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Old 10-31-2016, 03:07 PM   #1
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3 way switch with z wave micro switch help


I am trying to install a Aeon Labs DSC18103-ZWUS micro switch with an existing 3 way switch. The 3 way switch I am looking at has 2 black and 1 red wire (see pic) with neutral wires capped in the box. Any help would be much appreciated.
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Old 10-31-2016, 11:32 PM   #2
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Re: 3 way switch with z wave micro switch help


I'm not sure what you're trying to do? Are you trying to use the 2 x 3-way switches together with the dsc?

Essentially, the 3 way switches will have to be disconnected from power from where they are now. The "common" terminal of each will run back to the dsc. Both wires go to the "signal wire" terminals. One wire to each. Do not use the 3v terminal. Polarity doesn't matter.

Right now, one is powered from line, and one is going to your load. (a light?) This will require some re-routing. You'll have to find a nice place for that box too, because, I don't think you'll be able to fit it in that box with all those wires.

When you disconnect your switches. Line (L1) goes straight to the dsc (L terminal). The wire going to your load will land on the L-load terminal. Uncap the neutral and it goes to the N terminal.

Cheers!
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Old 11-01-2016, 04:53 PM   #3
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Re: 3 way switch with z wave micro switch help


You should note that this device must have an uninterrupted current supply. Therefore it must placed in the circuit before the switches, electrically speaking.

There is five ways a set of 3-way switches can be wired. Whether or not you can used this device and where you would use it, depends on how the switches are wired.

The first way of wiring 3-way switches is;
Power is taken to the first switch box. A 3-wire cable is run to the second switch box. A 2-wire cable is run from the first switch box to the ceiling fixture box.
In the first switch box the incoming neutral is connected to the neutral going to the ceiling fixture. The incoming hot is connected to the common of the switch. Power passes through the switch to the traveler wires going second switch. Current passes through the second switch and comes out the common. The common wire returns it to the first switch box. The common wire from the second switch is connected to the black of the 2-wire cable going to the ceiling fixture.

If you have this type of wiring you can use the device in the first switch box.

The second way of wiring a set of 3-way switches;

Power is brought to the first switch box. A 3-wire cable is run to the second switch box. A 2-wire cable is run from the second switch box to the ceiling fixture box.
In the first switch box the incoming neutral is connected to the neutral of the 3-wire cable to the second switch box. Incoming power is connected to the common of the switch. Power passes through the switch to the travelers wires to the second switch. At the second switch the neutral of the 3-wire cable is connected to the neutral going to the ceiling fixture. The travelers wires are connected to the traveler terminals of the second switch. Power passes through the switch and comes out the common terminal, which has the black of the 2-wire cable to the ceiling attached.

If you have this type of wiring you cannot use the device

The third way of wiring 3-way switches is;

Power is brought to the first switch box. A 3-wire cable is run from the first switch to the ceiling box. A 3-wire cable is run from the ceiling box to the second 3-way switch box.
The incoming neutral is connected to the neutral of the 3-wire cable going to the ceiling box. The incoming hot is connected to the common terminal of the switch. Power is passed through the switch to the traveler screws and to the traveler wires of the 3-wire cable going to the ceiling box. At the ceiling box the traveler wires from the first switch are connected to the traveler wires of the cable going to the second switch box. At the second switch box the traveler wires are connected to the traveler terminals. Power passes through the switch and comes out the common terminal and goes back to the ceiling fixture on the common wire of the 3-wire cable between the ceiling and the second switch box.

If you have this type of wiring you cannot use the device.

The fourth way of wiring 3-way switches is;

Power is brought to the ceiling box. A 2-wire cable is run from the ceiling box to the first switch box. A 3-wire cable is run from the first switch box to the second switch box.
At the ceiling box the incoming neutral is connected to the light fixture. The incoming hot is connected to one of the wires of the 2-wire cable going to the first switch box. Usually the white wire is used for this. Power passes from the ceiling to first switch common terminal. Power passes through the switch to the traveler screws and wires to the second switch. At the second switch power passes through the switch to the common terminal. The common wire of the 3-wire cable between the two switches is connected to the common terminal and returns power to the first switch box. There the common wire is connected to the black wire of the 2-wire cable going to the ceiling box which returns power to the ceiling fixture.

If you have this type of wiring you can use the device but it must be located in the ceiling box.

The fifth way of wiring 3-way switches is;

Power is brought to the ceiling box. A 3-wire cable is run from the ceiling box to the first switch box. A 3-wire cable is run from the ceiling box to the second switch box.

The incoming neutral is connected to the fixture. The incoming hot is connected to one of the wires of the 3-wire cable going to the first switch. At the switch that wire is connected to the common terminal. The other two wires are connected to the traveler terminals. At the ceiling box those traveler wires are connected to the traveler wires of the 3-wire cable going to the second switch. At the second switch the traveler wires are connected to the traveler terminals. The third wire in that 3-wire cable is connected to the common terminal and returns power to the ceiling fixture.
If you have this type of wiring you can use the device but it must be located in the ceiling box.

Last edited by hkstroud; 11-01-2016 at 05:06 PM.
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Old 11-01-2016, 05:51 PM   #4
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Re: 3 way switch with z wave micro switch help


Way easier to get a zwave lutron with a remote. Wall mount the remote. Forget about the 3 way wiring all together. Bob's you're uncle, so to speak. There's more then one way to skin this cat.

PS. It's been posted about before, so there's some examples.

Cheers!
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