Which statement about restricted boundary crossing is correct?

• A. A qualified person may cross at any time
• B. A supervisor must be present
• C. Both the unqualified and qualified may cross
• D. An unqualified person is never permitted to cross

Answer: (D)

Restricted boundary crossing is the zone around exposed energized parts where entry is limited to trained and authorized personnel. The aim is to protect workers from arc flash, shocks, and other hazards by ensuring only those who understand the risks and have the proper PPE and procedures enter.

An unqualified person is not permitted to cross this boundary, because they lack the training and safeguards needed to work safely near energized equipment. Even a qualified worker can only cross under the defined safety controls—permits, lockout/tagout, proper PPE, and task authorization—not simply “at any time.” A supervisor’s presence isn’t a universal requirement for every entry; access is governed by the safety procedures and permit systems in place. Because the restricted boundary is about restricting access to those who are prepared to handle the hazards, the statement that an unqualified person is never permitted to cross best captures the rule.