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."