Square D™ QO® Main Breaker Load Center, 3-Phase Convertible, 208Y/120 VAC/240/120 Delta VAC/240 Delta VAC, 200 A, 42 Pole, 25 kA Interrupt, 42 Circuits, Bolt-On Breaker Mounting, 4-Wire Wiring Configuration, 42 Spaces, 4 AWG to 300 kcmil Wire, Surface/Plug-On Mounting, NEMA 3R Enclosure, NEMA 14R Enclosure Box, Steel Housing Material, 14.76 in W x 39.37 in H Dimensions