I’m trying to change out an old dimmer switch with a new single pole or 3 way dimmer switch that has a black, red, optional red for the 3 way, and a ground terminal. My old dimmer has two black wires coming out of it and nothing else. There’s a bunch of neutral wires and ground wires in the junction box but none connecting to the dimmer. How do I wire this up? Pictures below. Thanks very much.
In the box the dimmer came in are detailed instructions.
Cap off the red and white stripe wire, hook the red from dimmer to one of the blacks from the wall box and hook the black from the dimmer to the other black from the wall box. You will want to (need to) add a pigtail from the ground bundle in your box to hook up to the ground terminal on the switch. This can be simple if they are wire nutted together- often they are crimped together which is more difficult.