Meaning that sometimes your inspector wants proof that you needed to connect to the water entrance? If you have done that, I don't know why the proof would matter, you'll still need a supplementel electrode(s).
For an electrode purpose, it may be hard to prove the length of metallic pipe, but to bond interior water pipe systems, it is easy to see what material is being used.[/QUOTE]
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no.
inspector: walks into the house, there is no copper, at least none can be seen anywhere, maybe 3" near where the HW tank will go. he looks around the house and finds nothing bonding the water piping system. FAIL. because he thinks there is 10' of copper feeding the house. FAIL until electrician can PROVE otherwise.
electrician: obviously there is no copper in the house, but if you go into the crawl space where the water came into the house there is copper, you see about 2 feet of copper.
electrician: is there 10' of copper there? don't know, but you understand the purpose of the bonding of the system and this isn't it. you don't bond it. FAIL.
electricians boss: cheaper to run it to far reaches of the house than to send a crew back to fix it, and in reality it is cheaper than argueing with an inspector, you will piss him off and then there will be more nit picking.
me: i am stupid, i call him up on the phone and say hey what is the deal. FAIL
rw
ps....either way you are wasting money, it is just which will cost less, argueing with the inspector or installing the wire and clamp.