This electrical diagram details the grounding configuration for a dry type transformer with a 480-volt three-phase primary and a 120/208-volt three-phase secondary. Ground lugs inside the transformer housing connect to an equipment ground and a bonding jumper extending to the secondary neutral. A conductor routes from the ground lugs to a ground rod located underneath the transformer. Primary and secondary connections enter and exit the housing enclosure as indicated.
TO GND. ROD UNDER TRANSF. EQUIPMENT GROUND GROUND LUGS TRANSF. HOUSING GND. N GND. BONDING JUMPER SECONDARY PRIMARY 480-3PH 120/208V-3PH
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