Surface-type cabinets, cutout boxes, and meter socket enclosures in damp or wet locations shall be mounted so there is at least ______ in. airspace between the enclosure and the wall or supporting surface.
c) 1 1/4
See answer and applicable Code reference
The correct answer is: b) 1/4
Article 312 covers the installation and construction specifications of cabinets, cutout boxes and meter socket enclosures. As noted in the first sentence of Sec. 312.2, "In damp or wet locations, surface-type enclosures within the scope of this Article shall be placed or equipped so as to prevent moisture or water from entering and accumulating within the cabinet or cutout box, and shall be mounted so there is at least 1/4-in. airspace between the enclosure and the wall or other supporting surface."