What is the purpose of updating labeling after system changes in arc-flash hazard analysis?

• A. To reflect new incident energy, PPE requirements, boundaries, and labeling.
• B. To make the label decorative.
• C. To increase the system voltage.
• D. To reduce the need for PPE.

Answer: (A)

Updating labeling after system changes keeps workers informed with current arc-flash hazard information. The label communicates the incident energy level, the PPE needed, and the applicable approach boundaries, so tasks can be performed with the right protection and safe distances. When a change occurs—new equipment, rewiring, different fault currents, or protective settings—the calculated incident energy can change, and the label must reflect that. Decorative labeling, increasing voltage, or reducing PPE needs are not the purpose of labeling; outdated labels can create a false sense of safety or inadequate protection. The main goal is to ensure the hazard information is accurate and actionable, guiding the selection of PPE and safe working boundaries.