What should be included on an arc flash label for equipment?

• A. The serial number and manufacturer.
• B. The incident energy and PPE category.
• C. The service voltage and phase rotation.
• D. The incident energy (cal/cm^2), the required PPE category, and the arc flash boundary; sometimes voltage and labeling date.

Answer: (D)

The main idea is what information a proper arc flash label must convey so a worker can assess hazard and choose the right protection. The best label shows the potential incident energy in cal/cm^2, the corresponding PPE category, and the arc flash boundary. This trio lets a worker know how severe an arc could be at a given distance, what level of PPE is required, and how close they can safely approach. Sometimes the label also includes the system voltage and the labeling date for context and tracking, but the essential elements are the incident energy, the PPE category, and the arc flash boundary. Other options miss one or more of these critical pieces, so they don’t provide the complete hazard context needed for safe work.