Abstract: A power interface box is provided having a base housing an AC and a DC bus on which a plurality of separate power supply units are adapted to be positioned and interconnected to the buses in the base. A source of AC potential is applied to the AC bus for providing a source of power for the apparatus. A plurality of first female connectors are mounted in the base and coupled to the AC and DC buses. A plurality of face plates each having second male connectors mounted therein are each adapted to house a regulated power supply and to be mated with the first connector for coupling the power supplies positioned on the base to the AC and DC buses. Back studs extend from the base which are connected to the DC bus for distributing power from the power interface box.