What is the name of the boundary that workers must observe when working on energized electrical conductors?

The boundary that workers must observe when working on energized electrical conductors is known as the limited approach boundary. This concept is crucial in maintaining safety when working near live electrical equipment. The limited approach boundary is specifically established to delineate the distance at which unqualified persons may safely approach energized parts. It is based on the voltage present and is designed to prevent accidental contact that could result in electrical shock or injury.

This boundary is part of the broader electrical safety protocols established by standards such as the National Electrical Code (NEC) and the National Fire Protection Association (NFPA) and is crucial for maintaining a safe working environment. It helps ensure that only qualified personnel, who have received appropriate training and understand the hazards, are permitted to work within closer proximity to potentially dangerous electrical systems.

The other terms do not specifically refer to the recognized boundaries as outlined by safety standards in electrical work. While "restricted zone" and "prohibited area" imply limitations, they do not define the specific safety distance for untrained workers regarding energized conductors as clearly as the limited approach boundary does. "Safe distance" is a more general term and may not be based on established safety protocols or sufficient for high-voltage scenarios.