They consist of a rigid enclosure housing busbars, circuit breakers, fuses, and wiring terminals. The design emphasizes safety, enabling easy access for maintenance while preventing accidental contact with live electrical parts through secure covers and lockable doors. Today, electrical systems are essential for homes and industries. 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. Learn about the main parts in a distribution box. Each part. This ultimate guide explains what a distribution box does, its internal components, common types, real-world applications, and how to select the right DB Box for your project.