Cutler-Hammer Main Circuit Breaker Load Center, 3-Phase, 208Y/120/240 VAC, 150 A, 30 Poles, 10 kA Interrupt, CC Breaker, Plug-On Breaker Mounting, 4-Wire Wiring Configuration, 1 to 4/0 AWG Wire, Flush Mount, NEMA 1, NEMA L Enclosure Box, 39 in L x 14.31 in W x 3.88 in H