Pendant luminaires installed in Class II, Division 1 locations shall be suspended by threaded conduit stems, by chains with approved fittings, or by other approved means. Stems shall be provided with _____ or other effective means to prevent loosening. a) set screws b) welded joints c) expansion joints d) explosionproof flex See answer and applicable Code reference The correct answer is: a) set screws Article 502 of the 2011 NEC covers the installation requirements for Class II ...
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