I am having trouble figuring this out. Attached is a diagram, best I could do given the tools I have. Please remember I am not an electrician so explain like I am 5 please. In a nutshell, the 14/2 hot from the breaker comes into the electrical box where the Claro 3-way switch is located. The Claro has 4 screws — copper, ground and 2 silvers. Out of that box goes the 14/2 to the light fixtures and the 14/3 to the other side of the room where the Diva Dimmer is located. The Diva has 4 wires already attached – black, red, red/white and green. Now ground goes to ground so that part I have figured out, but I am unsure of the correct setup here. All the diagrams I can find have the Lutron dimmer first or are just for two conventional 3-way switches and that is confusing me for this setup. Thanks for any help that can be given or if someone has a diagram for this. -Alan
Best Answer
In many 3-way diagrams you will have the feed come in to one switch, and the outgoing wire to the light at the other switch. You have the feed and the output in one box, so you need an extra hot wire to go between the two boxes. Because you have a green wire, I think you might have conduit. If that is the case, the best option is to run another colored wire between the two switches to act as the common wire to the Diva.
If you cannot run an extra wire, you can use the white wire as the common return, and you note that by marking the white wire with black tape (because it will be a hot wire in this scenario).
In either case, the wire connections should be as follows. On the Claro, connect the black wire that is the power into the box to the different-colored screw on the outlet. The red and black "travelers" that go from box to box will connect to the other two screws. The whites from the feed and the output to the light should be connected together. The common return (new wire or black taped white wire) will get connected to the black wire that goes to the light.
In the Diva box, the taped white wire will go to the different-colored screw, and the red and black get connected to the other two screws. And of course, all grounds get tied together and attached to the two switches.