Fill in the blank with the appropriate answer.
When installing a single rigid metal or intermediate metal conduit to support a pendant box that supports a luminaire, the threaded joints shall be prevented from loosening by _______.
A. set screws or other effective means
B. placing the luminaire so at any point it shall be at least 8 ft or more above grade or standing area, and 3 ft horizontally from the 8 ft vertical elevation from windows, doors, porches, fire escapes and similar locations
C. “double-cut zigzag” threads
D. Either A or B
Find the Answer
Answer: D
As noted in Sec. 314.23(H)(2), where supported only by a single conduit, the threaded joints shall be prevented from loosening by set screws or other effective means, or the luminaire at any point shall be at least 8 ft or more above grade or standing area, and 3 ft horizontally from the 8 ft vertical elevation from windows, doors, porches, fire escapes and similar locations.
Owen is the owner and president of National Code Seminars and the holder of master electrician certifications in 46 states. He can be reached at [email protected].
