ground rods in concrete/earth [RE-wrenches]

[David Blecker]

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Matt,

I think the idea with salt is that it provides an abundance of ions to 
increase conductivity as opposed to retaining moisture.  But hey, I had a 
crush on my chem professor and never really paid attention to valence shell 
structure.  Dare I say, take my opinion with a grain of salt?

Dave

At 12:43 PM 4/26/2003, you wrote:
>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

----------------------------------------------------------
David Blecker, P.E., Director
Seventh Generation Energy Systems
608-424-1870 (ph)  424-1810 (fax)

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