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Section 314.17(B)(2) requires cables with nonmetallic sheaths (such as NM cables or the UF cable used in this installation) to be secured to the box except where the cable enters a box through a protective conduit or tubing sleeve as specified in Sec. 300.15(C). This UF cable is sandwiched between the luminaire canopy and the pancake-style box as a means to secure it. I don’t think that was the intent of Sec. 314.17(B)(2). Using a box with a cable connector or cable clamp would have been the correct choice here. Section 225.10(19) permits UF cable as an outside wiring method on the surface of buildings and structures, but pinching the cable between the luminaire canopy and the box was certainly not the best way to do this. Because the luminaire is not sitting flush against the surface, I think moisture and water will be more likely to enter this enclosure causing problems with the wire connections.
About the Author
Russ LeBlancRuss LeBlanc
Owner
Russ started in the electrical trade as an apprentice in 1985. He worked his way up to become a Journeyman Electrician and then eventually became a Master Electrician and Licensed Construction Supervisor. In 1999 Russ become an Electrical Instructor for The Peterson School of Engineering in Massachusetts where he developed his passion for teaching, and quickly became Department Head of Electrical Instruction. Russ has taught thousands of apprentices, electricians, engineers, inspectors, and other electrical professionals during his career as an instructor. He continues to provide electrical professionals with Electrical Code seminars, Arc-Flash Awareness training seminars and educational material through his LeBlanc Consulting Services in North Reading, MA whose specialty is educating electricians. He has been an active member of the NFPA Electrical Section and has authored hundreds of National Electrical Code proposals and comments which have become Code rules to improve the safety for the electrical industry. Russ is also an IAEI certified Electrical Inspector.
Please visit www.russleblanc.net for more information.
