A single phase distribution box helps control and share electricity in your home or business. The main parts inside are circuit breaker s, neutral and earth bars, and safety devices. High-quality materials and robust product designs ensure a reliable connection, signal transmission and power. A distribution board (also known as panelboard, circuit breaker panel, breaker panel, circuit breaker, electric panel, fuse box or DB box) is a component of an electricity supply system that divides an electrical power feed into subsidiary circuits while providing a protective fuse or circuit.