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What’s Wrong Here? Hint: One More Use for Duct Tape

Aug. 7, 2014
Can you identify the Code violation(s) in this photo?

How well do you know the Code? Think you can spot violations the original installer either ignored or couldn't identify? Here's your chance to moonlight as an electrical inspector and second-guess someone else's work from the safety of your living room or office. It's your turn to identify the violation.

Hint: One more use for duct tape

Find the Answer

Thanks to Dale D. Hoffart, a senior electrical designer from Lincoln, Neb., for sharing this photo with us. It’s just another fine example of how to use duct tape on the job.

Section 110.8 states, “Only wiring methods recognized as suitable are included in this Code.” I don’t know about you, but I cannot find “duct tape wiring methods” anywhere in the NEC — yet there it is being used as a coupling for the pipe in this photo.

Section 352.6 requires PVC and its fittings to be listed. To the best of my knowledge, duct tape is not listed for this purpose. Sec. 352.48 requires joints between conduit lengths, fittings, and boxes to be made in an approved manner. I suppose if the AHJ approved this method then it may be permitted, but a knowledgeable inspector would know that there are listed fittings and solvent cements that are specifically made for making joints in PVC conduit — and would most likely reject this technique.

I am also concerned about the pipe getting damaged from ground movement as recognized in Sec. 300.5(J) or thermal expansion and contraction of the PVC as recognized in 352.44. The use of a PVC expansion fitting could help alleviate either of these potential problems.

About the Author

Russ 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.

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