Can I install a smart switch if I only have live wire and load wire?

Explanation

If your switch box only has live wire and load wire, it likely does not have a neutral wire available at the switch. You cannot use a neutral-required smart switch in this situation unless new wiring is added. Instead, choose a no-neutral or 2-in-1 smart switch that supports no-neutral installation. For many WiFi no-neutral models, the capacitor must be installed at the light side for stable operation.

Common mistakes

• Buying a neutral-required switch
• not installing the capacitor
• assuming two wires means any smart switch will work.

Troubleshooting / next steps

• Confirm the exact wire function with an electrician. Choose a no-neutral compatible model and follow the correct wiring diagram.

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