7 Electrical - TECGEN SELECT

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ElectricalW o r k p l a c e S a f e t y

NFPA 70E 2012 Significant Changes

Lee HaleNFPA 70E committee

Hugh HoaglandSr. Partner

7 ElectricalSafety Habits7 ElectricalSafety Habits

7 ElectricalSafety HabitsNFPA 70E

2012 ChangesOBJECTIVES – 2012 EDITION

OBJECTIVES:

Identify 10 significant changes to NFPA 70E, 2012 edition

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2012 ChangesDisclaimer

This document and the opinions in this document are not the opinion of NFPA or the NFPA 70E committee. The information in this document is based on the ballot and the opinions of those attending the meeting and developing the seminar. They are intended for use by companies in developing best practices for electrical safety compliance and may or may not reflect the minimum requirements of NFPA 70E 2012.



2012 Changes100. Arc Flash Boundary

Related terms used throughout the document such as:

• “flash protection boundary”

• “flash hazard boundary,”

• “flash boundary”

• shall be modified to the new term “arc flash boundary.”

• Boundary, Arc Flash

• Boundary, Limited, Restricted, Prohibited

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2012 Changes100. Arc Rating

NEW Informational Note No. 1: Arc-rated clothing or equipment indicating that it has been tested for exposure to an electric arc.

Flame-Resistant (FR) clothing without an arc rating has not been tested for exposure to an electric arc.

This will begin to weed out the garments which are melting FR.



2012 ChangesArc Rating – Total Document

Arc rating will be added across the document to further identify that FR doesn’t always mean the clothing was tested to the correct ASTM test for Arc Rating.

MOST flame resistant (FR) garments are arc rated but some “claim” to be FR but meet no related standards. This will eliminate these from use.

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2012 Changes100. Balaclava

An Arc-Rated hood.. except for the facial area of the eyes and nose.

The eyes and nose are protected by safety glasses or goggles and the arc rated face shield.



2012 Changes100. Working On

Working On (energized electrical conductors or circuit parts). Intentionally coming in contact with energized electrical conductors or circuit parts.

Clarifies the difference between Diagnostic testing and repair.

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Addresses conflicting statements and articles with testing, trouble shooting, electrically safe work condition and electrical work permit and inadvertent contact

Diagnostic Testing is still OK

Intentionally coming in contact (repair) requires an electrical work permit.




“Intentionally” added to avoid confusion with testing – testing is still OK

Permit required if “intentionally” working on and NOT Testing

Cleans up inadvertent contact as it relates to electrically safe work condition and the electrical work permit

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2012 Changes

Exposed (as applied to energized conductors, parts or equipment).

Misunderstood concept

If you can “inadvertently touch” a part, you MUST be protected from it.

84

Exposed to Electrical Hazards



2012 Changes110.1(C) Documentation

There shall be a documented meeting between the host employer and the contract employer.

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2012 Changes110.2 (B) Type of Training

Training can be classroom OR on the job –intent is that a classroom can be anywhere, could be in a job trailer



2012 Changes110.2.C Emergency Procedures

Employees exposed to shock hazards and those employees responsible for taking action in case of emergency shall be trained…

… in methods of release

… first aid, CPR and in automatic external defibrillator (AED) use.

… shall be certified by the employer annually.

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2012 Changes110.2(D)(1)(f) Employee Training

The employer shall determine, through regular supervision or through inspections conducted on at least an annual basis that each employee is complying with the safety-related work practices required by this standard.

Supervisory Work Practice Inspection



2012 Changes110.2(D)(3)(3) Retraining

Retraining shall be performed at intervals not to exceed 3 years.

110.2(E) Training Documentation

The documentation shall contain the content of the training, each employee’s...

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2012 Changes110.3.(E) Electrical Safety Program

Procedures. An electrical safety program shall identify the procedures for working:

• within the Limited Approach Boundary (LAB) and

• for working within the arc flash boundary (AFB)

• before work is started.

Goal of separation of LAB and AFB makes work clearer.



2012 Changes110.3.(G) Job Briefings

Additional job briefings shall be held if changes that might affect the safety of employees occur during the course of the work.

