What boundary protects unqualified personnel from electrical hazards?

The Limited Approach Boundary is specifically designed to protect unqualified personnel from electrical hazards. This boundary establishes a safe distance from exposed energized conductors or equipment within substations or industrial settings. It serves as an important precautionary measure to ensure that individuals who do not have the necessary training or qualifications do not accidentally come into contact with potentially dangerous electrical sources.

In contrast, the Prohibited Approach Boundary is a more stringent limit that prohibits any personnel access to areas where there are risks of shock or arc flash from energized equipment, effectively safeguarding even qualified personnel and requiring special protective measures. The Restricted Approach Boundary defines another zone closer to energized parts, where only qualified personnel with proper tools and training are permitted. The term Safe Approach Boundary is not a standard classification used in electrical safety guidelines, making it less relevant in this context. Understanding these distinctions is critical for ensuring safety in environments where electrical work is conducted.