What standard guides safe approach distances around live electrical equipment?

• A. OSHA general guidelines only.
• B. Electrical distances are not defined.
• C. NFPA 70E arc-flash guidelines and the employer's electrical safety program; utility clearances as applicable.
• D. Only general caution signs.

Answer: (C)

Safe approach distances are determined by arc-flash analysis and the procedures that implement it. NFPA 70E provides the framework for identifying the potential arc energy and establishing the boundaries—arc-flash boundary and related approach boundaries—so workers know how close they can safely get to energized equipment based on the incident energy and required PPE. The employer’s electrical safety program translates that analysis into real-world controls: training, job steps, permit requirements, process safety rules, and PPE selection to keep workers within safe limits. When work involves utility-owned equipment, additional clearance distances set by the utility must be observed. So, the standard guiding safe approach distances comes from NFPA 70E arc-flash guidelines, applied through the employer's electrical safety program, with any applicable utility clearances. General OSHA guidelines or signs alone do not define these distances.