rusty connections

What’s Wrong Here? Hint: Rusty Connections

Nov. 9, 2023
Think you know how this installation violates the NEC?

Hint: Rusty connections

When these equipment grounding conductors were originally installed, I’m guessing there was no buildup of rust and corrosion on the terminal bar. Now, there is serious concerns with the electrical connections here due to a long-term water leak problem. We could point to a few Code Sections that may address problems like this including Sec. 110.12(B) which states in part, “There shall be no damaged parts that may adversely affect safe operation or mechanical strength of the equipment such as parts that are broken; bent; cut; or deteriorated by corrosion, chemical action, or overheating.” We could also look at Sec. 110.14(A) which requires conductors to be connected to terminals to ensure a mechanically secure electrical connection. The buildup of rust and corrosion here certainly makes these electrical connections questionable. The first order of business is to stop the water leak! Once the leak is stopped, repairs can be made to this panelboard by replacing any water damaged parts including this equipment ground bar and starting fresh with newly terminated conductors.

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.

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