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The evolution of DC in NFPA 70E

Rodney West

Steve McCluer

NFPA 70E, Standard for Electrical Safety in the Workplace, is a companion document to the National Electrical Code (NEC). The next edition will have, for the first time, requirements for dc and battery systems, but not necessarily to the satisfaction of battery technicians. This paper gives an overview of what changes have been proposed for dc arc flash, approach boundaries, and personal protective equipment for work on and around battery systems.

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