Which document provides guidance on selecting arc-rated PPE and calculating arc-flash boundaries?

• A. NFPA 70E
• B. NEC
• C. OSHA 29 CFR 1910
• D. IEC 60831

Answer: (A)

Focusing on arc-flash PPE and how far the hazard extends is covered by NFPA 70E, Electrical Safety in the Workplace. This standard guides you through performing an arc-flash hazard analysis, often using methods aligned with IEEE 1584, to estimate the incident energy at a specific location in an electrical system. Once you know the incident energy, you select arc-rated PPE—such as protective clothing, face shields, and gloves—with an arc rating that can withstand that energy level. NFPA 70E also explains how to determine arc-flash boundaries, so workers know when and where arc-flash protection is required.

The NEC mainly addresses electrical installations, wiring methods, and equipment ratings, not PPE selection or arc-flash boundary calculations. OSHA 29 CFR 1910 provides general electrical safety requirements and often references 70E, but it does not replace the detailed PPE selection and boundary calculations found in 70E. IEC 60831 deals with fuses and is not related to arc-flash PPE. So NFPA 70E is the standard that directly guides both choosing arc-rated PPE and calculating arc-flash boundaries.