An electrical power control system comprising: an enclosure for housing an electrical power component support and a main power bus for routing main power through the enclosure; a prewired connector assembly disposed in the enclosure and configured to receive data signals from a network and control power from a power source; and a component support disposed in the enclosure, the component support having a component connector assembly (28, 82) supported thereon engageable with the prewired connector assembly to provide the data signals and the control power to components supported by the support, the component support being engageable with the main power bus by means of stab connections to provide main power to driven loads; wherein the component connector assembly (28, 82) is movable within a predetermined range to maintain a non-sliding contact between the connector assemblies (28, 82, 50) when the component support is moved from a fully-engaged position, in which the main power is coupled to the component support, to a position partially retracted from the enclosure, in which the main power is uncoupled from the component support, characterized in that each of the prewired connector assembly and the component connector assembly (28, 82) includes a plurality of connectors (54, 56, 70, 72, 96), wherein the plurality of connectors (70, 72) of the component connector assembly (28, 82) are matable with the respective connectors of prewired connector assembly and supported on a common connector support plate that is biased within the predetermined range, together with the connectors (70, 72) supported thereon, by means of a biasing member towards an engaged position, wherein the component connector assembly (28, 82) includes a base (62, 84) fixed to the component support, and wherein the common connector support plate is secured to but movable with respect to the base (62, 84) via at least one disengagement member, the disengagement member causing the connectors of the common connector support plate to be unmated from respective connectors of the prewired connector assembly when the support is displaced beyond the predetermined range. an enclosure for housing an electrical power component support and a main power bus for routing main power through the enclosure; a prewired connector assembly disposed in the enclosure and configured to receive data signals from a network and control power from a power source; and a component support disposed in the enclosure, the component support having a component connector assembly (28, 82) supported thereon engageable with the prewired connector assembly to provide the data signals and the control power to components supported by the support, the component support being engageable with the main power bus by means of stab connections to provide main power to driven loads; wherein the component connector assembly (28, 82) is movable within a predetermined range to maintain a non-sliding contact between the connector assemblies (28, 82, 50) when the component support is moved from a fully-engaged position, in which the main power is coupled to the component support, to a position partially retracted from the enclosure, in which the main power is uncoupled from the component support, characterized in that each of the prewired connector assembly and the component connector assembly (28, 82) includes a plurality of connectors (54, 56, 70, 72, 96), wherein the plurality of connectors (70, 72) of the component connector assembly (28, 82) are matable with the respective connectors of prewired connector assembly and supported on a common connector support plate that is biased within the predetermined range, together with the connectors (70, 72) supported thereon, by means of a biasing member towards an engaged position, wherein the component connector assembly (28, 82) includes a base (62, 84) fixed to the component support, and wherein the common connector support plate is secured to but movable with respect to the base (62, 84) via at least one disengagement member, the disengagement member causing the connectors of the common connector support plate to be unmated from respective connectors of the prewired connector assembly when the support is displaced beyond the predetermined range.