Discuss Main earthing Conductor also bonds water in the Electrical Forum area at ElectriciansForums.net
I have agreed with you, though if the clamp to the water pipe is easily accessible and the conductor is continuous then measuring the Ze may not be a major problem. Not ideal though, I agree. I would definitely look at running in a separate conductor, just in case wet pants comes along and does some pipework alteration and decides to just cut through the cable.I think @Wilko has it with the Ze problem. And looking at 542.4.1 (18th) it states an MET shall be provided...
and at 542.4.2 ...To facilitate measurement of the resistance of earthing arrangements...
So checking bonding requirements and Ze would be a bit of a conundrum and it could be argued unless there is separate MET complying with the former reg. then it would not comply?
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