Wayne Whitney wrote:

On 2006-12-16, Bud-- wrote:


Given that the main panel/disconnect will have a grounding bar where
the Grounding Electrode Conductor terminates, is it good practice to
run the cable TV and telephone earthing wires directly to this grounding
bar?

Connect them to the grounding electrode conductor close to where it
leaves the service.


Well, I have both a bare Cu #6 Ufer ground coming out of the concrete
foundation and a bare #6 GEC that goes to a ground rod and the
metallic water service. They are both connected to the ground bar in
the main disconnect. A few questions:

Is it OK to a use a bare #10 for the telephone/cable ground?
The NEC says insulated, but not the most important issue. Minimum size
#14, #10 is good.

You
suggest that this wire should be clamped to one of the bare Cu #6
conductors, which one?
The Ufer ground, it is really good. (Underground metal water pipes are
good too, but likely farther away. Ground rods are better than nothing.)
[With a Ufer ground you shouldn't need a rod.]

Why is this better than running it to the
ground bar in the main disconnect?

I believe the ground bar is not one of the allowable points of
attachment in the NEC.
And IMHO: It is better not to run the conductor in with power wiring.
Through the ground bar requires an extra connection in the path to the
grounding electrode.

--
bud--