The GE 100 Amp 12-Space 22-Circuit Main Breaker Indoor Load Center Contractor Kit is pre-packaged with a selection of circuit breakers. The UL-listed load center has holes rated 100% split neutral on each side that are compatible with #14-4 wire. The breaker box is a single-phase, 3-wire unit with a factory-installed main breaker. The center is designed and built for faster installation and a more dependable performance. This unit is compatible with GFCIs, AFCIs, Dual Function and standard circuit breakers.