use of the term “grounding conductor” is in fact unclear and confusing to the user and therefore can create the safety hazard indicated in the panel statement. We are talking about the “green wire” in the feeder, branch circuit and utilization equipment wiring. This conductor is the “equipment grounding conductor” as defined in Article 100, and should be indicated as such for clarity in the Code.

If the panel still believes the present language using this undefined term is correct, I request that this comment be referred to the Correlating Committee for correlation with the rest of the NEC and to ensure the use of defined terminology throughout.

Related Item

• PI 2400


Submitter Full Name: Charles Mello

Organization: Cdcmello Consulting Llc

Street Address:

City:

State:

Zip:

Submittal Date: Sun Aug 26 23:18:44 EDT 2018

Committee: NEC-P14


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I, Charles Mello, hereby irrevocably grant and assign to the National Fire Protection Association (NFPA) all and full rights in copyright inthis Public Comment (including both the Proposed Change and the Statement of Problem and Substantiation). I understand and intend thatI acquire no rights, including rights as a joint author, in any publication of the NFPA in which this Public Comment in this or another similaror derivative form is used. I hereby warrant that I am the author of this Public Comment and that I have full power and authority to enterinto this copyright assignment.

By checking this box I affirm that I am Charles Mello, and I agree to be legally bound by the above Copyright Assignment and the termsand conditions contained therein. I understand and intend that, by checking this box, I am creating an electronic signature that will, uponmy submission of this form, have the same legal force and effect as a handwritten signature


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514.3 Classification of Locations.

[See Figure 514.3.]

Figure 514.3 Classified Areas Adjacent to Dispensers. [30A: Figure 8.3.2(a)]

(A) Unclassified Locations.

Where the authority having jurisdiction can satisfactorily determine that flammable liquids having a flashpoint below 38°C (100°F), such as gasoline, will not be handled, such location shall not be required to beclassified.

(B) Classified Locations.

[See Figure 514.3(B).]

Figure 514.3(B) Classified Areas Adjacent to Dispenser Mounted on Aboveground Storage Tank.[30A: Figure 8.3.2(b)]


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(1) Class I Locations.


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Table 514.3(B)(1) shall be applied where Class I liquids are stored, handled, or dispensed and shall beused to delineate and classify motor fuel dispensing facilities and commercial garages as defined in Article511. Table 515.3 shall be used for the purpose of delineating and classifying aboveground tanks. A Class Ilocation shall not extend beyond an unpierced wall, roof, or other solid partition. [30A:8.1, 8.2, 8.3]

Table 514.3(B)(1) Class I Locations — Motor Fuel Dispensing Facilities

LocationDivision

(Group D)Zone

(Group IIA) Extent of Classified Location1

Dispensing Device (except

Overhead Type) 2, 3

Under dispenser containment 1 1Entire space within and under dispenser pit orcontainment

Dispenser 2 2

Within 450 mm (18 in.) of dispenser enclosure orthat portion of dispenser enclosure containingliquid-handling components, extendinghorizontally in all directions and down to gradelevel

Outdoor 2 2Up to 450 mm (18 in.) above grade level,extending 6 m (20 ft) horizontally in all directionsfrom dispenser enclosure

Indoor

- with mechanical ventilation 2 2Up to 450 mm (18 in.) above floor level,extending 6 m (20 ft) horizontally in all directionsfrom dispenser enclosure

- with gravity ventilation 2 2Up to 450 mm (18 in.) above floor level,extending 7.5 m (25 ft) horizontally in alldirections from dispenser enclosure

Dispensing Device —

Overhead Type4 1 1Space within dispenser enclosure and allelectrical equipment integral with dispensinghose or nozzle

2 2Within 450 mm (18 in.) of dispenser enclosure,extending horizontally in all directions and downto grade level

2 2

Up to 450 mm (18 in.) above grade level,extending 6 m (20 ft) horizontally in all directionsfrom a point vertically below edge of dispenserenclosure

Remote Pump —

Outdoor 1 1Entire space within any pit or box below gradelevel, any part of which is within 3 m (10 ft)horizontally from any edge of pump

2 2Within 900 mm (3 ft) of any edge of pump,extending horizontally in all directions

2 2Up to 450 mm (18 in.) above grade level,extending 3 m (10 ft) horizontally in all directionsfrom any edge of pump

Indoor 1 1 Entire space within any pit

2 2Within 1.5 m (5 ft) of any edge of pump,extending in all directions

2 2Up to 900 mm (3 ft) above floor level, extending7.5 m (25 ft) horizontally in all directions fromany edge of pump

Sales, Storage, RestRooms including structures(such as the attendant’skiosk) on or adjacent todispensers

unclassified unclassified Except as noted below

1 1Entire volume, if there is any opening to roomwithin the extent of a Division 1 or Zone 1location

2 2Entire volume, if there is any opening to roomwithin the extent of a Division 2 or Zone 2location


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LocationDivision

(Group D)Zone


Tank, Aboveground

Inside tank 1 0 Entire inside volume

Shell, ends, roof, dike area 1 1

Entire space within dike, where dike heightexceeds distance from tank shell to inside of dikewall for more than 50 percent of tankcircumference

2 2

Entire space within dike, where dike height doesnot exceed distance from tank shell to inside ofdike wall for more than 50 percent of tankcircumference

Vent 2 2 Within 3 m (10 ft) of shell, ends, or roof of tank

1 1Within 1.5 m (5 ft) of open end of vent, extendingin all directions

2 2Between 1.5 m and 3 m (5 ft and 10 ft) fromopen end of vent, extending in all directions

Tank, Underground


Fill Opening 1 1

Entire space within any pit or box below gradelevel, any part of which is within a Division 1 orDivision 2 classified location or within a Zone 1or Zone 2 classified location

2 2

Up to 450 mm (18 in.) above grade level,extending 1.5 m (5 ft) horizontally in all directionsfrom any tight-fill connection and extending 3 m(10 ft) horizontally in all directions from anyloose-fill connection

Vent 1 1Within 1.5 m (5 ft) of open end of vent, extendingin all directions

2 2Between 1.5 m and 3 m (5 ft and 10 ft) fromopen end of vent, extending in all directions

