Electrical · E-HPDC2

Level 4 South Electrical Room Power Distribution Diagram

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A mechanical power distribution board designated EDP4031LM rated at 400 amperes, 208Y/120V, three-phase, four-wire, 10 kAIC connects through a circuit breaker to a mechanical power transformer. The 75 kVA transformer steps down voltage from 480V to 208Y/120V three-phase, four-wire with an impedance of 3.5 percent and includes a grounding conductor run in a three-quarter-inch conduit. Downstream of the transformer, a feeder supplies a second distribution board designated SWB4027HM rated at 1200 amperes, 480Y/277V, three-phase, four-wire, 65 kAIC.

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