Learn how to identify a blown fuse in your distribution box. Find signs, test methods, and replacement tips for safe and effective troubleshooting. 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 fused distribution box helps you use electricity safely at home, in a car, or at work. This device sends power to different circuits. It uses fuses to stop damage if there is too much power. The distribution box is important for keeping your appliances safe. Many. A fusebox, also sometimes known as a consumer unit, should be easy to find and is where the electricity in your home is controlled and distributed.