On 10/28/2013 1:06 PM, Scott Lurndal wrote:
writes:
On Monday, October 28, 2013 9:18:34 AM UTC-4, philo=A0 wrote:

=20
He did not say /ungrounded/ he said grounded to water line
=20


Again, it's perfectly normal to see CATV, phone grounded to
a cold water line. There is nothing wrong with it, it doesn't
have to be changed and it has nothing to do with the OP's problem.

And again, it's perfectly normal to see the electrical panel
grounded to the cold water line. It's not a code violation.
Good grief.

Section 250.104 of the NEC requires that metal water piping systems
be bonded to one of the following:

If there is not a metal water service (10 ft...) the water pipe must be
bonded using 250.104.

If there is a metal water service (10ft...) the water pipe must be
connected as an earthing electrode, not the same as bonding. 250.50 and
following


This is for safety purposes, not to provide a grounding conductor for the
premises.

This _DOES NOT IMPLY THAT SUCH A BONDING CONDUCTOR MAY REPLACE A CODE COMPLIANT
GROUNDING ELECTRODE SYSTEM_.

In other words, the water pipe is bonded _to_ the real grounding means. The water pipe
may not _be_ the premises grounding means (as of the 1999 code, or possibly earlier).

If there is a metal water service pipe (10ft...) that is all wrong.