It is used in the AC 50Hz power, lighting and circuit systems with the voltage of 500V and below for power distribution control, monitoring and metering protection, mainly suitable for many places such as industrial and civil buildings, industrial and mining enterprises . It is used in the AC 50Hz power, lighting and circuit systems with the voltage of 500V and below for power distribution control, monitoring and metering protection, mainly suitable for many places such as industrial and civil buildings, industrial and mining enterprises . A distribution box, also known as a distribution board or panel, is the central unit that distributes incoming electrical power to various circuits. The primary role of a distribution box is to take the main incoming supply and divide it into smaller circuits. It helps organize, protect, and control electrical connections in residential, commercial, and industrial electrical systems. A. ype, a “R” is added after the Specification. For single row 20, and circuit 24, fter confirming the wires meet the requirements. For any damage due to one of the following. Whether you're moving between terminals, leaving the airport via pick-up areas, or headed to public transit, rental cars, or a hotel shuttle, the AirTrain is the easiest way to get around JFK. JFK's AirTrain connects you to parking areas, the Long Island Rail Road (LIRR), New York City Subway and. JXF Series Power Distribution Box product is box assembled with various control functions by customer-selected components, and there are many box sizes and specifications and the size of the box can be customized according to the size of the installation elements.