I would consider a "single ground connection" solution. Instead of trying to
get "a good ground connection" set an imaginary point as the "ground" and
connect everything, that needs to be grounded to this point. You should, of
course "try to" round this point as well as possible. The idea is that when
lightning strikes, everything is on equivalent potential even if the whole
station is several thousand volts above ground potential.
You will get excess current through the power line feed. That should be taken
care of with surge protection of "regular" measures.
Anyone else with this arrangement?
Hans - N2JFS
-----Original Message-----
From: Mat Eshpeter <kk1c@live.com>
To: Towertalk <towertalk@contesting.com>
Sent: Mon, Nov 12, 2012 4:31 pm
Subject: [TowerTalk] ground rod depth problem due to rocky soil -- solutions?
I am finally getting around to putting up my 60' AN Wireless tower on top of a
rocky ridge in WV. I rented a Hilti demo hammer and got about 1/3 of my rods in
to the ground at least 4' -- but the majority are only 2 or 3 feet deep because
of the rocks/ledges. I don't think I have much of a choice other than to cut
the
rods off and drive the remnants into the ground field and exothermically weld
my
20 gauge copper strap to all of these shallow rods.
Other than paying big money for a well drilling rig to drill some deep 6" holes
and filling them with bentonite (which may not be possible given the slope of
the land and the fact that I now have 8 trenches running 75' out from the tower
pad) do I have any other practical alternatives?
tnx,Matkk1c
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