Distribution circuits, also known as express feeders or distribution main feeders, carry low-voltage power from the distribution substations to transformers closer to customer sites that further reduce the voltage and feed power to secondary circuits that serve residential. Distribution circuits, also known as express feeders or distribution main feeders, carry low-voltage power from the distribution substations to transformers closer to customer sites that further reduce the voltage and feed power to secondary circuits that serve residential. Every wire in your home — every socket, every light, every appliance circuit — traces back to a single grey box on the wall: the distribution board, also called a consumer unit or, in older installations, a fuse box. It is the most critical component in any electrical installation, and. 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. The. The physical division of power from the bus bars is achieved through the use of circuit breakers, which plug directly into the conductive strips within the central distribution hub. A circuit breaker functions as an automatic, current-limiting switch, designed to interrupt the flow of electricity. Electric power distribution is the final stage in the delivery of electricity. Electricity is carried from the transmission system to individual consumers. Most share many common characteristics.