A modular power distribution system is provided for distributing power within an equipment rack. A control unit is mounted within the rack having a power input connected to a power source and a converter for converting the input power to a power supply for the rack equipment. The control unit includes a housing and power outlets are provided for electrical connection to the control unit and distributing the converted power supply to the equipment. One or more extension bars are mounted within the rack adjacent a corner support of the rack. The extension bar includes a power inlet and is connected via an electrical conductor to one of the power outlets of the control unit. The extension bar includes a number of power outlets (such as up to or more than 8) adapted for electrical connection to power supply lines (cords or hardwiring) from the rack equipment.