How to Wire a 2-Way Light Switch
Quick Answer
Connect the live to COM, and the two switched lives to L1 and L2 on both switches.
How to troubleshoot How to Wire a 2-Way Light Switch
2-way switches control a light from two locations. This guide covers wiring a 2-way switch circuit.
Step-by-Step Fix
- Turn off power at the consumer unit and verify dead.
- Remove the existing switches and note the wiring.
- Identify the COM, L1, and L2 terminals on the new switches.
- Connect the live wire to COM on the first switch.
- Connect the two strapper wires to L1 and L2.
- At the second switch, connect the switched live to COM.
- Restore power and test from both locations.
Common Error Codes
| Code | Meaning | Resolution |
|---|---|---|
| Light only works from one switch | Incorrect wiring | Check L1 and L2 connections. |
| Circuit trips | Wiring error | Check for short circuits. |
Frequently Asked Questions
What is a 2-way switch?
A switch that controls a light from two locations.
Can I use a 2-way switch as a 1-way switch?
Yes, use COM and L1 only.