Toolbox Talk

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2012 Changes110.3(H)(1) Electrical Safety Program

• Shall be audited to help ensure that the principles and procedures of the electrical safety program are still in compliance with the latest requirements and regulations.

• The frequency of the audit shall not exceed three years.



2012 Changes110.4 Testing

Only qualified persons shall perform tasks such as testing, troubleshooting, voltage measuring, etc. within the LAB of energized electrical conductors or circuit parts operating at 50 volts or more or where an electrical hazard exists.

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2012 Changes120.2(D) Hazardous Energy Control

Form of Control. Two forms of hazardous electrical energy control shall be permitted:

• simple lockout/tag out

• and complex lockout/tag out.

• Matches OSHA 1910.333.b.2

• Eliminates “individual control” language.



2012 ChangesWork Involving Electrical Hazards130.1 General

All requirements of this article shall applywhether an incident energy analysis is completed or if Table 130.7(C)(15)(a), Table 130.7(C)(15)(b) and Table 130.7(C)(16) are utilized in lieu of an incident energy analysis in accordance with 130.5 exception

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2012 Changes130.2 Electrically Safe Working Conditions.

..shall be put into an electrically safe work condition if either of the following conditions exist: The employee interacts with equipment

where conductors or circuit parts are not exposed, but an increased risk of arc flash hazard exists.

The employee is within the Limited Approach Boundary.

Muse or Use?AFB may apply

Which of these is most likely?



2012 Changes130.2(B)(1) Energized Electrical Work Permit

When Required. When intentionally working on exposed energized conductors or circuit parts within the limited approach boundary.

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2012 Changes130.3.A.1 2009 editionArc Flash Protection Boundary

The 4 foot boundary based on 100 Ka cycles has been

DELETED!

NEW AC and DC Tables will contain the fault current, clearing time and the prospective arc flash boundary's for the tasks!

FINALLY!



2012 Changes130.4(D) Approach by Unqualified Persons.

Unless permitted by 130.4(D)(2), no unqualified person shall be permitted to approach nearer than the Limited Approach Boundary of energized conductors and circuit parts.

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2012 Changes130.5Arc Flash Hazard Analysis

• 5 year review of facility Arc Flash Hazard Analysis still required

• Any changes to system require updating



2012 ChangesTable 130.5 Arc Flash Hazard Analysis

Informational Note No. 5: See IEEE 1584 for more information regarding arc flash hazards for three-phase systems rated less than 240 volts.

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2012 Changes130.5 (C)Equipment Labeling Requirements

At Least One of the Following:

1. Available incident energy & working distance

2. Minimum Arc rating of the clothing

3. Required level of PPE

4. Highest HRC for the equipment

AND



2012 Changes130.5(C) Equipment Labeling Requirements

• Nominal System Voltage

AND

• Arc Flash Boundary

The method of calculating and data to support the information for the label shall be documented.

Labels applied prior to September 30, 2011 are acceptable if they contain available incident energy or required level of PPE!

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2012 Changes130.6(H) Housekeeping duties

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Housekeeping Duties. Employees shall not perform housekeeping duties inside the Limited Approach Boundary where there is a possibility of contact with energized electrical conductors or circuit parts, unless adequate safeguards (such as insulating equipment or barriers) are provided to prevent contact.



2012 Changes130.7(A) Personal and Other Protective Equipment

Informational Note #2

It is the collective experience of the TC that normal operation of enclosed electrical equipment operating at 600 volts or less, properly installed and maintained by qualified persons is not likely to expose and employee to an electrical hazard.

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2012 Changes130.7(C) Personal Protective Equipment

When an employee is working within the Restricted Approach Boundary, the worker shall wear personal protective equipment in accordance with 130.4 sections.

Prohibited

Restricted

Limited



2012 Changes130.7(C)(9)(a) Layering

Garments that are not arc-rated shall not be permitted to be used to increase the arc rating of a clothing system.

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2012 Changes130.7(C)(10)(b) Arc Flash Protective Equipment – Head Protection

An Arc rated balaclava shall be used with an arc rated face shield when the back of the head is within the arc flash boundary.

