Fit a Shelly 1 Mini behind a two-way switch
In a two-way circuit with a junction box, the Shelly is quick to fit: it sits in the junction box, where live, neutral and the switched wire to the lamp meet.
Two-way with junction box → Shelly behind the switches (with N) 3 steps in 1 box
Work out the plan for your boxes ▶
Different cables, swapped colours, more switches? The calculator takes over this setup and you adjust it.
⚡ Work on fixed electrical installations belongs in the hands of a qualified electrician. Take the plan to yours. Safety notes
More about this change
The switched wire from the switches goes to the Shelly’s SW input, its output O to the lamp. The switches stay as they are and keep working.
What to watch out for
- Set the input to “Edge” in the Shelly app, so each switch toggles the lamp whatever the position of the other one.
- If the Shelly doesn’t fit in the junction box, a deep switch box works too. The calculator works this out for your boxes.
What you need
- 1× Shelly 1 Mini Gen3
- 2× Wago 221-413 (3-way)