Unlock the ultimate resource for your electrical and mechanical projects with our premium collection of Distribution Box drawings, available now for free download on MechStream. 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. Each component plays a specific role. Smart DB boxes have extra parts like energy monitoring units and communication modules. Distribution box The system diagram usually shows the electrical connection and configuration inside the distribution box in a graphical way, including busbars, circuit breakers, fuses, load devices and other elements. SMART DISTRIBUTION BOXES FOR FLEXIBLE BUILDINGS.