Q. What does the Code require if enclosures containing overcurrent protection devices are to be installed in damp or wet locations?
See the answer below.
This answer is based on the 2017 NEC.
A. In damp or wet locations, enclosures containing overcurrent protection devices must prevent moisture or water from entering or accumulating within the enclosure. When the enclosure is surface mounted in a wet location, it must be mounted with not less than ¼ in. of air space between it and the mounting surface. See Sec. 312.2 [240.32].
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