Square D™ Panelboard Interior, 3-Phase Bottom, Series: NF Series, 480Y/277 VAC, 600Y/347 VAC, 400 A, 30 Spaces, EDB/EDG/EDJ Breaker, Bolt-On Breaker Mounting, 4-Wire Wiring Configuration, Aluminum Bus, Panel Mount, NEMA 1/3R/5/12, Aluminum Housing, 20 in W x 50 in H