Lamp switch wiring method:
1. It is safe to have three wires, live wire, neutral wire and ground wire. The ground wire is usually yellow-green two-color wire; The test pen can be used to find the fire line, and remember the color of the fire line, it is best to mark;
2. One of the duplex wires must be directly connected to the middle terminal of the two dual-control switches; The intermediate connected electrical appliances and power supply can be switched in the open\/open state