Smart Switches / Capacitor
Where should the capacitor be installed for a no-neutral smart switch?
Short answer: Usually at the light side across the first lighting circuit, often L1, but always follow the exact product wiring diagram.
Explanation
For many no-neutral smart switches, the capacitor should be installed at the light side, not inside the wall switch box. It is commonly connected across the first lighting circuit, usually L1, according to the wiring diagram. However, wiring design can vary by model, so the correct position must follow the exact product manual. If you are unsure, ask a qualified electrician to install it.
Common mistakes
- Putting the capacitor inside the switch box
- connecting it to the wrong gang
- installing it without turning off power.
Troubleshooting / next steps
- Refer to the product wiring diagram and verify which gang is L1. Have an electrician install it safely.
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