A power unit includes a power distribution member and an interchangeable adapter configured to be deployed in an equipment rack of a distributed computing system. The power distribution member includes multiple power outlets to provide electrical power to a plurality of devices disposed in the equipment rack at a first current rating and phase type configuration, and a first connector having a plurality of first electrical contacts that are electrically coupled to the power outlets. The interchangeable adapter includes a second connector to be coupled to the first connector in which the second connector has multiple second contacts that are arranged to mate with certain ones of the first electrical contacts such that one of a plurality of different electrical power sources having a second current rating and phase type configuration is provided to the power outlets at the first current rating and phase type configuration.