Vapor Processing System

Pits 1 1

Entire space within any pit or box below gradelevel, any part of which: (1) is within a Division 1or Division 2 classified location; (2) is within aZone 1 or Zone 2 classified location; (3) housesany equipment used to transfer or processvapors

Equipment in protectiveenclosures

2 2 Entire space within enclosure

Equipment not withinprotective enclosure

2 2

Within 450 mm (18 in.) of equipment containingflammable vapors or liquid, extendinghorizontally in all directions and down to gradelevel

2 2Up to 450 mm (18 in.) above grade level within3 m (10 ft) horizontally of the vapor processingequipment

- Equipment enclosure 1 1Entire space within enclosure, if flammable vaporor liquid is present under normal operatingconditions

2 2Entire space within enclosure, if flammable vaporor liquid is not present under normal operatingconditions

- Vacuum assist blower 2 2Within 450 mm (18 in.) of blower, extendinghorizontally in all directions and down to gradelevel


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LocationDivision

(Group D)Zone


2 2Up to 450 mm (18 in.) above grade level,extending 3 m (10 ft) horizontally in all directions

Vault 1 1Entire interior space, if Class I liquids are storedwithin

1For marine application, grade level means the surface of a pier, extending down to water level.

2Refer to Figure 514.3 and Figure 514.3(B) for an illustration of classified location around dispensingdevices.

3Area classification inside the dispenser enclosure is covered in UL 87, Standard for Power-OperatedDispensing Devices for Petroleum Products.

4Ceiling-mounted hose reel. [30A:Table 8.3.1]

(2) Compressed Natural Gas, Liquefied Natural Gas, and Liquefied Petroleum Gas Areas.

Table 514.3(B)(2)shall be used to delineate and classify areas where CNG, LNG, compressed or liquefiedhydrogen, LP-Gas, or combinations of these, are dispensed as motor vehicle fuels along with Class I orClass II liquids that are also dispensed as motor vehicle fuels. [30A:12.1]

Where CNG or LNG dispensers are installed beneath a canopy or enclosure, either the canopy orenclosure shall be designed to prevent accumulation or entrapment of ignitible vapors or all electricalequipment installed beneath the canopy or enclosure shall be suitable for Class I, Division 2 hazardous(classified) locations. [30A:12.4]

Dispensing devices for LP-Gas shall be located as follows:

(1) At least 3 m (10 ft) from any dispensing device for Class I liquids

(2) At least 1.5 m (5 ft) from any dispensing device for Class I liquids where the following conditions exist:

a. The LP-Gas deliver nozzle and filler valve release no more than 4 cm3 (0.1 oz) of liquid upondisconnection.

b. The fixed maximum liquid level gauge remains closed during the entire refueling process.

[30A:12.5.2]

Informational Note No. 1: Applicable requirements for dispensing devices for LP-Gas is found inNFPA 58-2014, Liquefied Petroleum Gas Code.

Informational Note No. 2: For information on classified areas pertaining to LP-Gas systems otherthan residential or commercial, see NFPA 58-2014, Liquefied Petroleum Gas Code, andNFPA 59-2012, Utility LP-Gas Plant Code.

Informational Note No. 3: See 514.3(C) for motor fuel dispensing stations in marinas and boatyards.

Table 514.3(B)(2) Electrical Equipment Classified Areas for Dispensing Devices

DispensingDevice

Extent of Classified Area

Class I, Division 1 Class I, Division 2

Compressednatural gas(CNG)

Entire space within the dispenser enclosure1.5 m (5 ft) in all directions fromdispenser enclosure

Liquefiednatural gas(LNG)

Entire space within the dispenser enclosure3 m (10 ft) in all directions from thedispenser enclosure

Liquefiedpetroleum gas(LP-Gas)

Entire space within the dispenser enclosure;450 mm (18 in.) from the exterior surface of thedispenser enclosure to an elevation of 1.22 m (4 ft)above the base of the dispenser; the entire pit oropen space beneath the dispenser and within 6 m(20 ft) horizontally from any edge of the dispenserwhen the pit or trench is not mechanically ventilated

Up to 450 mm (18 in.) aboveground and within 6 m (20 ft)horizontally from any edge of thedispenser enclosure, including pitsor trenches within this area whenprovided with adequatemechanical ventilation

[30A:Table 12.6.2]


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(3) Fuel Storage.

(a) Aboveground tanks storing CNG or LNG shall be separated from any adjacent property line that isor can be built upon, any public way, and the nearest important building on the same property. [30A:12.3.1]

Informational Note: The relevant distances are given in Section 8.4 of NFPA 52-2013, VehicularGaseous Fuel Systems Code.

(b) Aboveground tanks storing hydrogen shall be separated from any adjacent property line that is orcan be built upon, any public way, and the nearest important building on the same property. [30A:12.3.2]

Informational Note: The relevant distances given in NFPA 2-2011, Hydrogen TechnologiesCode.

(c) Aboveground tanks storing LP-Gas shall be separated from any adjacent property line that is orcan be built upon, any public way, and the nearest important building on the same property. [30A:12.3.3]

Informational Note: The relevant distances are given in Section 6.3 of NFPA 58-2014, LiquefiedPetroleum Gas Code.

(d) Aboveground tanks storing CNG, LNG, or LP-Gas shall be separated from each other by at least6 m (20 ft) and from dispensing devices that dispense liquid or gaseous motor vehicle fuels by at least 6 m(20 ft). [30A:12.3.3]

Exception No. 1: The required separation shall not apply to tanks or dispensers storing or handlingfuels of the same chemical composition.

Exception No. 2: The required separation shall not apply when both the gaseous fuel storage anddispensing equipment are at least 15 m (50 ft) from any other aboveground motor fuel storage ordispensing equipment.

Informational Note: For further information, see NFPA 52-2013, Vehicular Gaseous FuelSystems Code, or NFPA 58-2014, Liquefied Petroleum Gas Code, as applicable.

