Importance

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Abstract

An overhead raceway or duct is pre-wired with six conductors, including two hot legs and two switch legs. Identical six socket receptacles are spaced along the raceway, the corresponding sockets of each receptacle being pre-wired to the same conductors. There is also provided a plurality of whips or pre-wired cables having identical six-prong plugs on the opposite ends thereof for selectively connecting the lamps either directly to the hot legs for continuous energization or else indirectly to the hot legs through the switch legs and a wall switch so that the energization of a lamp is under the control of the switch. The lamp fixtures are provided with the same identical six-socket receptacles which are wired to the two ballast circuits in each fixture. Thus, lamp fixtures may be easily connected to the raceway for either mode of operation without the need for making any wiring changes. If a wall partition is moved to change the size of a room and, thus, the number of lamp fixtures to be controlled from the wall switch, the lengths of the switch legs can be easily changed by either splicing or cutting them to increase or reduce, respectively, the number of lamp fixtures controlled by the wall switch via the switch legs.

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First Claim