Hi, I am running into some wiring problems as I try to map out a 3-way z-wave light switch in my living room, using a Linear WD500Z Wall Dimmer Switch and a Linear WT00Z auxiliary switch. I have looked at existing posts and have found very helpful threads on 3-way dimming, particularly @chrisb for the wiring diagram, and this post here, but my existing wiring setup has me really confused. Apologies in advance if I include too much/too basic information!
This is where I am so far:
Junction Box #1
Is a multi-gang box that houses 3 total switches on the same circuit, with a total of 6 separate lines of Romex going into/out of the box. The old switch I’m replacing is a simple on/off toggle switch. I’ve disconnected and capped four wires from the old switch: 2 black, one red, one ground. After throwing the breaker back on, my non-contact voltage meter gets a live reading on one of the black wires AND the red wire. The other black wire (which was connected to the black screw on the old switch), does not get a reading. There is a bundle of white wires capped in the back of the box, but the old switch was not wired to this bundle. Hoping this is my neutral bundle, to power the Linear.
Junction Box #2 (This is where it gets weird to me)
Is a single gang box with one toggle/dimmer switch, with only a single romex cable going into the box. Since there is only one romex in the box, there are only the usual 4 wires here: red, white, black, and ground. The white wire was connected to the Common screw terminal; the red and black wires were connected to the remaining two screws. After capping each wire, with the breaker on I get a reading from the black, the white, AND the red wire. All of the other regular 3-way setups I’ve seen online have TWO romex going into/out a single junction box. And I don’t understand how all three of the wires are live.
1). In Box #1, how do I use my multimeter to determine which wire is the Line, Load, and Neutral wire for the WD500Z-1? Both the capped red and one of the black wires are live, according to my non-contact sensor.
2.) How can all three wires be live in Box #2? What can I do to troubleshoot this to determine which is my neutral and which is my true hot wire to connect with the Master?
3.) Does it matter which Linear switch I use in which box? My gut tells me to use the master WD500Z in Box #1, and the auxiliary WT00Z in Box #2.
4.) Does anything about my current wiring setup indicate that I simply won’t be able to install these Linear switches? I don’t want to burn another day if it just won’t work without additional wiring, but I don’t know enough to make that call just by looking at what wires I currently have.
Thank you for any help you can give! Happy to provide additional clarification. This community has been a tremendously helpful learning tool as I get up to speed.