The arc flash boundary (AFC) is the approach limit at which a person could receive a second-degree burn if an arc flash occurs. Which label is used for this boundary?

The arc flash boundary (AFC) is the approach limit at which a person could receive a second-degree burn if an arc flash occurs. Which label is used for this boundary?

• A. Arc flash boundary (AFC)
• B. Restricted approach boundary
• C. Limited approach boundary
• D. Incident boundary

Answer: (A)

In arc flash safety, the boundary that marks where the heat energy from an arc could cause a second-degree burn is the arc flash boundary. This distance is defined so that beyond it, the incident energy is only enough to pose a burn risk, guiding PPE and access controls. The focus is on burn injury potential, which is why this boundary is labeled to reflect arc flash hazards rather than shock boundaries. The other terms describe different kinds of hazard boundaries (shock-related limits or broader blast zones), but the one tied to potential burn damage from an arc is the arc flash boundary.

In arc flash safety, the boundary that marks where the heat energy from an arc could cause a second-degree burn is the arc flash boundary. This distance is defined so that beyond it, the incident energy is only enough to pose a burn risk, guiding PPE and access controls. The focus is on burn injury potential, which is why this boundary is labeled to reflect arc flash hazards rather than shock boundaries. The other terms describe different kinds of hazard boundaries (shock-related limits or broader blast zones), but the one tied to potential burn damage from an arc is the arc flash boundary.