Electrical · E-FYWPZ

IT Room Power Transformer Riser Diagram

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An electrical riser diagram details the power distribution for a Level 2 IT room utilizing a 45kVA transformer stepping down voltage from 480V to 208Y/120V, 3-phase, 4-wire. Power is supplied from panelboard EDP2088LI rated at 225A, 208Y/120V with a 10KAIC rating through a 150A, 3-pole circuit breaker. A 3/4-inch conduit containing one #6 AWG ground conductor ties into the system grounding. The transformer feeds panelboard TNF2025LI protected by a 70A, 3-pole circuit breaker.

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