NFPA 70EARC FLASH

2009 to 2012Standards Review

“Standard for Electrical Safety in the Workplace”

70E Development History

• Evolution– OSHA 1970 - 1910.331-335 “Electrical Safe Work Practices”

– 1/7/76 NFPA – established “electrical standards development committee”

– OSHA 6(b) process

– 1979 first edition published as 1 Part; ‘81-2 Parts; ‘83 – 3 Parts

– 2004 (seventh edition) – name and format changed to present

• OSHA does not reference 70E - ARC FLASH

• Present Format is exactly like NFPA 70 the NEC

OSHA and NFPA 70E• 1910.137 PPE design • 1910.269 Generation; T&D• 1910.301-.308 Subpart S – equipment design and use • 1910.331 – “Electrical Safe Work Practices” – action of

“Incorporated by Reference”• 1910.332 – Training requirement – the Qualified/

Unqualified person• 1910.333 – De-energization, Lock out/Tag out,

Distance requirements, INFEASABLE (70E – Section 130.2.a)

• 1910.334 – Testing, Tools, cords, operating switches• 1910.335 – PPE, Signs, Barricades• 1910.399 – Definitions• 1926.400 Subpart “S” Construction Standard

OSHA Construction1926

• Subpart K -- Electrical General1926.400  Introduction.1926.401  [Reserved]

INSTALLATION SAFETY REQUIREMENTS 1926.402  Applicability.1926.403  General requirements.1926.404  Wiring design and protection.1926.405  Wiring methods, components, and equipment for general use.1926.406  Specific purpose equipment and installations.1926.407  Hazardous (classified) locations.1926.408  Special systems.1926.409-1926.415  [Reserved]

OSHA Construction - Continued1926

• SAFETY-RELATED WORK PRACTICES 1926.416  General requirements.1926.417  Lockout and tagging of circuits.1926.418-1926.430  [Reserved]

• SAFETY-RELATED MAINTENANCE AND ENVIRONMENTAL CONSIDERATIONS 1926.431  Maintenance of equipment.1926.432  Environmental deterioration of equipment.1926.433-1926.440  [Reserved]

• SAFETY REQUIREMENTS FOR SPECIAL EQUIPMENT 1926.441  Battery locations and battery charging.1926.442-1926.448  [Reserved]

• 1926.449  Definitions applicable to this subpart.

Favorite Item• 1910.333(a)(1) and NFPA 70E Section 130.2(a)

• "Deenergized parts." Live parts to which an employee may be exposed shall be deenergized before the employee works on or near them, unless the employer can demonstrate that deenergizing introduces additional or increased hazards or is infeasible due to equipment design or operational limitations. Live parts that operate at less than 50 volts to ground need not be deenergized if there will be no increased exposure to electrical burns or to explosion due to electric arcs.

• Note 1: Examples of increased or additional hazards include interruption of life support equipment, deactivation of emergency alarm systems, shutdown of hazardous location ventilation equipment, or removal of illumination for an area.

• Note 2: Examples of work that may be performed on or near energized circuit parts because of infeasibility due to equipment design or operational limitations include testing of electric circuits that can only be performed with the circuit energized and work on circuits that form an integral part of a continuous industrial process in a chemical plant that would otherwise need to be completely shut down in order to permit work on one circuit or piece of equipment.

70 E Format

• Article 90 – Introduction• Chapter 1 – Safety Related Work Practices• Chapter 2 – Safety-Related Maintenance

Requirements• Chapter 3 – Safety Requirements for Special

Equipment• Annex’s A – P

2012 70E Changes

• There are 19 Major revisions to Article 90 and Chapter 1.

• Major revisions to Article 320 “Safety Requirements Related to Batteries and Battery Rooms

• Chapter 2 and 3 revisions are primarily for clarification and editorial purposes

• Annex’s D,F,H, J and O received substantial changes• Annex P is new – Aligning 70E implementation with

Safety Management standards

Chapter 1 Changes

1. 70E Scope had been revised to align with NEC.2. Definitions of terms not used in the standard have been deleted.

3. “Flame Resistant (FR)” has been changed to “arc-rated (AR) in regard to PPE.

