Abstract: A safety disconnect switch for mounting on a utility pole to serve as an anchor at one end of a suspended service entrance cable extending to a remote building, so as to first disconnect the cable and then drop it harmlessly to the ground upon an excessive tension force being applied to the cable by a falling tree or the like. This device includes a movable terminal clamping means or slider that joins the termial ends of the wires of the suspended cable to the bus bars of the incoming power supply lead wires. A detent switch mechanism or means holds the movable terminal clamping means in either a first fixed position or a second cable-released position. The detent switch means also includes a locking means and a trigger means to open the locking means upon a predetermined tension force being exerted on the suspended cable.