I'd like to install a Jasco Z-Wave switch (45709) and its add-on switch (45710) in this newish (2004) house, but the wiring instructions do not correspond to what I have behind the current (mechanical) switches. It currently appears to be wired the same as this diagram:
The colors match, and I've confirmed the black wire on the left hand switch is hot regardless of switch position.
Some of the connections are obvious:
- the traveler wire just goes from switch to switch
- the black on the left switch is line (but not needed; see below)
- on the right switch line can be tapped from the wire nut
- the black going to common on the right switch is the load
But that still leaves the question of where the neutral connection comes from in each switch. To be clear, the 45709 expects line, neutral, load and traveler, and the 45710 expects neutral and traveler. (Wait, what? It doesn't need line. I guess the traveler wire carries DC power as well as signalling.)