Square D™ Panelboard Interior, 3-Phase, Series: NQ Series, 240 VAC/48 VDC, 225 A, 54 Spaces, QB/QD/QJ/QL Breaker, Bolt-On/Plug-On Breaker Mounting, 4-Wire Wiring Configuration, Copper Bus, Panel Mount, NEMA 1/3R/5/12, Aluminum Housing, 20 in W x 5-3/4 in D x 38 in H