Each enclosure is pre-wired, tested, and built to NEC standards, making it easier to deploy safe, compliant power distribution at job sites or permanent facilities. A distribution box, also known as a distribution board, electrical panel, or breaker box, is an enclosure that houses electrical components responsible for distributing electricity throughout a building. It receives power from the main electrical supply and divides it into separate circuits, each. 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. Navigating the world of electrical distribution can be confusing, with terms like panelboard, switchboard, and distribution box often used interchangeably. This. Understand the key differences between distribution boards and boxes—functions, applications, safety, cost, and when to use each one. It helps organize, protect, and control electrical connections in residential, commercial, and industrial electrical systems.