A main switch box, a distribution board, a breaker panel, an electric panel, or a breaker board is a metal enclosure that houses the main power feed from the utility company and distributes it to individual circuits in your home. It receives a single, high-amperage power feed and divides it into multiple. What is an electrical switchboard? Switchboards are used to safely distribute electricity throughout commercial and industrial facilities. But what exactly is a power distribution box, and why is it so essential in our daily lives? The DB panel board controls the flow of electricity.