ground rods in concrete/earth [RE-wrenches]

[matthew tritt]

Steve,

This is the same idea as the mineral salts-filled grounding tube I
mentioned. The main reason ground rods lose conductivity over time is loss
of moisture in the soil. The salts supposedly maintain conductivity by
keeping the ground around the ground (ground round?) wetter and less
resistant to current. Wouldn't you think that the soil under a nice, big
concrete pad would dry out over time and, therefore, become a less effective
place to ground equipment?

I know that in many communications installations it's common to drive
multiple rods around tower legs, and not under a slab.

Matt T
----- Original Message -----
From: "Steve Willey, Backwoods Solar" <steve at backwoodssolar.com>
To: <RE-wrenches at topica.com>
Sent: Saturday, April 26, 2003 9:49 AM
Subject: ground rods in concrete/earth [RE-wrenches]


> How bout next concrete pour someone donate a ground rod to put in the
concrete.  Then put another in the ground next to it and let it all sit a
month.  Test them to a third rod some distance away with a megger or other
high voltage resistance test and see what they do. Maybe not the same as a
lightning strike but it would yield some starting data.  Or has this been
done and the data just needs to be located?
>
> When I worked for GTE telephone, they actually drilled dry wells under the
microwave towers, dropped in a copper wire, then packed it full with a salt
compound.
> Steve Willey       steve at backwoodssolar.com
> .
>
> [Non-text portions of this message have been removed]
>
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