(e) Dispenser Installations Beneath Canopies. Where CNG or LNG dispensers are installed beneatha canopy or enclosure, either the canopy or enclosure shall be designed to prevent accumulation orentrapment of ignitible vapors or all electrical equipment installed beneath the canopy or enclosure shall besuitable for Class I, Division 2 hazardous (classified) locations. [30A:12.4]

(f) Specific Requirements for LP-Gas Dispensing Devices. [30A:12.5] Dispensing devices for LP-Gasshall be located as follows:



a. The LP-Gas deliver nozzle and filler valve release no more than 4 cm3 (0.1 oz) of liquid upondisconnection.

b. The fixed maximum liquid level gauge remains closed during the entire refueling process.[30A:12.5.2]

Table 514.3(B)(2) shall be used to delineate and classify areas for the purpose of installation of electricalwiring and electrical utilization equipment.

(C) Motor Fuel Dispensing Stations in Boatyards and Marinas.

Informational Note: For additional information, see NFPA 303-2011, Fire Protection Standard forMarinas and Boatyards, and NFPA 30A-2015, Motor Fuel Dispensing Facilities and RepairGarages.

(1) General.

Electrical wiring and equipment located at or serving motor fuel dispensing locations shall be installed onthe side of the wharf, pier, or dock opposite from the liquid piping system.

(2) Classification of Class I, Division 1 and 2 Areas.

The following criteria shall be used for the purposes of applying Table 514.3(B)(1) and Table 514.3(B)(2) tomotor fuel dispensing equipment on floating or fixed piers, wharfs, or docks.


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(D) Closed Construction.

Where the construction of floating docks, piers, or wharfs is closed so that there is no space between thebottom of the dock, pier, or wharf and the water, as in the case of concrete-enclosed expanded foam orsimilar construction, and the construction includes integral service boxes with supply chases, the followingshall apply:

(1) The space above the surface of the floating dock, pier, or wharf shall be a Class I, Division 2 locationwith distances as specified in Table 514.3(B)(1) for dispenser and outdoor locations.

(2) Spaces below the surface of the floating dock, pier, or wharf that have areas or enclosures, such astubs, voids, pits, vaults, boxes, depressions, fuel piping chases, or similar spaces, where flammableliquid or vapor can accumulate shall be a Class I, Division 1 location.

Exception No. 1: Dock, pier, or wharf sections that do not support fuel dispensers and abut, but arelocated 6.0 m (20 ft) or more from, dock sections that support a fuel dispenser(s) shall be permitted to beClass I, Division 2 locations where documented air space is provided between dock sections to allowflammable liquids or vapors to dissipate without traveling to such dock sections. The documentation shallcomply with 500.4(A).

Exception No. 2: Dock, pier, or wharf sections that do not support fuel dispensers and do not directlyabut sections that support fuel dispensers shall be permitted to be unclassified where documented airspace is provided and where flammable liquids or vapors cannot travel to such dock sections. Thedocumentation shall comply with 500.4(A).

(E) Open Construction.

Where the construction of piers, wharfs, or docks is open, as in the case of decks built on stringerssupported by pilings, floats, pontoons, or similar construction, the following shall apply:

(1) The area 450 mm (18 in.) above the surface of the dock, pier, or wharf and extending 6.0 m (20 ft)horizontally in all directions from the outside edge of the dispenser and down to the water level shallbe a Class 1, Division 2 location.

(2) Enclosures such as tubs, voids, pits, vaults, boxes, depressions, piping chases, or similar spaceswhere flammable liquids or vapors can accumulate within 6.0 m (20 ft) of the dispenser shall be aClass I, Division 1 location.



Holub_514.3_514.3_B_.pdf Figures 514.3 and 514.3B


FR-7789 deletes the term "Class I" as it relates to the Zone 0, 1, and 2 locations. "Class I" is retained as an optional marking for equipment and in titles of documents in informational notes, until such documents are updated. As a result, Figure 514.3 and 514.3B need to be updated to delete "Class I", similar to the attached pdf. As I don't have the "source file" for the figures, I could not make the edits in Terra.

Related Item

• FR-7789




Street Address:

City:

State:

Zip:


Committee: NEC-P14


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[See Figure 514.3.]

Figure 514.3 Classified Areas Adjacent to Dispensers. [30A: Figure 8.3.2(a)]


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(A) Unclassified Locations.

Where the authority having jurisdiction can satisfactorily determine that flammable liquids having a flash point below 38°C (100°F), such as gasoline, will not be handled, such location shall not be required to be classified.

(B) Classified Locations.

[See Figure 514.3(B).]

Figure 514.3(B) Classified Areas Adjacent to Dispenser Mounted on Aboveground Storage Tank. [30A: Figure 8.3.2(b)]

(1) Class I Locations.

Table 514.3(B)(1) shall be applied where Class I liquids are stored, handled, or dispensed and shall be used to delineate and classify motor fuel dispensing facilities and commercial garages as defined in Article 511. Table 515.3 shall be used for the purpose of delineating and classifying aboveground tanks. A Class I location shall not extend beyond an unpierced wall, roof, or other solid partition. [30A:8.1, 8.2, 8.3]

Table 514.3(B)(1) Class I Locations — Motor Fuel Dispensing Facilities


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Location Division

(Group D) Zone


Dispensing Device (except Overhead Type) 2, 3

Under dispenser containment 1 1 Entire space within and under dispenser pit or containment

Dispenser 2 2

Within 450 mm (18 in.) of dispenser enclosure or

that portion of dispenser enclosure containing liquid-handling components, extending horizontally in all directions and down to grade level

Outdoor 2 2 Up to 450 mm (18 in.) above grade level, extending 6 m (20 ft) horizontally in all directions from dispenser enclosure

Indoor

- with mechanical ventilation 2 2 Up to 450 mm (18 in.) above floor level, extending 6 m (20 ft) horizontally in all directions from dispenser enclosure

- with gravity ventilation 2 2 Up to 450 mm (18 in.) above floor level, extending 7.5 m (25 ft) horizontally in all directions from dispenser enclosure

Dispensing Device — Overhead Type4

1 1 Space within dispenser enclosure and all electrical equipment integral with dispensing hose or nozzle

2 2 Within 450 mm (18 in.) of dispenser enclosure, extending horizontally in all directions and down to grade level

2 2 Up to 450 mm (18 in.) above grade level, extending 6 m (20 ft) horizontally in all directions from a point vertically below edge of dispenser enclosure

Remote Pump —

Outdoor 1 1 Entire space within any pit or box below grade level, any part of which is within 3 m (10 ft) horizontally from any edge of pump

