What is the highest position the operating handle of a safety switch or circuit breaker may be located above the floor or working platform under the normal working conditions?

• A. 4 ft 6 in
• B. 5 ft
• C. 6 ft
• D. 6 ft 7 in

Answer: (D)

The operating handle must be positioned so an operator can reach it comfortably from the floor or a working platform without needing a ladder or reaching above shoulder level. This ensures a safe, single-person operation during switching and reduces the risk of slips or mistakes.

The highest height allowed for the operating handle is 6 ft 7 in above the floor or platform. That limit provides enough clearance for quick, stable access while keeping the switch within easy reach from ground level.

The other options are lower than the maximum allowable height. They are technically permissible, but they do not represent the upper limit specified for safe access.