For 2-way or multiway switching, we would ALWAYS recommend wiring as "1 way" and programming the other dimmers in different locations of the house to perform switching wirelessly - so no 3 core wiring needs to be attached between the dimmers.
The way our dimmers work is when channel 1 is connected to dimmable bulbs, the remaining channels will automatically get power with no wires attached. (channel 1 is labelled as PRIMARY/Dimmer 1 on the back of the dimmers)Or If you have a neutral wire then non of the channels need to be connected with a load and can be programmed via the app. When you add the new smart series dimmer to the app all the channels will appear.
This means where you currently have a 1 gang dimmer you can fit a 2 gang dimmer and use the 2nd channel as a 2-way wireless switch. Same applies to a 3 gang, if you have a 4 gang it will still fit in the same back box
The unwired channels on the dimmer will just go from RED to BLUE but not do anything until automated. The spare channels on all of our dimmers can then be programmed to be wireless 2way switches by using the two way switching automation.
We always recommend wiring as one way due to the fact that 1 wired dimmer minimum load is 10W, if you have another dimmer controlling the same light using 3 core then the minimum load will be increased to 20w.
So a 10w increase for every dimmer wired to the same light.If you wire it to only one channel and ask the other channels to be wireless 2way switches, your minimum wattage will always only be 10w so this will help when wanting to use lower wattage LED bulbs.
If you have neutral wires at your switching points then no dimmable loads need to be attached.The spare channels can be used for other applications rather than a 2way switch, you can use all the dimmer channels for things like:kill switches for some or all of your devices by creating IF DO automations, (one IF DO automaton for the ON press and another IF DO automation for the OFF press)Link spare dimmer channels to turn on and off lightwave plug sockets and relays by creating a Group automation for Switch
(select the dimmer channel and the sockets/relays you would like to be grouped and switched together)
In some cases you may need to physically wire the switches together if it is a 1gang dimmer in a 3 way set up with 2 other 1 gang dimmers and no neutral wire is available to power the 2nd and 3rd switch (no load).
If this is the case please follow the below instructions:
How do I fit a two-way switch?
Two-way wiring can look very complicated at first, however, as long as your lighting is working well on your manual switches, it should be simple to swap to Lightwave’s Smart series.
If you’re not comfortable doing this yourself then please consult a qualified electrician.
Before you start
Shut off the power to the lighting circuit. Unscrew the faceplate of the switch to remove it from the back box. Take photos of the existing wiring at the back of each switch as it can be very useful to refer to at a later stage. Try to capture which terminal goes with each wire.
Two-wire or three-wire system
It is important to understand what system you are working with and it’s not as difficult as it may sound. Look at the back of each switch: you should see wiring terminals labelled ‘L1, L2, and C’. If both switches have no more than one wire fitted in to each terminal then you have a three-wire system. If one of the switches has more than one wire in both the L1 and L2 terminals then you have a two-wire system. Once you have identified your system, please follow the steps in the section below that applies to your set up.
For both switches, move all wires fitted to the L1 to the L terminal on the Lightwave switch. Move all wires fitted to the L2 to the X terminal on the Lightwave switch. Wires in the C terminal are not required and can be safely terminated or removed altogether.
At the first switch, move all wires fitted to L1 to the L terminal on the Lightwave switch. Move all wires fitted to L2 to the X terminal on the Lightwave switch. Move all wires fitted to C to the L terminal on the Lightwave switch.
At the second switch move all wires fitted to L1 to the L terminal on the Lightwave switch. Move all wires fitted to L2 to the X terminal on the Lightwave switch. Move all wires fitted to C to the X terminal on the Lightwave switch.
What if I have more than two switches in the circuit?
This is typically known as intermediate switching. It’s largely the same as two-way switching, but there is a specialised switch in the middle and additional wiring. You can spot this switch by looking at the back of it - it will have two sets of L1 and L2 terminals.
To add a Lightwave dimmer to this set up, you still need to follow all the steps above, but when you come to this particular switch, you need to move one set of L1 and L2 wires to the L terminal on the Lightwave switch and then move the other L1 and L2 wires to the X terminal on the Lightwave switch.