Electrical · E-46N6V

IT Room Power Transformer Riser Diagram

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An electrical riser diagram details the power distribution for the Level 4 South East IT room. A 45kVA transformer steps down 480V to 208Y/120V, 3-phase, 4-wire power, connected upstream through a 150-amp, 3-pole circuit breaker to panelboard EDP4054LI rated at 225A with a 10kAIC rating. Downstream distribution includes a 70-amp, 3-pole circuit breaker and a 3/4-inch conduit with a single number 6 AWG ground conductor connected to earth ground.

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