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. A distribution box ensures that electrical supply is distributed in the building, also known as a distribution board, panel board, breaker panel, or electric panel. The boxes also store protective equipment devices. In this article, we'll walk you through the step-by-step process of how power flows through a distribution box, what components are involved, and why each part is critical for maintaining a stable and secure electrical system.