Which standard governs energized electrical work permits and arc flash boundaries?

• A. OSHA 29 CFR 1910
• B. IEEE 1584
• C. NFPA 70B
• D. NFPA 70E

Answer: (D)

NFPA 70E governs energized electrical work permits and arc flash boundaries. It sets how work on or near energized parts must be planned and authorized, requiring an energized work permit when certain tasks are performed to ensure risks are identified and mitigated. It also defines how to establish arc flash boundaries to protect workers from arc flash hazards, using an incident energy assessment to determine the required PPE and safe distances. While IEEE 1584 is used to perform the hazard analysis and estimate incident energy for those boundaries, it is a calculation standard rather than the permit framework. OSHA 29 CFR 1910 provides general safety requirements, but it does not specify the energized work permit process or arc flash boundaries. NFPA 70B, on the other hand, focuses on maintenance of electrical equipment and does not cover the permitting or arc flash boundary requirements.