Single phase, 3 wire, insulated/bondable neutral, 2 (1 in ) spaces, 4 poles, 120/240 volt AC. No. GBK5 or No. GBK520 ground bars and doors sold separately. Tin-plated aluminum bus bar. In accordance with NEC, suitable for use as service equipment when not more than 2 service disconnecting mains are provided or when not used as a lighting and appliance panelboard. Neutral is movable to other side. When bonded, unused neutral connections may be used for equipment ground protectors in service entrance application. #8 - #2 wire range. Electrostatic powder coat, baked urethane painted. Rotate 180° for bottom feed. Style 5 box 4-1/2 in x 9-7/16 in x 3 in UL Listed file E8741.