More on concrete and....grounding [RE-wrenches]

[David Blecker]

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If this has been covered already in the long grounding threads of past, 
flog me with wet tray cable.

I have "one of those" clients who's re-engineering and challenging most of 
my design decisions for his wind system.  I can live with that in general 
but now he says he wants the ground rods at each of the tower legs (Rohn 
SSV) sunk in the foundation concrete because he was told by "an 
electrician" that you get a better ground that way.  I think he and the 
electrician are nuts.  While I haven't meggered concrete recently, it 
strikes me that it is an insulator - not an conductor -- and would 
therefore offer poor grounding to earth and be a really dumb thing to do.

I'd be happy to be proved wrong and learn something new, so what say ye 
grounding guru's?  Concrete or no concrete?  Thanks!

Dave

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

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