What's Wrong Here?

What’s Wrong Here? Hint: Creative Cable Support

Feb. 23, 2023

Think you know how this installation violates the NEC?

Hint: Creative cable support

metal pipe strap used to secure multiple non-metallic sheathed

Using a metal pipe strap to secure multiple non-metallic sheathed (NM) cables may not be specifically prohibited by Code, but it is also not specifically permitted either. In any case, it makes for a good topic of discussion. Section 334.30 requires NM cable to be secured and supported by staples, cable ties listed and identified for securement, straps, hangars, or similar hardware or fittings designed and installed so the cable is not damaged. I’m not sure that this strap is designed to prevent damage to the cables. The strap may have sharp edges which could damage the cable jacket and conductor insulation. I will certainly give the installer credit for securing the cables, but perhaps a better supporting and securing option could have been used. Using insulated staples would have been a great choice here.

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.