Cutler-Hammer Three-Phase Loadcenter, Main Breaker, 208Y/120/240 VAC, 400 A, 22 kA Interrupt, 42 Circuits, 42 Spaces, 3/0 AWG to 250 kcmil Wire, Surface Mount, NEMA 1, 66.5 in H x 16.22 in W x 6.31 in D Enclosure Box, Aluminum Housing, 58 in L x 19 in W x 7-1/2 in H