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Grounding and Bonding Causing Water Pipe Damage?

According to the NEC, we are required to use the underground metal water pipe (10 ft or more) as the required grounding electrode [250.50] and we are required to bond the aboveground metal water piping system to the grounded (neutral) service conductor [250.104(A)].

Our projects Plumbing contractor is stating that in previous projects that they have experienced leaks in their copper joints and if I (inspector) enforce this requirement I will be promoting leaks.

Have you or any of your subscribers ever run into this situation, and can someone give me the straight facts? Does the grounding or bonding of metal piping (not just limited to plumbing) create a condition where it deteriorates the piping system? If yes, how does this occur and under what conditions would this happen?

Thanks,

Richard Ortega, Electrical Inspector

P.S. Our project is a 20-story Research Building

Mike Holt's Comment: Dear newsletter member, please do not respond with "your opinion." If, however, you have some facts, please click the "View / Add Comments" link above to share the information with the other members.

Grounding and Bonding Book — 2002

Grounding and Bonding textbook is all new and printed in full color. Loaded with detailed, color coded graphics, this text gets to the root of all problems associated with grounding and bonding.

Product Code: 02NCT2
Pages: 94
Illustrations: 206


Table of Contents
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