The main switch in the Distribution Box allows you to cut off power to the entire property at once. Inside, the power is split into multiple, smaller circuits that run to different areas—like the kitchen, bedrooms, lighting, and air conditioning. 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. An electrical distribution box is often called the control hub of a building's electrical system, and for good reason. This box keeps your home or building safe from electrical dangers.