I am in the process of replacing my hallway 4-way switch with GE Z-Wave switches. I have discovered that one of the boxes (seem to be the last in the line) does not have a neutral wire. Here is what I have
Box A - primary - has four wires (two blacks, one red, one white) plus ground. I installed the primary switch there. The blue LED lit up.
Box B - middle - has two red wires, two black wires, one white, and ground. I installed an add-on switch there.
Box C - end - has one red, two blacks, and ground. I have not uninstalled the original switch yet as I am stumped.
Right now the light does not work. My questions are
As a temporary measure, I want to change the setup to a three-way with just Box A and B. Can I just uninstall the original switch on Box C, tie the two blacks together, install the add-on switch with no neutral, cap the red wire in Box B that connects B to C. This is to just make the light works while waiting to fish a neutral wire.
There is an outlet on the other side of the wall of Box C. However, the outlet belongs to a different circuit on the breaker box. Can I use the neutral from the outlet to wire Box C? I will hire an electrician to do the wiring/fishing.