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What’s Wrong Here? Hint: Creative Combo

Sept. 19, 2013
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: Creative combo

Find the Answer

It looks as though this installer couldn't decide between metal or plastic, so he decided to use both. Unfortunately, this creative combination created a few NEC violations.

AC cable must be mechanically secured to the box in accordance with 300.10 and supported within 12 in. of the box as per 320.30(B). This AC cable is simply stuffed into a box opening without a connector or clamp.

Grounding type receptacles are required to be connected to an equipment grounding conductor in accordance with 406.4(C). AC cable armor is permitted as an equipment grounding conductor in accordance with 250.118(8), however, since a plastic box was used with this AC cable, there is simply no way to establish a connection from the grounded cable armor to the equipment grounding terminal of the receptacle.

Receptacles must be mounted to a box in accordance with 406.5. This floating, ungrounded receptacle can pose a real shock hazard to anyone attempting to plug a cord into it.

AC cable secured to a metal box, and a securely installed and properly grounded receptacle and plate would make for a much safer installation.

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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