Charlie Morgan wrote:

You are simply wrong. The NEC agrees with me. Its dangerous and illegal to use
cold water pipes for a ground, and has been for many years. You are a twit.

The CEC on the other hand explicitly allows (and in some cases mandates)
grounding via metal cold water pipe.

In fact, if you have at least 10ft metal piping buried deep enough then
it *must* be used as the service grounding electrode. This is
acceptable without any additional artificial electrodes.

If the above is not available, we can also use a metal well casing,
ground rods (at least 2), or concrete encased electrode under the
building footings.

Chris