Lightning protection [RE-wrenches]

[Travis Creswell, Ozark Solar]

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How does one drive a ground rod 80'?  I feel special when I get one down
7.5' around here.  Must be very sandy soil which explains the need for such
a long ground rod.

In trouble spots around here the utilities will auger a hole in the soil
then pack it with bentonite (sp?) clay and drive the ground rod in that.
It's the same stuff that we line farm ponds with to hold water.  My
understanding is this keeps a good ground year round especially in the late
summer when the soil gets very dry.

That might be a solution for some folks.

Travis


-----Original Message-----
From: Darryl Thayer [mailto:daryl_solar at yahoo.com] 
Sent: Monday, July 25, 2005 9:19 AM
To: RE-wrenches at topica.com
Subject: RE: Lightning protection [RE-wrenches]

The soil was sandy, the site was remote from the stand
alone house, the house had a well, but the site 600
feet away did not.  Originally the lightening would
travel via the inverters to the house and well. 
frying the inverters.   

I drove two sets of 3/4" sectioned ground rods, I meet
the specification at about 40 feet but I drove to 80'
for safety.  I used two rods so I could get the ground
resistance measurements between the rods. 
 Darryl

--- Drake Chamberlin <solar at ecoisp.com> wrote:

> Your free subscription is supported by today's
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> 
> >   I solved these problems by making sure the
> >ground rod system was up to specs, i.e. the
> resistance
> >to ground was less than 0.1 ohm.
> 
> How many rods did you use to achieve this?  Did you
> have a well casing or 
> water pipe?
> 
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