I agree with Washington, please provide the exact code section that allows this practice as suggested:
Originally Posted by evolkmar
Since there was a request for backup, and your vague and condescending answer lacked any details, let's shorten this process, look at NEC 2008 Section 250.130 (C) , and I defy you to find that attaching anywhere to a cold water line is allowed.
And remember that per Section 250.50 refers to 250.52 (A) 1, that describes a metal underground water line in contact 10 feet or longer in earth can be used as a grounding electrode, and only allows attachment of any grounding conductor within 5 feet of the interior portion of the pipe.
Now, what if your suggestion was to someone having a typical well system using black plastic pipe serving the home, and the only metal pipe was inside, connected to the plastic pipe.
Or, even they only had plastic pipe thruout the home, you didn't even suggest metal pipe.
Don't even suggest that a metal pipe is ground because it gets connected to various usage items in the home.
I think I have sufficiently provided backup to cause your suggestion to be refuted, please provide backup for your suggestion.