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. Look at this table to see how types of distribution boxes match their materials and uses: You will see that picking the right electrical distribution box types depends on your space and project needs. Some types, like the residential DB, are best for homes. 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. The. This ultimate guide explains what a distribution box does, its internal components, common types, real-world applications, and how to select the right DB Box for your project. We also highlight how reliable manufacturers like NUOMAK support stable, compliant, and cost-effective power distribution. A distribution box is an electrical enclosure that receives power from a main supply and distributes it to multiple protected branch circuits.