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Re: [TowerTalk] Fwd: Grounding connection to tower legs

To: towertalk@contesting.com
Subject: Re: [TowerTalk] Fwd: Grounding connection to tower legs
From: Clay Autery <KY5G@montac.com>
Date: Mon, 16 Oct 2017 18:32:41 -0500
List-post: <mailto:towertalk@contesting.com>
On 10/16/2017 6:18 PM, jimlux wrote:
On 10/16/17 3:44 PM, Clay Autery wrote:

Just off the cuff, I think this would be overkill for *lightning protection*, which is why you don't see this approach in the usual commercial radio installation handbooks (e.g. R56)

you don't worry so much about low resistance or contact area - if it's reasonably close, the lightning current will arc from one to the other and a high current spark is VERY low impedance.

And with a long strap, if it does arc underneath, you've got somewhere for pressure to build up.

What *is* important is mechanical strength - as Jim K9YC pointed out,
Well...  For me?  When I have many thousands of dollars in equipment at risk, there is no such thing as "overkill".  :)

Anything I can do to pump as much of the strike into the ground prior to entry into the shack, and thence to reduce the step potential, I will do.  :)
It doesn't take that much "extra" to do a job right.

Who said anything about a "long strap"?  I was responding to the man's question about the clamp... But since you bring it up.... yes...  a strap as wide as I can make work, AND as short as possible and of sufficient mechanical strength to stand up to the forces imparted. Apologize...  I assumed that those were givens.  <big smile>

73,

______________________
Clay Autery, KY5G
MONTAC Enterprises
(318) 518-1389


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