Grounding rods in HPP

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2010 electrical code says 20 feet of #4 bare copper will do in bottom of footing encased by 2 inches minimum of concrete burial. You can also use 2 pieces of 20 foot 1/2 inch rebar placed in bottom, each bent 90 degrees, with "stub" long enough to penetrate top of slab or footing to connect grounding conductor to rebar with ground clamp. Have each piece of rebar go opposite each other down the footing trench, both poking out together to place clamp around.

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