Quote Originally Posted by mcgroh View Post
Thanks you all for responding. As I stated in my original question, bond and move on is probably the most efficient response. But to clarify and answer some of the other questions you asked:

-it is a copper pipe water supply system. This pex repair was made in an isolated section on the cold water side in the basement on the branch that supplies the Second floor bath. The bonding connection to the panel and the cold side of the copper water supply is made further up stream, closer to the water supply entrance. So what this repair did was to isolate a section of the cold water line beyond this repair. The pex, being not conductive, broke the current path so that the cold water line from that point is no longer bonded as originally intended HOWEVER because this only affected the COLD water line and the hot water side is bonded thru the many brass mixing valves in the home. Therefore the cold water side beyond the repair is still bonded thru the "back" connection thru the valves in the second floor bath to the hot side. (I really hope I haven't confused this!).

-there is little likelihood that this section could become energized and, as I stated, the bath circuit is protected by a GFCI.

- Your point about this NOT being a non-metallic water piping system is key. I hadn't considered this as I obviously, being human, was looking for an answer which confirmed my beliefs! ;>)

-My secondary question was to find the code section or exception that describes the exception Mike mentions in his book, the exception which excludes bonding of isolated sections of metallic pipe in a non-metalic piping system. I could find no mention of that in this code section (250.104) or elsewhere. If someone could find that and reference I'd appreciate it for my own edification.

So I am going to install a jumper, thank the inspector for his vigilance and move on, thankful that I may still win the war even having just lost a minor skirmish!

You have to pick which battles are worth fighting, but sounds like there is a pretty solid bond via mixing valves to the section he thinks is isolated. Touch an ungrounded conductor to that pipe and when it makes a big flash and throws the breaker ask him to prove it is not bonded in any way, Ok maybe don't quite go to that extreme, but the guy needs to get a clue somehow.