Hi Brad,
Refer to the instructions from the PE you hired, and do that.
For my TX472, my PE (Hank KR7X) specified one ground rod/
electrode per tower leg, connected using 2/0 wire or
equivalent, with all rods/electrodes interconnected using
2/0 wire. I did exactly that: http://www.tinyurl.com/wa7prc-tower
A UFER ground was suggested but I didn't do that because it wasn't
in the plans from the PE.
Per NEC & NFPA, all grounds are tied into the electrical service
ground using 4 AWG, according to instructions from a licensed
electrician.
vy 73,
Bryan WA7PRC
PS: Thanks Hank!
> Date: Sun, 5 May 2013 11:19:22 -0500
> From: Brad W5BK
> Subject: [TowerTalk] Grounding HDX-555
>
> Hello all,
> I am in the process of erecting an HDX-555. I have the
> hole dug and most of the rebar cage built. My question
> is about the best method of grounding. Should I place
> a copper cable at the bottom of the hole and then attach it
> to the tower? This method would have the cable
> immersed in the concrete which makes me wonder about that
> much heat going into the concrete if lightning hits, even if
> it is just on the edge of the concrete. The other
> method I am thinking of would be three ground rods placed
> around the tower and connected together and to the tower
> with copper strap and/or very heavy copper wire. Just
> looking for input from the collective knowledge of this
> group as I am in a lightning prone area in west Texas.
> Thanks.
> Brad
> W5BK
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