What information is conveyed by arc flash labels on electrical equipment?

• A. Manufacturer warranty and model number
• B. Incident energy, PPE category, and boundaries
• C. Voltage rating only
• D. Maintenance schedule

Answer: (B)

Arc flash labels give you the exact safety data you need to work confidently around energized equipment: the incident energy level, the PPE category required, and the arc flash boundary. Incident energy, shown in cal/cm², tells you how much heat you could be exposed to if an arc fault occurs, which guides the level of protective clothing and equipment you must wear. The PPE category maps to specific protective gear sets appropriate for that energy level, ensuring you have the right protection for your clothing, face shield, gloves, and other gear. The arc flash boundary indicates how close you can safely approach the equipment without protective measures, or at what distance you should have additional barriers and procedures in place.

Other details like a manufacturer warranty or model number aren’t what determine protective actions, and a simple voltage rating alone doesn’t convey the hazard level or required protection. Maintenance schedules aren’t part of arc flash hazard information either.