75 feet is practically complete separation as far as lightning protection
is concerned. I would not tie the two grounds together at all. If you
wanted to connect them, even 00 would not be as good as copper strap, but
75' of strap has a load of inductance, and the pulse will probably just go
somewhere else. I would have a good ground for the tower, and leave the
electrical ground as installed originally. How far is the point where the
feed lines and cables will enter the building from the tower and from the
electrical service entry point? It would be nice to have a single entry
point with a common ground for everything.
-----Original Message-----
From: Tom H [SMTP:biskit@snip.net]
Sent: Saturday, June 19, 1999 7:10 PM
To: towertalk@contesting.com
Subject: [TowerTalk] Connecting Tower GND to Service GND
Hey guy's,
I'm in the process of putting up a small tower on a town lot. While not
having a great deal of real estate to work with, I'm trying to do it right.
I have a ground ring buried around the base, and now want to connect the
ring to the service ground. Problem is, it's about 75 ft away with a 90
degree turn about 25 feet from the tower. Will 4 AWG copper be sufficient,
and should it be insulated or can it be bare. I'm curious if you recommend
one over the other and would like to know your reasons. I realize that 0
or
00 would be better, but man, is that stuff expensive! Tnxs & 7 3, Tom
K3GM
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