What is the maximum height for the operating handle above the floor under normal conditions?

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

Answer: (D)

The main point here is how high a person can reach to operate a device from the floor without any assistance. The maximum height for the operating handle is set at six feet seven inches. This height is chosen so a worker can comfortably reach and operate a switch or disconnect with one hand from the floor, without needing a ladder or step stool, which helps keep operations quick and safe during normal maintenance or emergency actions.

Other options are either too low to accommodate all workers (a shorter reach can still be operated, but it isn’t the official maximum) or not at the designated limit. Six feet seven inches is the upper limit that ensures accessibility while maintaining safety.