250.104a 2005 nec. electrically conductive materials must be bonded to the system neutral for clearing of ground faults. question i have is we always bond the cold water piping to the neutral system, but i always thought we were using the cold pipe as a grounding electrode. and the hot water pipe im assuming is concidered bonded through the heating system?
water piping bond
- Thread starter yelwdog
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chris kennedy
Senior Member
- Location
- Miami Fla.
- Occupation
- 60 yr old tool twisting electrician
Only if it meets the requirements of 250.52(A)(1). Around here, all new water services are PVC so we bond as per 250.104.
mcclary's electrical
Senior Member
- Location
- VA
If more than 10 feet of the incoming service is in contact with the earth, then you HAVE to use it as an electrode. If incoming water is plastic, but the interior piping is metal, the piping still needs to be bonded, but not used as a GE. The cold and hot are effectively bonded together by the mixing valves and plumbing fixtures.
jxofaltrds
Inspector Mike®
- Location
- Mike P. Columbus Ohio
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- ESI, PI, RBO
Read this also: http://forums.mikeholt.com/showthread.php?t=117699&highlight=water+bond
I got beat up on this. But it is still a good read.
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