How to install a smart switch with dual control switch

Methods/Steps

This is the type of dual-control switches that are commonly used in our current homes.

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The internal wiring diagram is usually like this, we can test with an electric pen to make sure the fire wire is coming in.

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When we remove a panel it looks like this, distinguishing the specific wiring for the next wiring.

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After all the removal of the line is basically this kind of, the shaded part of the line wrapped up without using, to find the other two lights of the line with sharp-nosed pliers screwed, and wrapped with electrical tape.

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We find a random smart single-fire two-way panel, the next step is to connect it to the original removed wiring.

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Connect the firewire to L and the other two to L1 and L2.

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