The Square D QO 100-A 24-Space 24-Circuit Main Breaker Plug-On Neutral Load Center is a black ABS/plastic load center designed for wall mounting in interior rooms. With a maximum amperage of 100A and 24 spaces/circuits, this main breaker features a plug-on neutral design for easy installation. The compact rectangular box is suitable for any room and has a voltage of 120/240V. Manufactured in the United States, this load center from Square D offers reliable on/off operation with a switch control style.