an electrical busbar arrangement has provision for connecting a single feeder cable to a plurality of branch cables within an insulating housing . a branch port is provided for each branch cable , and a spring - loaded slidable support plate is arranged to receive the branch cable and to retain it in an aperture thereof . the support plate moves within a cable holder that is driven by a rotatable cam by means of a switch . operation of the switch between off and on positions is effective to move the branch cable into and out off contact respectively with the busbar . the switches of each port are selectively operable independently of each other . in this way , branch cables may be independently and selectively mounted in the housing and brought into electrical connection with and disconnected from the busbar .