They include standard circuit breakers for lighting, outlets, and major appliances like water heaters and air conditioning units. Residential boxes often feature user-friendly designs with clear circuit labeling. From the meter, the supply goes to the distribution box (distribution board). The energy. 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.