Here, a double pole MCB is used as the Main MCB or Main switch. The single input supply (phase and neutral) is connected to this main MCB. The mains electric box is a square or rectangular box made from plastic or metal that is installed somewhere in our homes. The incoming live electricity feed enters the home and passes through the electricity meter that monitors how much electric we use. The cables then leave the electricity meter. A distribution box is a low-voltage electrical enclosure that receives incoming power and distributes it safely to multiple outgoing circuits through protective and switching devices such as MCBs, RCDs, RCBOs, fuses, isolators, busbars, neutral bars, earth bars, and surge protective devices. The main switch box frequently has a main switch that shuts off all power. If you're installing or replacing a main switch box for residential wiring, small workshops, or outdoor power distribution, start here: For most homes and light commercial setups, a 100A, 12–24-way metal consumer unit with IP65-rated enclosure and integrated SPD (surge protection) is the strongest. The distribution box (DB box) helps safely and efficiently distribute electrical power. But what exactly is a power distribution box, and why is it so essential in our daily lives? The DB panel board controls the flow of electricity. It is usually located in a central area of a building, such as a utility room or basement, and is where the main electrical supply enters the building.