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. 💡 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. What is an Electrical Distribution Box?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. This metallic enclosure receives the incoming power supply from the utility company and organizes it for use throughout the building.