Switchboards are freestanding units that can be front connected and which would require only front access, similar to panelboards. The distribution boxes can be incorporated in the luggage compartment, in the engine compartment and behind the glovebox. Even a combination of all three installation locations is possible, such as e. In the E7x and F0x vehicles, there are two separate distribution boxes. One is under the hood and handles most of the major systems like the engine, transmission, and. 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. The NEC defines a panelboard as: “A single panel or group of panel units designed for assembly in the form of a single panel, including buses and automatic overcurrent devices, and equipped with or without switches for the control of light, heat, or power circuits; designed to be placed in a. The distribution box (DB box) helps safely and efficiently distribute electrical power. 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.