What is the closest boundary to an exposed conductor referred to as?

The closest boundary to an exposed conductor is referred to as a restricted boundary. This terminology is used in electrical safety practices to denote the area around exposed live conductors where access is limited to only qualified personnel who have been specifically trained to handle electrical hazards.

In many electrical work environments, a restricted boundary signifies that specific safety precautions must be taken, such as the use of personal protective equipment, the implementation of lockout/tagout procedures, and adherence to established safety protocols to mitigate risks. The definition and purpose of a restricted boundary are critical to preventing electrical accidents, ensuring that unqualified individuals do not inadvertently come into contact with dangerous electrical components.

Understanding this concept is essential for maintaining safety in environments where live electrical work occurs. Other terms like control boundary, safety boundary, or access boundary have different meanings and contexts within electrical safety regulations, emphasizing the importance of clearly defining the boundaries in order to ensure the safety of those working with or near electrical systems.