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  1. robthecob

    Parallel cables routed in tray-200 amp ground currents

    We are measuring 200 amps in the ground conductors from the 480 volt substation ground bus to the MCC ground buses. The 480 volt sub is a double-ended substation with two 3000 kVA 12.5kV-480 volt transformers. Each half of the substation powers three 1600 bus MCCs, each with 1000 amps of load...

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