The restricted approach boundary is intended to prevent an individual from being injured by which hazard while working on exposed energized conductors or circuit parts?

• A. Arc flash
• B. Incident energy
• C. Electric shock
• D. Second-degree burns

Answer: (C)

The restricted approach boundary is all about preventing electric shock. It marks the distance from exposed energized parts within which a person could be shocked if contact is made or if insulation fails, so only qualified personnel with the right PPE and procedures should enter that zone (or the equipment must be de-energized). This boundary specifically targets the electrical current entering the body, not the heat or blast from an arc. Arc-related injuries are governed by other boundaries and concepts, like arc flash boundaries and incident energy. So the hazard being prevented here is electric shock.