If you can get a wire up against the house, but in the dirt just under
the surface, you can create a halo ground bonding of all the ground rods
around a house. Our local utility developed a computer program that
modeled the losses and in our rocky soil, 10 gauge wire was adequate for
a sub station, so that should work for a house. It bonds as it passes
each ground rod, like main electrical service, telephone entry, cable
TV, etc.
The size of conductor can vary depending on your total halo length
circling the house. And on your local ground character as to earth
resistance, moisture content, etc.
If you have the area of a 1500 sq. ft. house circuled with no. 10
bonding all the earth rods, you may not need incremental rods, and the
soil under you may prevent many rods being driven. In our local cases
rock is often 18 inches below surface!
-Stuart Rohre
K5KVH
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