Rainproof galvanized steel enclosure. Single phase, 3 wire, insulated/bondable split neutral, 12 (1") spaces 24 poles, 120/240 volt AC. Has notch for No.BRHDK125 hold down kit. With closure plates, hubs and 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 6 main disconnecting means are provided and when not used as lighting and appliance panelboard. Twin neutral with non-removable cross bus. When bonded, unused neutral connections may be used for equipment ground protectors in service entrance application. #1 - 300 kcmil wire. Electrostatic powder coat, baked urethane painted. B2R box 14-5/16" x 18-3/4" x 5-3/16". UL Listed file E52977.