Dnk you are really surprising me on this one, I thought this was a clear one.
250.50 states if they are available, the must be bonded.
250.50 doesn't state a underground water pipe must be used as a ground electrode..
Yes 250.50 states it must be bonded.
Bonded into the grounding electrode system.
Then 250.24(C) requires this grounding electrode system to be connected to the grounded conductor by means of a grounding electrode conductor.
If a water pipe is present that meets the criteria of 250.52(A)(1) it
must be used along with any other present electrodes as a grounding electrode.
Bob
