Which information must be included on an arc flash label?

• A. The incident energy or PPE category required.
• B. The incident energy or PPE category required, the date, and the equipment’s arc-fault information; location and scope of hazard.
• C. The serial number and manufacturer.
• D. The location of the label only.

Answer: (B)

Arc flash labels must clearly communicate the hazard and the protective steps needed to work safely. The most essential details are the incident energy (or the PPE category required), the date of the labeling or calculation, and the equipment’s arc-fault information, along with where the hazard applies.

The incident energy value or the PPE category tells you the heat risk you’re facing and what level of flame-resistant PPE to wear. The date matters because the label should reflect the most current calculations or system changes; outdated labels can mislead you about the actual risk. The equipment’s arc-fault information (such as available fault current and related parameters used to compute the incident energy) anchors the label to the specific conditions of that equipment. Finally, the location and scope of the hazard indicate where the arc flash risk exists and how far the danger extends, guiding you on the approach and which tasks are affected.

Other options miss one or more of these crucial elements: providing only the energy or PPE category lacks context for safety decisions; serial numbers or manufacturer data aren’t about the hazard itself; and labeling location alone doesn't convey the hazard or protection requirements.