More ground rods is better, especially if you have a sizable tower. Look
at the Polyphaser catalog for grounding suggestions. They sell a ground
strap to tower leg clamp, which is just a hose clamp with a piece of
stainless steel spot welded to it to ensure that the copper strap does not
touch the galvanized tower.
John KK9A
To: towertalk@contesting.com
Subject: Re: [TowerTalk] Connecting Tower to Ground Rod
From: "Roger (K8RI) on TT" <K8RI-on-TowerTalk@tm.net>
Date: Wed, 09 Oct 2013 10:12:20 -0400
On 10/9/2013 8:54 AM, GARY HUBER wrote:
Aluminum ground lug on the tower leg bolt, #4 or #6 solid copper to the
ground rod and a #4 or #6 to the MDP or system ground IAW with NEC. All
grounds must be bonded together.
73 ES DX,
Gary -- AB9M
-----Original Message----- From: Michael Warren
Sent: Wednesday, October 09, 2013 5:50 AM
To: towertalk@contesting.com
Subject: [TowerTalk] Connecting Tower to Ground Rod
What standardized method can I use to connect the base of a Rohn 25 to a
ground rod driven into the ground very near the base?
And I'd make that a ground system/network if there is any height to the tower
A single ground rod doesn't provide a lot of protection. I'd consider 1
rod about 3 feet out from each leg a minimum for a 50-60 foot tower with a
tribander on top. Check your code for requirements. They now typically
require two rods at the house entrance. We went to a 200A underground feed
about 10-12 years ago and had to replace the old, single rod with two
about 3 to 5 feet apart IIRC. "I think" there are code requirements for
towers as well
73,
Roger (K8RI)
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