On Tuesday 16 September 2003 2:03 pm, Brian Densmore wrote:
> >  I would also advise against the practice of wrapping a wire around a 
> > water pipe and using it as the ground.

> Good point, but lots of professional systems have a ground attached
> to plumbing. In addition to external grounds.

I believe that the modern code requires that the plumbing be "tied" to the 
independent ground.  On non-conductive plumbing, they may require ground 
connections at the plumbing where electrical appliances such as dishwasherd, 
washing machines, etc. connect.