Charlie Morgan wrote:
On Mon, 04 Dec 2006 10:22:50 -0600, Bud--
wrote:


Charlie Morgan wrote:

On Sun, 3 Dec 2006 17:56:15 -0500, "RBM" rbm2(remove
wrote:



If you own a code book you can read section 250.131C



It is illegal in all 50 states to use cold water pipes for ground. That has been
true for many years. Cold water pipes should be bonded for safety, but they are
not allowed as a point for grounding wiring.

CWM

Interesting you do not comment on RBM's code citation (which should
actually be 250.130C). It explicitly permits attachment of a ground wire
at "any accessible point on the grounding electrode system". That
includes the first 5 feet of water pipe inside the building. RBM's
statement is in acordance with the NEC.


Incorrect interpretation. You need to take what the code says as a
whole, not just select snippets without context. If you have your own
well, you "might" be able to do that, and get it past an inspector,
but if a water meter exists between that pipe and the part buried in
the earth, you cannot. The pipe, if used, must be unbroken for a
length of at least 10 feet in the earth and enter the houase without
any breaks, joints, or devices in line.

CWM

If the water service pipe has 10 foot or more metal in contact with the
earth it is required to be used as a grounding electrode, and the
electrode connection may be made anywhere within 5 feet of the entrance.
The water meter is required to be bonded. Ground wires discussed may be
connected in the same 5 foot distance from the entrance point, as
permitted in 250.130C. Grounds for phone and other communications
protectors may be connected in the same 5 foot span, as for instance in
800.100B.

RBM's statement should be narrowed to the extent that if there is not 10
ft metal in contact with the earth the water pipe can't be used for
other grounds, as discussed.

These are not code snippets without context. You have not provided any
"code snippets" supporting your view. And you are arguing with 3
electricians (including Thomas Horne).

--
bud--