What's Wrong Here?

What’s Wrong Here? Hint: Lousy Liquidtight Conduit Installation

March 28, 2024

Think you know how this installation violates the NEC?

Hint: Lousy liquidtight conduit installation

This is an installation of liquidtight flexible metal conduit (LFMC) where the installer has the LFMC wrapped around railings and otherwise strewn about in a messy fashion. Section 350.30(A) requires LFMC to be securely fastened within 12 inches of each box and at intervals no greater than 4 feet. That certainly didn’t happen here. Section 350.12 does not permit LFMC to be used where it is subject to physical damage. I think an argument could be made that perhaps a more robust wiring method should have been used here, especially near the ground where the LFMC may get stepped on, kicked, or smashed by kids climbing on the structure, playing ball, or riding bikes in this public area.

In addition, the type of cover installed for the receptacles does not comply with Sec. 406.9(B). An enclosure that is weatherproof whether or not the attachment plug cap is inserted must be used in this wet location. Section 110.12 requires installation to be done in a professional and skillful manner. I think a little more skill and professionalism could have been used 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.