Steel enclosure Single phase, 3 wire, split neutral, 20 spaces, 20 circuits, 120/240 volt No.PK15GTA ground bar sold separately Slot/square drive screws, 3 ground bar mounting locations Straight in main design Tangential main service knockouts No.4 -2/0 AWG main wire Rotate 180 degrees for bottom feed QOMA1 Main Frame Size: Convertible to 22,000 AIR main breaker with No.QOM125VHCP main circuit breaker for 125 amp frame, No.4 - 2/0 AWG main wire size Style 5 Box - 14.25 in. x 26.25 in. x 3.75 in. UL Listed