Which statement best describes the minimum working space in front of electrical equipment?

• A. 3 feet deep, 24 inches wide, 6 feet 6 inches high.
• B. 3 feet deep, 30 inches wide, 6 feet high.
• C. 3 feet deep, 36 inches wide, 7 feet high.
• D. 3 feet deep, 30 inches wide, 6 feet 6 inches high.

Answer: (D)

The space in front of electrical equipment is set to ensure safe access for operating, inspecting, and servicing the gear. The minimums are three feet of depth from the front of the equipment, at least 30 inches wide (or the full width of the equipment, whichever is greater, but never less than 30 inches), and a height of at least 6 feet 6 inches from the floor (or up to the top of the equipment if it is higher).

This matches the description of three feet deep, thirty inches wide, and six feet six inches high. The other options fall short because they don’t meet one of the minimums: one is too narrow (24 inches), another is too short in height (6 feet), and while another has a wider width or taller height, it does not describe the required minimum combination.