I'm trying to replace an existing single pole switch with a dimmer switch for a 4 bulb vanity light. Trying to replace with a Lutron DVCL-153PR-WH switch. Upon opening the box I am faced with 2 red wires and a yellow wire. No ground and the beige wire is capped off in the box. New switch has a red, black, red/white striped, and green ground wire coming off it. Existing switch appears to be single pole as it doesn't control anything else except vanity light. The presence of the 2 red and a yellow is throwing me off. Looking for some help. I have included photos:
Whites are neutral. If your new switch needs neutral, add a short white wire (pigtail) and connect it to the others.
Metal conduit + metal boxes = strange wire colors and grounded automatically. All switches, better quality receptacles ground automatically with metal boxes.
In the old switch, one red is incoming hot, one is outgoing hot, yellow is switched hot.
- Connect the two reds to black of the new switch with a wire nut.
- Connect yellow to red of the new switch.
- Cap the striped red.
- Connect the green ground wire from the new switch to a grounding screw in the metal box. If the green wire is removable (not clear with a quick look at the instructions) then you can remove it as the switch will ground to the metal box through the yoke.