One-piece interior removes and reinstalls easily. Full-length neutrals are easier to wire, reducing installation time and cost. 100 percent neutral terminations. Sturdy copper bus and galvanized box increase durability and reliability. Combination slotted/Robertson screws speed wiring. All holes are rated for 14-4 wire. 100 per cent rated split neutral on each side. Load centers accept Q Line circuit breakers, including GE's exclusive 1/2" THQPs. (4) 1" or (8) 1/2" spaces. Single-phase, three-wire, 120/240 Volt AC. 7-1/4" x 10" x 3-3/4".