Eaton BR1220B100 1-Phase 3 Wire Main Circuit Breaker Load Center 20 Circuits 120/240 Volt AC 100 Amp NEMA 1 Product description Cutler-Hammer BR1220B100 Loadcenter 120/240 V 100 A 12-Space From the Manufacturer Single phase, 3 wire, insulated/bondable split neutral, 12 (1") spaces, 20 poles, 120/240 Volts AC. Main breaker type BR at 10,000 AIC. Ground bar kit (necessary for sub-feeding) sold separately. Tin-plated aluminum bus bar. Twin neutral with non-removable cross bus connecting them. When bonded, unused neutral connections may be used for equipment ground protectors in service entrance application. #4 - 1/0 wire range. Electrostatic powder coat, baked urethane painted. Rotate 180 degrees for bottom feed;orientation of main breaker handle consistent with NEC 240-81 requirements because it operates horizontally. U.L. Listed file E52977. Features Absence of bolted connections helps to reduce the chance of hot spots and faults for a longer product life Variety of knockouts offer multiple wiring configuration Pre drilled mounting holes provide easy installation of additional ground bar Mount to accommodate top or bottom feed application Standard 14-3/8 in width enclosure fits snugly between wall studs USA SHIPPING estimates delivery times and we work to get your item to you as quickly as possible and within those times, but please know it may take slightly longer than the estimate.