The main function of a Distribution Box is to act as a central hub. Inside, the power is split into multiple, smaller circuits that run to different areas—like the kitchen, bedrooms, lighting, and. A distribution box, often simply called a DB, is a crucial component in any electrical installation. It helps electricity move safely to different circuits, ensuring that power is utilized efficiently. Also called a distribution board, panel board, breaker panel, or electric panel, it is the central hub in an electrical system that divides incoming power into various subsidiary circuits.