[BC] Lightning

[DANA PUOPOLO]

Yep.

I bore holes that are 20 feet deep if possible and then use old flanged
transmission line for a ground rod. Fill both the line section and the hole
with Magnesium Sulfate (Epsom Salt). Wet then top off with more Epsom Salt.

Four of these will work most anywhere and provide a good ground. I even used
this scheme atop what was basically a 500 foot rock and it seemed to work
okay. 

-D



------ Original Message ------
Received: Thu, 26 May 2005 08:21:40 AM PDT
From: Mike McCarthy <Towers at mre.com>
To: Broadcast Radio Mailing List <broadcast at radiolists.net>
Subject: Re: [BC] Lightning

I know of one instance of this occurring at a telco CO here.  Over time, 
their damage hits increased and they decided to install a new ground 
system.  While opening up the old one, they discovered the original ground 
system had self-insulated from the surrounding ground.  It took place over 
a number of decades, but did happen.

In some installations where the ground is very sandy or very poor, Chem-rod 
type electrodes and added enhanced conductive fill are necessary to insure 
the ground performs properly over time and doesn't self-insulate.

MM

At 05:52 PM 5/25/2005 -0500, you wrote:
>Wow, then how DO you deal with multiple hits in a place like Florida?
>Do you have to rebury the ground rod now and then?  I would think the
>ground resistance meter that the power company folks have would be real
>valuable for you then.  Curious to know the answer!
>
>Kevin Webb
>
>
>Alan wrote:
>"This is especially true here in Florida, Where a ground rod that gets
>hit by lightning can self insulate by turning the sand surrounding it
>into glass."
>
>
> > Second, I really fail to understand why, even with a good and
>effective
> > grounding system, you would not want to avoid as many lightning
>strikes
> > as possible. It's my understanding that every lightning strike
>degrades
> > your grounding system and protective devices, even if only by a tiny
> > bit; but over time, that damage is cumulative. So, if you have the
>money
> > to spend, why not try to eliminate the lightning strikes?
>
>
>
>
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