Square D 100A Indoor Main Breaker Plug-On Neutral Load Center is a Type QO load center that comes with a cover and a main breaker already installed for your convenience. Designed with a plug-on neutral feature, it includes a shielded copper bus bar plated for enhanced reliability. This load center features a 100 amp main breaker, making it i for residential, commercial, and industrial power distribution needs. Engineered to support fast installation and wire savings, it is UL listed for safety and performance. The unit supports up to 24 spaces and circuits with a voltage rating of 120V/240V, suitable for single-phase applications. It accommodates wire sizes up to (4) AWG for both copper and aluminum wiring and is designed for indoor use with a combination mount. Model Number: QO124M100PC