Which boundary term is used to describe the boundary that is treated as direct contact if violated?

Which boundary term is used to describe the boundary that is treated as direct contact if violated?

• A. Limited
• B. Restricted
• C. Prohibited
• D. Open

Answer: (C)

In electrical safety, boundaries around energized parts are drawn to prevent someone from coming into direct contact with live conductors. The boundary that is treated as direct contact if violated is the Prohibited boundary. This innermost zone means that crossing into it is effectively the same as touching live parts, so only qualified personnel using the proper procedures and protective equipment should enter, and only when the work requires it and the system is de-energized or safeguarded. The other boundaries are distinct levels of risk and entry requirements: the Limited approach boundary is farther out and involves shock hazards with specific PPE/training requirements, while the Restricted approach boundary is closer still and imposes stricter PPE and procedures. The term Open isn’t used for these electrical safety boundaries.

In electrical safety, boundaries around energized parts are drawn to prevent someone from coming into direct contact with live conductors. The boundary that is treated as direct contact if violated is the Prohibited boundary. This innermost zone means that crossing into it is effectively the same as touching live parts, so only qualified personnel using the proper procedures and protective equipment should enter, and only when the work requires it and the system is de-energized or safeguarded.

The other boundaries are distinct levels of risk and entry requirements: the Limited approach boundary is farther out and involves shock hazards with specific PPE/training requirements, while the Restricted approach boundary is closer still and imposes stricter PPE and procedures. The term Open isn’t used for these electrical safety boundaries.