The main switch, or main breaker, controls the entire electrical supply to the distribution box. It's typically rated for the maximum current capacity of the electrical. What is the difference between a distribution board/distribution box, main switch, and mains? Are they all the same or are they difference from each other? Are you asking about a location that has multiple occupancys? Up to 6 disconnects? Going to a panel board at each residence? They're slang. 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. Switchboards are essential in all electrical systems and are connected to the main cables that deliver the electrical current from the transformer or generator into a facility. The central hub manages and distributes your house's electrical circuits. It also contains safety devices such as fuses, circuit breakers, and residual current devices (RCDs) that protect you and your appliances from electric shocks. In any electrical system, the distribution box is the heart and brain, a critical component that safely manages and distributes power from the main source to various circuits.