Open Installation: In this configuration, the distribution box is mounted on the surface of walls or panels. To find it quickly, look for a rectangular gray metal box about the size of a medicine cabinet, often positioned close to. Distribution boxes, or electrical junction boxes as they are sometimes called, play a vital role in electrical systems. Whether in a home or an industrial facility, this box keeps your electrical setup organized, functional, and efficient. It receives power from the main electrical supply and divides it into separate circuits, each. 💡 Quick Answer: An electrical distribution box is a metal enclosure that houses circuit breakers or fuses, distributing incoming electrical power to individual circuits while providing overcurrent protection and a safe disconnection point for maintenance.