2 2 Within 900 mm (3 ft) of any edge of pump, extending horizontally in all directions

2 2 Up to 450 mm (18 in.) above grade level, extending 3 m (10 ft) horizontally in all directions from any edge of pump

Indoor 1 1 Entire space within any pit

2 2 Within 1.5 m (5 ft) of any edge of pump, extending in all directions

2 2 Up to 900 mm (3 ft) above floor level, extending 7.5 m (25 ft) horizontally in all directions from any edge of pump

Sales, Storage, Rest Rooms including structures (such as the attendant’s kiosk) on or adjacent to dispensers

unclassified unclassified Except as noted below

1 1 Entire volume, if there is any opening to room within the extent of a Division 1 or Zone 1 location

2 2 Entire volume, if there is any opening to room within the extent of a Division 2 or Zone 2 location


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Location Division

(Group D) Zone


Tank, Aboveground


Shell, ends, roof, dike area 1 1 Entire space within dike, where dike height exceeds distance from tank shell to inside of dike wall for more than 50 percent of tank circumference

2 2 Entire space within dike, where dike height does not exceed distance from tank shell to inside of dike wall for more than 50 percent of tank circumference

Vent 2 2 Within 3 m (10 ft) of shell, ends, or roof of tank

1 1 Within 1.5 m (5 ft) of open end of vent, extending in

all directions

2 2 Between 1.5 m and 3 m (5 ft and 10 ft) from open end of vent, extending in all directions

Tank, Underground


Fill Opening 1 1

Entire space within any pit or box below grade level, any part of which is within a Division 1 or Division 2 classified location or within a Zone 1 or Zone 2 classified location

2 2

Up to 450 mm (18 in.) above grade level, extending 1.5 m (5 ft) horizontally in all directions from any tight-fill connection and extending 3 m (10 ft) horizontally in all directions from any loose-fill connection

Vent 1 1 Within 1.5 m (5 ft) of open end of vent, extending in all directions

2 2 Between 1.5 m and 3 m (5 ft and 10 ft) from open end of vent, extending in all directions

Vapor Processing System

Pits 1 1

Entire space within any pit or box below grade level, any part of which: (1) is within a Division 1 or Division 2 classified location; (2) is within a Zone 1 or Zone 2 classified location; (3) houses any equipment used to transfer or process vapors

Equipment in protective enclosures

2 2 Entire space within enclosure

Equipment not within protective enclosure

2 2 Within 450 mm (18 in.) of equipment containing flammable vapors or liquid, extending horizontally in all directions and down to grade level

2 2 Up to 450 mm (18 in.) above grade level within 3 m (10 ft) horizontally of the vapor processing equipment

- Equipment enclosure 1 1 Entire space within enclosure, if flammable vapor or liquid is present under normal operating conditions

2 2 Entire space within enclosure, if flammable vapor or liquid is not present under normal operating conditions

- Vacuum assist blower 2 2 Within 450 mm (18 in.) of blower, extending horizontally in all directions and down to grade level


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Location Division

(Group D) Zone


2 2 Up to 450 mm (18 in.) above grade level, extending 3 m (10 ft) horizontally in all directions

Vault 1 1 Entire interior space, if Class I liquids are stored within

1For marine application, grade level means the surface of a pier, extending down to water level.

2Refer to Figure 514.3 and Figure 514.3(B) for an illustration of classified location around dispensing devices.

3Area classification inside the dispenser enclosure is covered in UL 87, Standard for Power-Operated Dispensing Devices for Petroleum Products.

4Ceiling-mounted hose reel. [30A:Table 8.3.1]

(2) Compressed Natural Gas, Liquefied Natural Gas, and Liquefied Petroleum Gas Areas.

Table 514.3(B)(2)shall be used to delineate and classify areas where CNG, LNG, compressed or liquefied hydrogen, LP-Gas, or combinations of these, are dispensed as motor vehicle fuels along with Class I or Class II liquids that are also dispensed as motor vehicle fuels. [30A:12.1]

Where CNG or LNG dispensers are installed beneath a canopy or enclosure, either the canopy or enclosure shall be designed to prevent accumulation or entrapment of ignitible vapors or all electrical equipment installed beneath the canopy or enclosure shall be suitable for Class I, Division 2 hazardous (classified) locations. [30A:12.4]

Dispensing devices for LP-Gas shall be located as follows:



a. The LP-Gas deliver nozzle and filler valve release no more than 4 cm3 (0.1 oz) of liquid upon disconnection.

b. The fixed maximum liquid level gauge remains closed during the entire refueling process.

[30A:12.5.2]

Informational Note No. 1: Applicable requirements for dispensing devices for LP-Gas is found in NFPA 58-2014, Liquefied Petroleum Gas Code. Informational Note No. 2: For information on classified areas pertaining to LP-Gas systems other than residential or commercial, see NFPA 58-2014, Liquefied Petroleum Gas Code, and NFPA 59-2012, Utility LP-Gas Plant Code. Informational Note No. 3: See 514.3(C) for motor fuel dispensing stations in marinas and boatyards.

Table 514.3(B)(2) Electrical Equipment Classified Areas for Dispensing Devices

Dispensing Device



Compressed natural gas (CNG)

Entire space within the dispenser enclosure 1.5 m (5 ft) in all directions from dispenser enclosure

Liquefied natural gas (LNG)

Entire space within the dispenser enclosure 3 m (10 ft) in all directions from the dispenser enclosure

Liquefied petroleum gas (LP-Gas)

Entire space within the dispenser enclosure; 450 mm (18 in.) from the exterior surface of the dispenser enclosure to an elevation of 1.22 m (4 ft) above the base of the dispenser; the entire pit or open space beneath the dispenser and within 6 m (20 ft)

Up to 450 mm (18 in.) above ground and within 6 m (20 ft) horizontally

from any edge of the dispenser enclosure, including pits or trenches


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Dispensing Device



horizontally from any edge of the dispenser when the pit or trench is not mechanically ventilated

within this area when provided with adequate mechanical ventilation

[30A:Table 12.6.2]

(3) Fuel Storage.

