Rainproof galvanized steel enclosure. Single phase, 3 wire, insulated/bondable movable neutral, 2 (1 in ) spaces, 4 poles, 120/240 volt AC. With closure plates, hubs and No.GBK5 or GBK520 ground bar kits (necessary for sub-feeding) 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. 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. 4-1/2 in x 9-7/16 in x 3 in UL Listed file E8741. Style 5R box.