[TowerTalk] Ground strap to water pipe?

[Wes Attaway (N5WA)]

SPG does not have anything to do with your water system.  SPG is concerned
with a common grounding point for electic service, cable, telco, and
radio/antennas.  That is it.  I would forget the connection to the water
pipe and concentrate on making the SPG as good and as simple as possible in
your particular situation.

-----Original Message-----
From: towertalk-bounces at contesting.com
[mailto:towertalk-bounces at contesting.com]On Behalf Of Martin, AA6E
Sent: Sunday, May 08, 2005 9:20 PM
To: Bob Nielsen; towertalk at contesting.com
Subject: Re: [TowerTalk] Ground strap to water pipe?


I can add a few details.  I am indeed in CT, on a granite ledge about
100 ft from the Long Island Sound.  There is a few feet of soil over
the ledge.  The water entrance is "city water", and it runs metallic
for about 50 feet out to the road.  A water entrance ground satisfies
the Code for an AC system ground, and given the granite, it may be as
good as one can get.

So the question is what to do with my SPG.  I do want to give it as
good a connection as I can the to the AC ground system, preferably at
the water service entrance.  In addition, I am thinking of laying out
a horizontal ground rod or two immediately outside the shack.  There
is more info at
http://blog.aa6e.net/archive/2005_03_01_aa6e_log_archive.html .

Anyway, my immediate question is what's the best way to connect the
1.5 inch strap to a steel water pipe.  The normal ground clamps are
for circular wire & cable.  For low inductance, you'd like to wrap the
strap around the pipe, but I wonder about the copper-steel interface
-- how to prevent corrosion and keep good contact.

Again, thanks for your help.

73, Martin AA6E

On 5/8/05, Bob Nielsen <nielsen at oz.net> wrote:
...
>
> He said the AC ground point was at the water pipe.  I believe that
> connecting the water system to the electrical service ground (which must
> have its own ground) is a code requirement just about anywhere there is
> metallic pipe.
> ...

--
martin.ewing at gmail.com
http://blog.aa6e.net
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