The present invention is directed to an electrical wiring system for use in an AC electrical power distribution circuit including at least one first AC power conductor disposed between an upstream AC power element and a device box and at least one second AC power conductor disposed between the device box and a downstream AC power element. The at least one first AC power conductor and the at least one second AC power conductor are routed into an interior portion of the device box and accessible via a front open face of the device box. The system includes a connector device including a connector housing having a plurality of connector contacts disposed therein. The plurality of connector contacts are coupled to termination structures configured to couple the at least one first AC power conductor and the at least one second AC power conductor to corresponding contacts of the plurality of connector contacts. An electrical wiring device includes a device housing having a front portion and a rear portion. The front portion includes at least one user-accessible control element disposed thereon. The at least one user-accessible control element is coupled to an electrical switch mechanism disposed in the device housing and coupled to a plurality of device contacts. The plurality of device contacts are accessible by way of a device connection arrangement formed in the rear portion of the device housing. The plurality of device contacts are configured to mate with the plurality of connector contacts when the connector device is coupled to the device connection arrangement.