Wiring an outlet split switch, commonly called a combination switch-outlet, allows an additional outlet to be added anywhere there is a standard wall switch. The combination switch-outlet installs without having to cut holes in the walls, run new wires and install new electrical boxes and receptacles. The combination switch-outlet is wired to the fixture, as with a standard switch, and the outlet can be configured to be controlled by the switch as well, or constantly energised.
Things you need
Circuit testerTwo pieces of 14-gauge black electrical wire, 6 inches eachOne, 6-inch piece of 14-gauge white electrical wireElectrical pliersTwo large wire nuts
1 Turn off the power to the circuit off the service panel, then check to be sure the current is off with the circuit tester. Remove the old switch or receptacle, if installed.
2 Strip ½ inch of insulation from both ends of the two black wires with the electrical pliers. Attach one end of each black wire to the hot (black) wire, creating a three-wire connection. Secure with a wire nut. Break the metal tab connecting the hot (black) terminals of the switch-outlet. This will allow the outlet to stay energised while the switch is off. If you want the switch to control the outlet as well, do not break the tab.
3 Orient the switch-outlet so that the switch is in the top position. Attach one of the two hot wires to the brass screw on the left side of the switch, then connect the other hot wire to the black screw on bottom right, adjacent to the outlet. If you want the switch to control the outlet as well, omit the black (hot) jumper wire to the bottom black screw.
4 Connect the hot (black) wire leading to the fixture to the black screw on the top right of the switch.
5 Strip ½ inch of insulation from both ends of the white wire. Attach one end to the silver screw to the bottom left, adjacent to the outlet. Connect the other end to the to white (neutral) wires from the fixture and power source, creating a three wire connection. Secure with a wire nut.
6 Connect the ends of the bare ground wires together with a wire nut and attach the remaining loose end to the green screw on the switch-outlet.
7 Attach the switch-outlet to the box and screw on the cover plate. Turn on the power and test the switch and outlet.