(a) Aboveground tanks storing CNG or LNG shall be separated from any adjacent property line that is or can be built upon, any public way, and the nearest important building on the same property. [30A:12.3.1]

Informational Note: The relevant distances are given in Section 8.4 of NFPA 52-2013, Vehicular Gaseous Fuel Systems Code.

(b) Aboveground tanks storing hydrogen shall be separated from any adjacent property line that is or can be built upon, any public way, and the nearest important building on the same property. [30A:12.3.2]

Informational Note: The relevant distances given in NFPA 2-2011, Hydrogen Technologies Code.

(c) Aboveground tanks storing LP-Gas shall be separated from any adjacent property line that is or can be built upon, any public way, and the nearest important building on the same property. [30A:12.3.3]

Informational Note: The relevant distances are given in Section 6.3 of NFPA 58-2014, Liquefied Petroleum Gas Code.

(d) Aboveground tanks storing CNG, LNG, or LP-Gas shall be separated from each other by at least 6 m (20 ft) and from dispensing devices that dispense liquid or gaseous motor vehicle fuels by at least 6 m (20 ft). [30A:12.3.3]

Exception No. 1: The required separation shall not apply to tanks or dispensers storing or handling fuels of the same chemical composition.

Exception No. 2: The required separation shall not apply when both the gaseous fuel storage

and dispensing equipment are at least 15 m (50 ft) from any other aboveground motor fuel storage or dispensing equipment.

Informational Note: For further information, see NFPA 52-2013, Vehicular Gaseous Fuel Systems Code, or NFPA 58-2014, Liquefied Petroleum Gas Code, as applicable.

(e) Dispenser Installations Beneath Canopies. Where CNG or LNG dispensers are installed beneath a canopy or enclosure, either the canopy or enclosure shall be designed to prevent accumulation or entrapment of ignitible vapors or all electrical equipment installed beneath the canopy or enclosure shall be suitable for Class I, Division 2 hazardous (classified) locations. [30A:12.4]

(f) Specific Requirements for LP-Gas Dispensing Devices. [30A:12.5] Dispensing devices for LP-Gas shall be located as follows:



a. The LP-Gas deliver nozzle and filler valve release no more than 4 cm3 (0.1 oz) of liquid upon disconnection.

b. The fixed maximum liquid level gauge remains closed during the entire refueling process. [30A:12.5.2]

Table 514.3(B)(2) shall be used to delineate and classify areas for the purpose of installation of electrical wiring and electrical utilization equipment.

(C) Motor Fuel Dispensing Stations in Boatyards and Marinas.


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Informational Note: For additional information, see NFPA 303-2011, Fire Protection Standard for Marinas and Boatyards, and NFPA 30A-2015, Motor Fuel Dispensing Facilities and Repair Garages.

(1) General.

Electrical wiring and equipment located at or serving motor fuel dispensing locations shall be installed on the side of the wharf, pier, or dock opposite from the liquid piping system.

(2) Classification of Class I, Division 1 and 2 Areas.

The following criteria shall be used for the purposes of applying Table 514.3(B)(1) and Table 514.3(B)(2) to motor fuel dispensing equipment on floating or fixed piers, wharfs, or docks.

(D) Closed Construction.

Where the construction of floating docks, piers, or wharfs is closed so that there is no space between the bottom of the dock, pier, or wharf and the water, as in the case of concrete-enclosed expanded foam or similar construction, and the construction includes integral service boxes with supply chases, the following shall apply:

(1) The space above the surface of the floating dock, pier, or wharf shall be a Class I, Division 2 location with distances as specified in Table 514.3(B)(1) for dispenser and outdoor locations.

(2) Spaces below the surface of the floating dock, pier, or wharf that have areas or enclosures, such as tubs, voids, pits, vaults, boxes, depressions, fuel piping chases, or similar spaces, where flammable liquid or vapor can accumulate shall be a Class I, Division 1 location.

Exception No. 1: Dock, pier, or wharf sections that do not support fuel dispensers and abut, but are located 6.0 m (20 ft) or more from, dock sections that support a fuel dispenser(s) shall be permitted to be Class I, Division 2 locations where documented air space is provided between dock sections to allow flammable liquids or vapors to dissipate without traveling to such dock sections. The documentation shall comply with 500.4(A). Exception No. 2: Dock, pier, or wharf sections that do not support fuel dispensers and do not directly abut sections that support fuel dispensers shall be permitted to be unclassified where documented air space is provided and where flammable liquids or vapors cannot travel to such dock sections. The documentation shall comply with 500.4(A).

(E) Open Construction.

Where the construction of piers, wharfs, or docks is open, as in the case of decks built on stringers supported by pilings, floats, pontoons, or similar construction, the following shall apply:

(1) The area 450 mm (18 in.) above the surface of the dock, pier, or wharf and extending 6.0 m (20 ft) horizontally in all directions from the outside edge of the dispenser and down to the water level shall be a Class 1, Division 2 location.

(2) Enclosures such as tubs, voids, pits, vaults, boxes, depressions, piping chases, or similar spaces where flammable liquids or vapors can accumulate within 6.0 m (20 ft) of the dispenser shall be a Class I, Division 1 location.


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515.16 Grounding and Bonding.

All metal raceways, the metal armor or metallic sheath on cables, and all non–current-carrying metal partsof fixed or portable electrical equipment, regardless of voltage, shall be grounded and bonded as providedin Article 250.

Grounding and bonding in Class I locations shall comply with 501.30 for Class I, Division 1 and 2 locationsand 505.25 for Class I, Zone 0, 1, and 2 locations.

Informational Note: For information on grounding for static protection, see 4.5.3.4 and 4.5.3.5 ofNFPA 30-2015, Flammable and Combustible Liquids Code.



Related Item

• FR-7789




Street Address:

City:

State:

Zip:


Committee: NEC-P14





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516.5 Area Classification.

For spray application processes, the area classification is based on quantities of flammable vapors,combustible mists, residues, dusts, or deposits that are present or might be present in quantities sufficientto produce ignitable or explosive mixtures with air.

(A) Zone Classification of Locations.

(1) Classification of Locations.

The Zone system of electrical area classification shall be applied as follows:

(1) The inside of closed containers or vessels shall be considered a Class I, Zone 0 location.

(2) A Class I, Division 1 location shall be permitted to be alternatively classified as a Class I, Zone 1location.

