A 75KVA mechanical power transformer stepping down 480V to 208Y/120V 3-phase 4-wire power connects to panel board EDP5000LM rated at 400A with a 250A 3-pole breaker. A 3/4-inch conduit with one number 2 AWG ground conductor ties into the transformer grounding system. Feeders route through circuit designations 003W and 003X.
3/4"C-1#2AWG GND MECHANICAL POWER PANEL BOARD LEVEL 5 MECHANICAL ROOM TNF5002LP MECHANICAL POWER TRANSFORMER 75KVA 480V-208Y/120V 3PH, 4H, %IZ=3.5 LEVEL 5 EDP5000LM 400A, 208Y/120V 3PH, 4W, 10KAIC 250A 3P 003W 003X
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