Take the white wire leading to the second box and mark its end black too. This is a completed circuit.

3 Way Switch Wiring Electrical 101
2 wire light switch. Place one probe of the tester on the. The electricity flows from the hot wire black through the 2 way switch shown in off position and then to the light and returns through the neutral wire white. Putting a rechargeable battery inside the switch to supply the power to the mcu or method 2. At the light it connects to the neutral terminal. Turn off the circuit breaker at the main panel that supplies power to the three wire cable intended for the. Single pole treatlife smart light switch neutral wire required 24ghz wi fi light switch works with alexa and google assistant schedule remote control single pole etl listed 2 pack 47 out of 5 stars 918.
The method 1 is relatively easy. Two wire cable runs from the combo to the light fixture and the switch output is connected to the black wire running to the fixture hot terminal. Strip 34 inches of insulation from. The brown wire is live also know as permanent live this brings the live supply to the switch. Connect the 2 ground wires with a fourth wire nut. The blue wire is known as the switched live and takes power to the light.
Lets assume the load you are controlling is a light. Test the wires to verify that no power exists using a voltage tester. A standard 2 wire lighting circuit is shown in figure 1. Switched live is only live when the switch is on this is where it gets its name from. The source neutral wire is spliced to the neutral on the receptacle half of the combo device and to the white cable wire running to the light. Tag or otherwise mark the circuit breaker to alert.
Connect the black wire coming from the lightbox with the black wire leading to the second switch by twisting their ends together and fastening with a third wire nut. Cut 4 inches of sheathing from the ends of all the cables with a utility knife. By wiring a 2 way switch the circuit below shows the basic concept of electricity flow to the load. Thinking out of the box to make mcu work with the 2 wire wiring system. 600 coupon applied at checkout save 600 with coupon. How to attach a two wire lighting fixture to a three wire supply step 1.
In order to design a smart switch to retrofit the existing 2 wire installation its either method 1. Smart light switch treatlife 24ghz smart switch wifi light switch single pole neutral wire required works with alexa and google assistant schedule remote control fccetl listed 4 pack 48 out of 5 stars 639. How to wire two switches to one light fixture step 1. Turn off the power to the light circuit at the main panel.