(3) A Class I, Division 2 location shall be permitted to be alternatively classified as a Class I, Zone 2location.

(4) A Class II, Division 1 location shall be permitted to be alternatively classified as a Zone 21 location.

(5) A Class II, Division 2 location shall be permitted to be alternatively classified as a Zone 22 location.[33:6.2.2]

(2) Classification Systems.

For the purposes of electrical area classification, the Division system and the Zone system shall not beintermixed for any given source of release. [33:6.2.3]

In instances of areas within the same facility classified separately, Class I, Zone 2 locations shall bepermitted to abut, but not overlap, Class I Class I , Division 2 locations. Class I, Zone 0 or Zone 1 locationsshall not abut Class I, Division 1 or Division 2 locations. [33:6.2.4]

(3) Equipment.

Open flames, spark-producing equipment or processes, and equipment whose exposed surfaces exceedthe autoignition temperature of the material being sprayed shall not be located in a spray area or in anysurrounding area that is classified as Division 2, Zone 2, or Zone 22. [33:6.2.5]

Exception: This requirement shall not apply to drying, curing, or fusing apparatus.

Any utilization equipment or apparatus that is capable of producing sparks or particles of hot metal and thatis located above or adjacent to either the spray area or the surrounding Division 2, Zone 2, or Zone 22areas shall be of the totally enclosed type or shall be constructed to prevent the escape of sparks orparticles of hot metal. [33:6.2.6]

(B) Class I, Division 1 or Class I, Zone 0 Locations.

The interior of any open or closed container or vessel of a flammable liquid shall be considered Class I,Division 1, or Class I, Zone 0, as applicable.

Informational Note: For additional guidance, see Chapter 6 of NFPA 33-2016, Standard for SprayApplication Using Flammable or Combustible Materials.


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(C) Class I, Division 1; Class I, or Zone 1; Class II, Division 1; or Zone 21 Locations.

The following spaces shall be considered Class I, Division 1; Class I, Zone or Zone 1; Class II, Division 1;or Zone 21 locations, as applicable:

(1) The interior of spray booths and rooms except as specifically provided in 516.5(D).

(2) The interior of exhaust ducts.

(3) Any area in the direct path of spray operations.

(4) Sumps, pits, or below grade channels within 7620 mm (25 ft) horizontally of a vapor source. If thesump, pit, or channel extends beyond 7620 mm (25 ft) from the vapor source, it shall be provided witha vapor stop or it shall be classified as Class I, Division 1 for its entire length. [34:6.4.1]

(5) All space in all directions outside of but within 900 mm (3 ft) of open containers, supply containers,spray gun cleaners, and solvent distillation units containing flammable liquids.

(6) For limited finishing workstations, the area inside the curtains or partitions. [See Figure 516.5(D)(5).]

(D) Class I, Division 2; Class I, or Zone 2; Class II, Division 2; or Zone 22 Locations.

The spaces listed in 516.5(D)(1) through (D)(5) shall be considered Class I, Division 2; Class I, or Zone 2;Class II, Division 2; or Zone 22 as applicable.

(1) Unenclosed Spray Processes.

Electrical wiring and utilization equipment located outside but within 6100 mm (20 ft) horizontally and3050 mm (10 ft) vertically of an enclosed spray area and not separated from the spray area by partitionsextending to the boundaries of the area designated as Division 2, Zone 2 or Zone 22 in Figure 516.5(D)(1)shall be suitable for Class I, Division 2; Class I, or Zone 2; Class II, Division 2; or Zone 22 locations,whichever is applicable. [33:6.5.1] [See Figure 516.5(D)(1).]

Figure 516.5(D)(1) Electrical Area Classification for Unenclosed Spray Areas. [33:Figure 6.5.1]


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(2) Closed-Top, Open-Face, and Open-Front Spray Booths and Spray Rooms.

If spray application operations are conducted within a closed-top, open-face, or open-front booth or room,as shown in Figure 516.5(D)(2), any electrical wiring or utilization equipment located outside of the booth orroom but within 915 mm (3 ft) of any opening shall be suitable for Class I, Division 2; Class I, or Zone 2;Class II, Division 2; or Zone 22 locations, whichever is applicable. The Class I, Division 2; Class I, or Zone2; Class II, Division 2; or Zone 22 locations shown in Figure 516.5(D)(2) shall extend from the edges of theopen face or open front of the booth or room.

Figure 516.5(D)(2) Class I, Division 2; Class I, or Zone 2; Class II, Division 2; or Zone 22 LocationsAdjacent to a Closed Top, Open Face, or Open Front Spray Booth or Room. [33:Figure 6.5.2]

(3) Open-Top Spray Booths.

For spraying operations conducted within an open top spray booth, the space 915 mm (3 ft) vertically abovethe booth and within 915 mm (3 ft) of other booth openings shall be considered Class I, Division 2; Class I,Zone or Zone 2; Class II, Division 2; or Zone 22 whichever is applicable. [33:6.5.3]

(4) Enclosed Spray Booths and Spray Rooms.

For spray application operations confined to an enclosed spray booth or room, electrical area classificationshall be as follows:

(1) The area within 915 mm (3 ft) of any opening shall be classified as Class I, Division 2; Class I, Zone or Zone 2; Class II, Division 2; or Zone 22 locations, whichever is applicable, as shown in Figure516.5(D)(4).

(2) Where automated spray application equipment is used, the area outside the access doors shall beunclassified provided the door interlock prevents the spray application operations when the door isopen.

(3) Where exhaust air is permitted to be recirculated, both of the following shall apply:

(4) The interior of any recirculation path from the secondary particulate filters up to and including theair supply plenum shall be classified as Class I, Division 2;

Class I, Zone

a. or Zone 2; Class II, Division 2; or Zone 22 locations, whichever is applicable.

b. The interior of fresh air supply ducts shall be unclassified.

(5) Where exhaust air is not recirculated, the interior of fresh air supply ducts and fresh air supply plenumsshall be unclassified.

[33:6.5.4]


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(5) Limited Finishing Workstations.


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(a) For limited finishing workstations, the area inside the 915 mm (3 ft) space horizontally and verticallybeyond the volume enclosed by the outside surface of the curtains or partitions shall be classified as Class I,Division 2; Class I, Zone or Zone 2; Class II, Division 2; or Zone 22, as shown in Figure 516.5(D)(5).