4. New Article 105, “Application of Safety Related Work Practices” with requirements formerly included in Article 110 that apply throughout Chapter 1 has been added.

5. 3 year intervals for employee retraining and for electrical safety program auditing have been included

6. Work practices requirements on use of GFCI’s to protect employees has been added

7. Former 110.8 “Working While Exposed to Electrical Hazards”, has been moved to 130.3

Chapter 1 Changes - Continued

8. New safety related work practice for underground electrical lines and equipment has been added

9. Individual qualified employee control procedure has been deleted from Article 120.

10. Clarification that requirements of Article 130 apply whether energy incident analysis or hazard/ risk table is used to determine use and level of PPE has been provided.

11. New equipment and information have been added covering use of PPE to protect against arc-flash hazard associated with enclosed electrical equipment

12. The content of “energized electrical work permit” (EWP) has been revised and its use clarified.

Chapter 1 Changes - Continued

13. New approach boundary and hazard/risk category tables for direct current circuits have been added, as well as information in Annex D on arc flash calculations

14. A requirement for hearing protection when working within “arc flash boundary” has been added.

15. Arc-flash protection for hands has been revised to specify “heavy – duty” leather gloves.

16. Hazard/ risk category tables have been changed to include short-circuit current, fault clearing time and potential arc flash boundary information in each of the major equipment categories instead of in “specific notes” at the end of the table.

Chapter 1 Changes - Continued

17. 2* delineation for certain H/R Category 2 tasks have been deleted.

18.Former Tables 130.7 (C) (10) and (C) (11) on PPE selection when hazard/risk category method is used have been combined into a single table

19. New information requirements to the equipment labeling provisions have been clarified and added, and an exception for existing installations has been added.

Chapter 2Safety-Related Maintenance Requirements

Article 200 - IntroductionArticle 205 - General Maintenance RequirementsArticle 210 - Substations, Switchgear Assemblies, Switchboards,

Panelboards, Motor Control Centers and Disconnect Switches

Article 215 - Premises WiringArticle 220 - Controller EquipmentArticle 225 - Fuses and Circuit BreakersArticle 230 - Rotating EquipmentArticle 235 - Hazardous (Classified) LocationsArticle 240 - Batteries and Battery RoomsArticle 245 - Portable Electric Tools and EquipmentArticle 250 - Personal Safety and Protective Equipment

Chapter 3Safety Requirements for Special Equipment

•Article 300 - Introduction•Article 310 - Safety-Related Work Practices for

Electrolytic CellsArticle 320 - Safety Requirements Related to Batteries

and Battery RoomsArticle 330 - Safety-Related Work Practices for Use of

LasersArticle 340 - Safety-Related Work Practices: Power

Electronic EquipmentArticle 350 - Safety-Related Work Requirements:

Research and Development Laboratories

ANNEXs

A - Referenced Publications – part of the 70E requirements

B - Informational References – not part of the requirements unless listed in A

C - Limits of Approach – visual depictionD - Incident Energy and Arc Flash Boundary

Calculation MethodsE - Electrical Safety ProgramF - Hazard Analysis, Risk Estimation and Risk

Evaluation ProcedureG - Sample Lockout/ Tagout Procedure

Annex Continued

H - Guidance on Selection of Protective Clothing and other Personal Protective Equipment

I - Job Briefing and Planning ChecklistJ - Energized Electrical Work PermitK - General Categories of Electrical Hazards L - Typical Application of Safeguards in the Cell Line

Working ZoneM - Layering of Protective Clothing and Total System

Arc RatingN - Example Industrial Procedures and Policies for

Working Near Overhead Electrical Lines and Equipment

Annex Continued

O - Safety-Related Design RequirementsP - Aligning Implementation of This Standard

with Occupational Health and Safety Management Standards

SUMMARYMy Personal Favorites

• Article 100 Definitions – “Working On”

• 130.2(a) Infeasable

• 130.7(C)(15)(a) Hazard/Risk Category Classifications

• 130.7(c)(9) (a) Layering

• Annex C – Limits of Approach

• Annex J – Energized Electrical Work Permit

• ?????????????????????????????????