Another reason for no electrical grounding to pipes is
plumber safety. A plumber must disconnect pipes and not worry
about things electrical - things that are not part of his
trade. Any electrical connection for safety must be unique to
that electrical purpose. Code also calls for jumpers from
cold water to hot water pipes at hot water heater, and jumper
across water meter.

Mark Lloyd wrote:
On Mon, 02 Jan 2006 22:09:00 GMT, (Doug Miller)
wrote:
Nothing should ever be grounded to a water pipe.

It used to be that they should. Is the change because of the possible
use of plastic pipe, or something else?

The 120V receptacle for my washer is grounded at the electrical panel.
The 240V receptacle for the dryer is not.