(b) A limited finishing workstation shall be designed and constructed to have all of the following:

(3) A dedicated make-up air supply

(4) Curtains or partitions that are noncombustible or limited combustible

(5) A dedicated mechanical exhaust and filtration system

(6) An approved automatic extinguishing system[ 33: 14.3.1]

Informational Note: For limited combustible curtains or partitions see NFPA 701-2015, StandardMethods of Fire Tests for Flame Propagation of Textiles and Films.

(g) The amount of material sprayed in a limited finishing workstation shall not exceed 3.8 L (1 gal) inany 8-hour period. [33:14.3.2]

(h) Curtains or partitions shall be fully closed during any spray operations. [33:14.3.4]

(i) The equipment within the limited finishing workstation shall be interlocked such that the sprayapplication equipment cannot be operated unless the exhaust ventilation system is operating andfunctioning properly and spray application is automatically stopped if the exhaust ventilation system fails.

(j) Any limited finishing workstation used for spray application operations shall not be used for anyoperation that is capable of producing sparks or particles of hot metal or for operations that involve openflames or electrical utilization equipment capable of producing sparks or particles of hot metal. [33:14.3.6]

(k) Where industrial air heaters are used to elevate the air temperature for drying, curing, or fusingoperations, a high limit switch shall be provided to automatically shut off the drying apparatus if the airtemperature in the limited finishing workstation exceeds the maximum discharge-air temperature allowed bythe standard that the heater is listed to or 93°C (200°F), whichever is less. [33:14.3.7.1]

(l) A means shall be provided to show that the limited finishing workstation is in the drying or curingmode of operation and that the limited finishing workstation is to be unoccupied. [33:14.3.7.2]

(m) Any containers of flammable or combustible liquids shall be removed from the limited finishingworkstation before the drying apparatus is energized. [33:14.3.7.3]

(n) Portable spot-drying, curing, or fusion apparatus shall be permitted to be used in a limited finishingworkstation, provided that it is not located within the hazardous (classified) location defined in 14.3.5 ofNFPA 33 when spray application operations are being conducted. [33:14.3.8]

(o) Recirculation of exhaust air shall be permitted when the provisions of 516.5(D)(4)(3) are both met.[33:14.3.9]

Figure 516.5(D)(4) Class I, Division 2; Class I, or Zone 2; Class II, Division 2; or Zone 22 LocationsAdjacent to an Enclosed Spray Booth or Spray Room. [33:Figure 6.5.4]


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Figure 516.5(D)(5) Class I, Division 2; Class I, or Zone 2; Class II, Division 2; or Zone22 Locations Adjacent to a Limited Finishing Workstation. [33:Figure 14.3.5.1]


To correlate with committee action on FR-7789, Class I is deleted in reference to the Zone 0, 1, and 2 locations, though it remains in the text as an optional marking for the equipment and in titles of other documents referenced in the informational notes until such documents titles are updated. The figures will need to be updated accordingly.

Related Item

• FR-7789




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Street Address:

City:

State:

Zip:


Committee: NEC-P14





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Public Comment No. 1073-NFPA 70-2018 [ Sections 516.6(C), 516.6(D) ]

Sections 516.6(C), 516.6(D)


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(C) Illumination.


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Luminaires shall be permitted to be installed as follows:

(1) Luminaires, like that shown in Figure 516.6(C)(a), that are attached to the walls or ceiling of a sprayarea but that are outside any classified area and are separated from the spray area by glass panelsshall be suitable for use in unclassified locations. Such fixtures shall be serviced from outside the sprayarea. [33:6.6.1]

(2) Luminaires, like that shown in Figure 516.6(C)(a), that are attached to the walls or ceiling of a sprayarea; that are separated from the spray area by glass panels and that are located within a Class I,Division 2; a Class I, Zone or a Zone 2; a Class II, Division 2; or a Zone 22 location shall be suitablefor such location. Such fixtures shall be serviced from outside the spray area. [33:6.6.2]

(3) Luminaires, like that shown in Figure 516.6(C)(b), that are an integral part of the walls or ceiling of aspray area shall be permitted to be separated from the spray area by glass panels that are an integralpart of the fixture. Such fixtures shall be listed for use in Class I, Division 2; Class I, Zone or Zone 2;Class II, Division 2; or Zone 22 locations, whichever is applicable, and also shall be listed foraccumulations of deposits of combustible residues. Such fixtures shall be permitted to be serviced frominside the spray area. [33:6.6.3]

(4) Glass panels used to separate luminaires from the spray area or that are an integral part of theluminaire shall meet the following requirements:

(5) Panels for light fixtures or for observation shall be of heat-treated glass, laminated glass, wiredglass, or hammered-wired glass and shall be sealed to confine vapors, mists, residues, dusts, anddeposits to the spray area. [ 33: 5.5.1]

Exception: Listed spray booth assemblies that have vision panels constructed of other materialsshall be permitted.

(6) Panels for light fixtures shall be separated from the fixture to prevent the surface temperature ofthe panel from exceeding 93°C (200°F). [ 33: 5.5.2]

(7) The panel frame and method of attachment shall be designed to not fail under fire exposurebefore the vision panel fails. [ 33: 5.5.3]

Figure 516.6(C)(a) Example of a Luminaire that is Mounted Outside of the Spray Area and isServiced from Outside the Spray Area. [33:Figure 6.6.1]

Figure 516.6(C)(b) Example of a Luminaire that is an Integral Part of the Spray Area and isServiced from Inside the Spray Area. [33:Figure 6.6.3]


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(D) Portable Equipment.

Portable electric luminaires or other utilization equipment shall not be used in a spray area during sprayoperations.

Exception No. 1: Where portable electric luminaires are required for operations in spaces not readilyilluminated by fixed lighting within the spraying area, they shall be of the type identified for Class I,Division 1 or Class 1, Zone 1 locations where readily ignitible residues could be present. [33:6.9Exception]

Exception No. 2: Where portable electric drying apparatus is used in spray booths and the followingrequirements are met:

(1) The apparatus and its electrical connections are not located within the spray enclosure during sprayoperations.

