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. 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. 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. A panelboard is a distribution assembly designed to divide an incoming electrical feed into numerous smaller branch circuits. Each circuit is protected by its own circuit breaker. You will typically find panelboards in residential, commercial, and light industrial settings, often flush-mounted on. A distribution board or distribution panel (DP) is an important part of an electricity supply system. Its job is to split an incoming electrical power feed into multiple secondary or subsidiary circuits. In. Distribution boards, often referred to as electrical panels or breaker boxes, serve as the nerve center of any electrical system.