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. Just as a heart receives blood and pumps it to various parts of the body, the distribution box receives the main electrical supply and. An electrical distribution box is a centralized unit responsible for distributing electrical power across multiple circuits within various environments, including residential, commercial, and industrial settings. A substation generally contains transformers, protective equipment (relays and circuit breakers), switches for.