(2) Electrical equipment within 450 mm (18 in.) of the floor is identified for Class I, Division 2 or Class I,Zone 2 locations.

(3) All metallic parts of the drying apparatus are electrically bonded and grounded.

(4) Interlocks are provided to prevent the operation of spray equipment while drying apparatus is withinthe spray enclosure, to allow for a 3-minute purge of the enclosure before energizing the dryingapparatus and to shut off drying apparatus on failure of ventilation system.



Related Item

• FR-7789




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Street Address:

City:

State:

Zip:


Committee: NEC-P14





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Classification is based on quantities of flammable vapors, combustible mists, residues, dusts, or depositsthat are present or might be present in quantities sufficient to produce ignitable or explosive mixtures withair. Electrical wiring and electrical utilization equipment located adjacent to open processes shall complywith the requirements as follows. Examples of these requirements are illustrated in Figure 516.29(a), Figure516.29(b), Figure 516.29(c), and Figure 516.29(d).

Informational Note: For additional guidance, see Chapter 6 of NFPA 33-2016, Standard for SprayApplication Using Flammable or Combustible Materials, and Chapter 6 of NFPA 34-2015, Standardfor Dipping, Coating, and Printing Processes Using Flammable or Combustible Liquids.

(1) Electrical wiring and electrical utilization equipment located in any sump, pit, or below grade channelthat is within 7620 mm (25 ft) horizontally of a vapor source, as defined by this standard, shall besuitable for Class I, Division 1 or Class I, Zone 1 locations. If the sump, pit, or channel extends beyond7620 mm (25 ft) of the vapor source, it shall be provided with a vapor stop, or it shall be classified asClass I, Division 1 or Class I, Zone 1 for its entire length. [34:6.4.1]

(2) Electrical wiring and electrical utilization equipment located within 1525 mm (5 ft) of a vapor sourceshall be suitable for Class I, Division 1 or Class I, Zone 1 locations. The space inside a dip tank, inkfountain, ink reservoir, or ink tank shall be classified as Class I, Division 1 or Class I, Zone 0,whichever is applicable.

(3) Electrical wiring and electrical utilization equipment located within 915 mm (3 ft) of the Class I, Division1 or Class I, Zone 1 location shall be suitable for Class I, Division 2 or Class I, Zone 2 locations,whichever is applicable.

(4) The space 915 mm (3 ft) above the floor and extending 6100 mm (20 ft) horizontally in all directionsfrom the Class I, Division 1 or Class I, Zone 1 location shall be classified as Class I, Division 2 orClass I, Zone 2, and electrical wiring and electrical utilization equipment located within this space shallbe suitable for Class I, Division 2 or Class I, Zone 2 locations, whichever is applicable.

(5) This space shall be permitted to be nonclassified for purposes of electrical installations if the surface

area of the vapor source does not exceed 0.5 m2 (5 ft2), the contents of the dip tank, ink fountain, inkreservoir, or ink tank do not exceed 19 L (5 gal), and the vapor concentration during operating andshutdown periods does not exceed 25 percent of the lower flammable limit.

Figure 516.29(a) Electrical Area Classification for Open Dipping and Coating Processes WithoutVapor Containment or Ventilation. [34:Figure 6.4(a)]

Figure 516.29(b) Electrical Area Classification for Open Dipping and Coating Processes withPeripheral Vapor Containment and Ventilation — Vapors Confined to Process Equipment.[34:Figure 6.4(b)]


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Figure 516.29(c) Electrical Area Classification for Open Dipping and Coating Processes withPartial Peripheral Vapor Containment and Ventilation — Vapors NOT Confined to ProcessEquipment. [34:Figure 6.4(c)]

Figure 516.29(d) Electrical Area Classification for a Typical Printing Process. [34:Figure 6.4(d)]



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Related Item

• FR-7789




Street Address:

City:

State:

Zip:


Committee: NEC-P14





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516.35 Areas Adjacent to Enclosed Dipping and Coating Processes.

Areas adjacent to enclosed dipping and coating processes are illustrated by Figure 516.35 and shall beclassified as follows:

(1) The interior of any enclosed dipping or coating process or apparatus shall be a Class I, Division 1 orClass I, Zone 1 location, and electrical wiring and electrical utilization equipment located within thisspace shall be suitable for Class I, Division 1 or Class I, Zone 1 locations, whichever is applicable. Thearea inside the dip tank shall be classified as Class I, Division 1 or Class I, Zone 0, whichever isapplicable.

(2) The space within 915 mm (3 ft) in all directions from any opening in the enclosure and extending to thefloor or grade level shall be classified as Class I, Division 2 or Class I, Zone 2, and electrical wiringand electrical utilization equipment located within this space shall be suitable for Class I, Division 2locations or Class I, Zone 2 locations, whichever is applicable.

(3) All other spaces adjacent to an enclosed dipping or coating process or apparatus shall be classified asnonhazardous for purposes of electrical installations.

Figure 516.35 Electrical Area Classification Around Enclosed Dipping and Coating Processes.[34:Figure 6.5]


To correlate with committee action on FR-7789, Class I is deleted in reference to the Zone 0, 1, and 2 locations, though it remains in the text as an optional marking for the equipment and in titles of other documents referenced in the informational notes until such documents titles are updated. The figures will need to be updated to match.

Related Item

• FR-7789




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Committee: NEC-P14


194 of 196 9/14/2018, 10:17 AM


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195 of 196 9/14/2018, 10:17 AM


Page 261 of 262


516.37 Luminaires.

For printing, coating, and dipping equipment where the process area is enclosed by glass panels that aresealed to confine vapors and mists to the inside of the enclosure, luminaires that are attached to the wallsor ceilings of a process enclosure and that are located outside of any classified area shall be permitted tobe of general purpose construction. Such luminaires shall be serviced from outside the enclosure.

Luminaires that are attached to the walls or ceilings of a process enclosure, are located within the Class I,Division 2 or Class I, Zone 2 location, and are separated from the process area by glass panels that aresealed to confine vapors and mists shall be suitable for use in that location. Such fixtures shall be servicedfrom outside the enclosure.



Related Item

• FR-7789




Street Address:

City:

State:

Zip:


Committee: NEC-P14





196 of 196 9/14/2018, 10:17 AM


Page 262 of 262