On 5/25/11 6:02 PM, john@kk9a.com wrote:
> You're lucky. I got no where trying to install ground rods with a sledge
> hammer in my shale and clay soil. I used a large electric jack hammer to
> install them and even with this machine I was only partially successful.
>
Just such situations is what prompted Herb Ufer to invent the concrete
encased grounding electrode. You have to dig the foundation anyway, why
not use it for your ground.
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