Who must maintain the Limited Approach Boundary distance when opening a panel/enclosure?

• A. The E&I technicians
• B. The Safety Inspector
• C. The Maintenance Clerk
• D. The Plant Operator

Answer: (A)

Limited Approach Boundary is a safeguarded distance around exposed energized parts that unqualified people must not cross. When opening a panel or enclosure, the person performing the electrical work—the E&I technician—must establish and maintain that boundary. They are the qualified worker who verifies de-energization, applies lockout/tagout, and controls access to the area, ensuring only authorized personnel enter and that the boundary stays intact during the task. While safety inspectors monitor compliance and other roles may assist, they do not carry the ongoing responsibility to maintain the boundary during the actual work. Therefore, the electrical and instrumentation technician is the one responsible for maintaining the Limited Approach Boundary in this situation.