A distribution box has several important parts. Each part does something special: Main Switch: This switch controls all electricity coming into the box. Busbar: A metal strip spreads power to each circuit. 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. Today, electrical systems are essential for homes and industries. A distribution box uses MCBs, RCDs, and busbars to protect circuits, prevent shocks, and ensure safe power distribution in homes and buildings. This box keeps your home or building safe from electrical dangers. This article discusses the construction of the distribution box, its functional divisions. A distribution board (also known as panelboard, circuit breaker panel, breaker panel, circuit breaker, electric panel, fuse box or DB box) is a component of an electricity supply system that divides an electrical power feed into subsidiary circuits while providing a protective fuse or circuit. A distribution box is a key part of electrical systems in buildings.