Click Fraud wrote:
(Doug Miller) wrote:
The water piping is bonded to the electrical ground in order to insure that
the _water_piping_ has a true electrical ground -- IOW, to prevent the water
piping from becoming live in the event of an electrical fault somewhere.
And this really is an important thing!
My mother in law's dishwasher developed a short to the incoming water
pipe. Most of her water piping is PVC, but some of the outside parts
are metal, and NOT bonded to ground.
We discovered this one day when she went to water the lawn while the
dishwasher was running. She reached for the faucet, and ZAP!
Fortunately, it was not lethal.
Did you find out HOW the dishwasher shorted to the inlet pipe? Seems a
bit hard to fathom unless whoever installed the wiring to the dishwaher
didn't ground it properly.
A plastic bodied water inlet solenoid valve might have insulated the
inlet pipe from the rest of the dishwasher, but how did a switched hot
lead contact the pipe? Maybe the solenoid valve's coil developed a short
to it's case, which was electrically connected to the piping, but not to
the rest of the machine.
My curious mind wants to know...
Jeff
--
Jeffry Wisnia
(W1BSV + Brass Rat '57 EE)
"Rudeness is the weak man's imitation of strength."