Square D by Schneider Electric QO2100BNRB QO 100 Amp Two-Pole Outdoor Enclosed Circuit Breaker, QO 100 Amp Outdoor Circuit Breaker Enclosure PKOGTA-2 ground bar kit and B-Hubs sold separately Not for use with single-pole breakers. Two-pole QO, QO-GFI, QO-AFI,QO-EPD and QO-PL circuit breakers sold separately Type-3R enclosure for outdoor use Single-phase, 100 Amp , 120/240 Volt AC rated