From the transformer's low-voltage side (0. 4kV), power is distributed to a main distribution panel (primary distribution box). Understanding the fundamental distinction between Primary and Secondary distribution in electrical systems is pivotal for designing efficient and reliable electrical distribution systems tailored to specific needs across various domains. These boxes feature bottom entry and exit cables, front-opening doors, and main busbars connected with copper strips for optimal contact. It contains safety mechanisms like circuit breakers, neutral and ground bars, and wiring. A distribution boxes acts as the load center and main distributor of electrical power within a building.