The main switch, or main breaker, controls the entire electrical supply to the distribution box. It's typically rated for the maximum current capacity of the electrical. A distribution box uses MCBs, RCDs, and busbars to protect circuits, prevent shocks, and ensure safe power distribution in homes and buildings. You use a distribution box to divide electrical power into smaller circuits. It ensures that circuits are safe, organized, and easy to manage. Inside, you'll find parts like circuit breakers and fuses that protect the system from problems like overloads and short circuits.