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Physics, 27.02.2020 03:30 temperent6049
A bare 4 AWG copper conductor Installed horizontally near the bottom or vertically, and within that portion of a concrete foun dation or footing that is In direct contact with the earth, can be used as a grounding electrode when the conductor is at least ft in length.
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A bare 4 AWG copper conductor Installed horizontally near the bottom or vertically, and within that...
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