An arc rated hood shall beused the incident energy exceeds 12 cal/cm2.



2012 Changes130.7(C)(10)(1) Heavy Duty leather gloves

“Heavy duty” leather gloves NEW DEFINITION throughout the standard min thickness 0.7mm.

• Acceptable as Arc Flash protection to 10 cal/cm²

• Rubber gloves with leather protectors for > 10 cal/cm²

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2012 Changes130.7(C)(10)(e) Foot Protection

Heavy duty leather work shoes shall be used in all exposures > 4 cal/cm2

• EH (Electrical Hazard) shoes meeting ASTM F2413 can provide a secondary source of electric shock protection under dry conditions.



2012 ChangesTable 130.7(C)(14) Standards on Protective Equipment

Updating all dates for standards.

Adding new standards for the following:

• DI Aprons- Insulating Standard Specification for Electrically Insulating Aprons ASTM F2677 –08a

• Footwear - Dielectric Test Method Standard Test Method for Determining Dielectric Strength of Dielectric Footwear ASTM F1116 - 03(2008)

• Arc Barrier Shields - ASTM F2522-05, Standard Test Method for Determining the Protective Performance of a Shield Attached on Live Line Tools or on Racking Rods for Electric Arc Hazards

• Arc Flash Blankets - ASTM F2676-09 Standard Test Method for Determining the Protective Performance of an Arc Protective Blanket for Electric Arc Hazards

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2012 Changes130.7(C)(15)(a) AC tables NEW FORMAT

The category headers will contain the following:

• Available fault current & Clearing times

• Working distances

• Prospective Arc Flash Hazard boundary distances



2012 Changes130.7.C.9 2009 edition

600 volt class MCC’s will be broken up into sections to reflect the different available fault currents, clearing times and prospective arc flash hazard boundary’s.

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2012 Changes130.7(C)(15)(b) DC tables - NEW

The category headers will contain the following:

• Available fault current & Clearing time

• Working distances

• Prospective Arc Flash Hazard boundary distances

• Tasks, Hazard/Risk Category's, Rubber insulating gloves and Insulated tools will look like the AC tables.



2012 Changes130.7(C)(16) Personal Clothing and Personal Protective Equipment

HRC 2* and HRC 2 are combined

HRC 2 will require an arc rated face shield and Balaclava or Arc rated flash suit hood.

HRC 1 requires arc rated face shield & safety glasses

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2012 Changes130.8 Work w/in lab OR AFB of uninsulated overhead lines

Determination of Insulation Rating. A qualified person shall determine if the overhead electrical lines are insulated for the voltage at which the lines are operating.

Arc Flash

Boundary was

Added.



2012 ChangesArticle 320 Safety Requirements –Batteries and Battery Rooms

This whole section has been reworked to eliminate most of the installation requirements.

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2012 ChangesDC Arc Flash Calculation Annex D

Most of the proposals are based on Dan Doan’s paper backed up by Kinectrics work for Bruce Hydro



2012 ChangesDC Arc Flash Calc Annex D

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2012 ChangesAnnex F Complete Update



2012 ChangesAnnex F Update on Risk Assessment

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2012 ChangesHRC category - potential changes

Until the research is complete, the field studies & substantiation does not support the changes to HRC categories for all levels of equipment recommended by the submitter. ROC 70E - 334

UNTIL NFPA 70E / IEEE 1584 RESEARCH is complete – NO CHANGES TO HRC Tables or IEEE 1584



2012 ChangesNFPA 70E History

NFPA History – 1979 started at request of OSHA for enforcement

Dormant until late 80’s

2000 Edition introduced the HRC tables

Then 2004 / 2009 / 2012 editions – WHY?

NITMAM process

2012 CAMS – 11 total

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2012 ChangesNFPA 2015 Potential Changes

2012 Edition CAM’s will drive further examination

• Default Arc Flash Boundary

• Default level of no Arc Hazard Risk

• Balaclava requirement

• AC tables boundary's

• Maybe revisions to new DC tables

• “hit the ground running before the ink is dry on 70E 2012”

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7 Electrical - TECGEN SELECT