Terminal layout and switching pattern single phase and three phase reversing drum switch single phase reversing drum switches 115vac or 230vac model number wire size screw terminal maintained spring return min max tlghtenlng torque cw0177859s35 cw0177860s35 18 awg 12 awg 11 in lb. Bremas boat lift switch wiring diagram just what s wiring diagram. A wiring diagram is a kind of schematic which uses abstract photographic signs to show all the affiliations of components in a system.