Tom is on the right track. A water pipe, more than 5' from the entrance is not a "ground" unless you can demonstrate "... industrial and commercial buildings or structures where conditions of maintenance and supervision ensure that only qualified persons service the installation..." applies.
Connection to the EGC in the circuit would be code conforming. 250.110 250.134
If this is supposed to be a clean ground for the electronics I still get back to the IG principles (insulated conductor, run with circuit conductors and isolated all the way back to the ground electrode connection.
I see no way that a terminal, identified as a "ground" can be connected legally to a water pipe more than 5' from the entrance in a dwelling.
This is really a manufacturer's labelling problem. Just because a label says something stupid, does not negate your obligation to insure a code conforming installation.
[This message has been edited by gfretwell (edited 03-21-2006).]
