electricalhome-automationswitch
I am trying to replace a single switch connected to a single light bulb with a Z Wave enabled switch, model ZW4001Z; a link to the manual for the switch is at the bottom. There is a wiring diagram on the bottom of page 5 of the manual showing how you are supposed to wire the switch, the diagram uses 3 wires and a ground; the problem is that I only have 2 wires and a ground. How am I supposed to hook up the switch? My wiring looks like this:
Light 1. Yes, you will pigtail and put the 3 neutral wires together in 1 wire nut.
Light 2. Correct, it will not work. You will need to add the control at the junction box with the light or receptacle.
Light 3. I would put a pigtail in with the black wires, and put under the top screw. Add the pigtail and put the 3 neutrals together. The red wire to the bottom screw. Are the wires in conduit, or do they come from a cable? I would expect that the red is a 2nd hot wire, but that would lead one to expect a black wire to be somewhere close.
Light 4. Pigtail into neutrals for the switch. Another pigtail with the 2 upper black. And put the single black back in the lower terminal.
2 wires under 1 screw is a no-no, and using a screw and a push-in is just poor form.
Based on what you've shown, you should be able to wire it up like this...
However, those red Wing-Nut® twist-on wire connectors are only rated for a maximum of 6 #14 conductors. So you'll have to split up the neutrals in to two groups, and connect the groups with a pigtail between them.
Best Answer
If the picture included with your question is what your current setup looks like, you don't have the neutral (white) wire that the installation instructions are expecting.
EDIT - The more I think about it, you may need to have a neutral wire so you can get the "wireless" and any other "smarts" that are in the switch itself. The diagram above will work fine for a normal switch but you may have trouble with you fancy new one.