Which boundary is described as an approach limit with an increased likelihood of electric shock due to arc-over and inadvertent movement?

Which boundary is described as an approach limit with an increased likelihood of electric shock due to arc-over and inadvertent movement?

• A. Restricted Approach Boundary
• B. Limited Approach Boundary
• C. Arc flash boundary
• D. Shock hazard boundary

Answer: (A)

Understanding electrical hazard boundaries helps you know how close you can safely get to live parts and what protections you need. The restricted approach boundary is the closest limit around exposed energized parts. It marks the area where a shock hazard exists if you come any nearer, and where the risk can increase if you move or if an arc path could form (arc-over) toward your body. Because of that heightened risk, only qualified personnel wearing appropriate equipment and following proper procedures should operate within or cross this boundary. This boundary sets the most stringent requirements, reflecting the greatest potential for electric shock if movement or a fault causes current to find a path to you. The other boundaries address different aspects of hazard (for example, arc flash burn potential or the overall shock zone further out), but they don’t pinpoint the specific proximity and movement-related shock risk as precisely as the restricted approach boundary.

Understanding electrical hazard boundaries helps you know how close you can safely get to live parts and what protections you need. The restricted approach boundary is the closest limit around exposed energized parts. It marks the area where a shock hazard exists if you come any nearer, and where the risk can increase if you move or if an arc path could form (arc-over) toward your body. Because of that heightened risk, only qualified personnel wearing appropriate equipment and following proper procedures should operate within or cross this boundary. This boundary sets the most stringent requirements, reflecting the greatest potential for electric shock if movement or a fault causes current to find a path to you. The other boundaries address different aspects of hazard (for example, arc flash burn potential or the overall shock zone further out), but they don’t pinpoint the specific proximity and movement-related shock risk as precisely as the restricted approach boundary.