How to Install My Tapo Smart 3-Way Dimmer Switches (Tapo S515D)

*Note: Before installing the S515D please remember that you will be working with your home’s electricity. This can be dangerous, so if you are not comfortable with basic electrical wiring, do not attempt to install it. Contact a licensed electrician for assistance.

1. Prepare the Necessary Tools

You might need a voltage detector, a Phillips-Head screwdriver, a flathead screwdriver, pliers, and wire nuts (included).

2. Turn Off the Power

Turn off the circuit breaker for your lights.

3. Remove Wall Plates

Remove the wall plates of your two existing switches and expose the wires. Use a voltage detector to confirm that all power is off for both wall boxes.

4. Take a Picture

Take a picture of the wiring in case you want to return to using the old switches.

5. Identify Traveler Wires

The two Traveler wires are opposite each other with the same color screws. The remaining wire is the Line/Load wire. The Line wire is also known as Live or Hot wire. Line and load wires are located separately in two wall boxes.

6. Label the Traveler Wires in the Two Wall Boxes

7. Label the Line and Load Wire Separately in the Two Wall Boxes

1) Only disconnect the Line and Load wires from the two old switches, then cover them with the provided wire nuts for safety.

2) Turn on the circuit breaker and use a voltage detector to identify the energized wire, which is the Line wire. This is the wall box in which the main switch will be installed.

Note: Take care to avoid electric shocks.

8. Label the Neutral Wire in the Wall Box Where the Line Wire Is Located

In the wall box where the Line wire is located, look for a bundle of white wires secured with a wire nut. They may be folded up in the very back. Apply the Neutral label to one of your neutral wires.

9. Label the Ground Wire in the Two Wall Boxes

Label the Ground wire of the two wall boxes, which is normally green or copper.

10. Connect the Wires to the New Switches

Disconnect all wires from the two old switches and, using labels, connect them to the new switches as depicted below.

11. Double-Check the Wires

Check that all the wires are correct. While holding the wire nut, give them a light tug to ensure they are secure.

Note: Incorrect wiring may damage the Tapo smart 3-way switches.

12. Install the New Switches

Gently fold all the wires back into the wall box and line up with the switch with the mounting holes. Secure it with screws. Repeat for both switches.

13. Turn On Power

Turn on the circuit breaker. Check your handiwork by turning your Smart Switches on and off a few times; your lights should turn on and off.

14. Attach the Wall Plates

Note:

If the main dimmer LED rapidly blinks red after installation, this means the wires are incorrectly connected. Please re-check the wiring. We recommend consulting an electrician.

To learn more about each function and configuration, please go to the Download Center to download your product's manual.