What is the purpose of arc flash labeling on equipment?

• A. It informs workers of hazard level, incident energy, and required PPE before beginning work.
• B. It lists the warranty period and service intervals.
• C. It indicates the color of the enclosure and paint finish.
• D. It shows the manufacturer's contact information.

Answer: (A)

Arc flash labeling communicates the hazard level at the equipment so workers can protect themselves before starting work. The label typically shows the incident energy in cal/cm^2 or a PPE category, the arc flash boundary, and the PPE required to work safely. With this information, a technician can decide whether de-energizing is necessary, choose the proper flame-resistant clothing, face shield, gloves, and other protections, and avoid approaching closer than the safe distance. This labeling supports safe work practices and NFPA 70E compliance by making the risk and the required precautions visible at the point of access. Warranties, service intervals, enclosure color, and manufacturer contact information don’t convey the hazard or the protective measures needed for arc flash, so they aren’t the purpose of the label.