A distribution box, or DB box, is a circuit breaker enclosure. It is a vital part and central hub of any electrical system. The hub distributes electrical power from a single input source to various circuits throughout a building. Understanding its significance. In this guide, we'll break down the 12 main types of distribution boxes in a way that's easy to understand. We'll chat about what each one does, where it shines, and then dive into how to choose the perfect box for your needs. We also highlight how reliable manufacturers like NUOMAK support stable, compliant, and cost-effective power distribution. A distribution boxes acts as the load center and main distributor of electrical power within a building.