A number 4/0 bare copper grounding ring encircles the transformer pad and connects to three-quarter-inch by ten-foot ground rods at typical intervals using exothermic welds. The transformer connects to the transformer ground grid and bonds directly to the transformer ground terminal.
#4/0 BARE COPPER GROUNDING RING 3/4" X 10' GROUND ROD (TYPICAL) EXOTHERMIC WELD (TYPICAL) BOND TO XFMR GROUND TRANSFORMER TO THE TRANSFORME R GROUND GRID
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