To be truly effective, the driven ground rod needs to contact bedrock (we have none), ground water, or at minimum damp soil (possibly) testing in Florida has shown that the rod in contact with reenforcing steel to be most effective. This came from a licensed electrician ( like hen's teeth around here). Personally I would love to see a true megger test to see how really effective the ground system really is.
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........American by birth....Union by choice
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