On a smart switch, the red wire often connects to the switch leg to control a light or other load. Within an electrical box, a red wire may be a traveler, a switch leg or the second hot of a 240 ...

5. Connect your outlet Strip the ends of your wires clean to about ¾ on an inch and attach the black wire that goes to the light switch and a black jumper wire to the power source with a wire nut ...