Power distribution cabinet

A power supply module, 10, included in a power distribution cabinet distributes power from one or more power sources to a plurality of internal cabinet modules. The power supply module includes a plurality of input terminals, 12a, 12b, 12c, each input terminal connected to a different power source, wherein availability of each of the plurality of power sources varies during operation of the aircraft or vehicle. A plurality of output terminals, 14a, 14b, 14c, connected to one or more of the plurality of input terminals to provide an output that represents a combination of selected power sources.