Wiring Methods Within Vicinity of Aircraft

Within the vicinity of aircraft in an aircraft hangar, the area within 5 ft horizontally from aircraft power plants or aircraft fuel tanks shall be classified as a Class I, Division 2 location that extends upward from the floor to a level of _____ above the upper surface of wings and of engine enclosures.

a) 2 ft
b) 3 ft
c) 5 ft
d) 6 ft

See answer and applicable Code reference

The correct answer is: c) 5 ft

Article 513 applies to buildings or structures containing aircraft fuel or where aircraft are serviced or maintained. As per 513.3(C)(1), "The area within 5 ft horizontally from aircraft power plants or aircraft fuel tanks shall be classified as a Class I, Division 2 or Zone 2 location that shall extend upward from the floor to a level 5 ft above the upper surface of wings and engine enclosures."

 

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