There are 3 wires from the electric meter to the home, red and blue flowers, you can use an air switch with leakage protection as the master control switch (A0), and there are three ordinary air switches to control the lights (A1), Air conditioner (A2), socket (A3). Viewed from the front, there are 2 wiring posts above A0, an N symbol is engraved on the right side, and two wiring posts are engraved on the lower side, and an N symbol is engraved on the right side; A1, A2, and A3 are the same, with the upper and lower sides respectively A terminal block.

Three wires are distinguished: the red live wire (L), the blue neutral wire (N), and the flower wire are ground wires (E/PE/G/GND), and the ground wires are usually yellow and green. When installing the indoor circuit, the switch should be installed on the front, the upper end is the incoming wire, the lower end is the outgoing wire, and the ground wire does not enter the switch.

Connect indoor line

1. Connect the zero line (blue) with the letter N marked below, and all the indoor zero lines are connected here.
2. Connect the live wire of the lighting wire (light) to A1 below.
3. Connect the live wire branch of the socket cable to A2 below.
4. Connect the live line branch of the air conditioning line to A3 below.

Connect to the household line

1. Connect the zero wire (blue) to the upper N
2. Connect the live wire to the upper L (red)

Note: The ground wire does not need to enter the switch.