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. 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. A power distribution box is a key part of any electrical system—it's the place where electricity from a main source gets divided and sent out to different circuits. You might also hear it called a PDU (Power Distribution Unit), distro, or distribution panel depending on the setup and environment. Here are the main parts and their functions: Circuit Breakers (MCBs): These act as automatic protectors. Fuses: Like breakers, fuses guard against overcurrent but melt when triggered and. Indication Lights: These provide visual availability and status of mains power supply. They act as the central location where electrical energy is given out and routed to different circuits in a building or facility.