A distribution box is not just an empty plastic or metal enclosure. It is an electrical assembly where protection, isolation, power distribution, neutral return, earthing, and surge protection must work together. The internal structure determines safety as much as the outside. 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.