220V household electricity meter connection, how to connect the best diagram, thank you!

1 and the installation of three-phase watt-hour meter have two wiring modes. One is to connect an electric meter with a circuit transformer. The other is directly connected to the electricity meter.

2. The following is a description of direct contact. First, buy a direct-connected instrument. For example, today's electronic watches.

3. Install screws on the wall or on the watt-hour meter. Open the electric meter wiring cover again. The installation wiring diagram is attached to the back of the universal cover plate. It's actually in the product description of the instrument.

4. As shown in the figure, 1, 4, and 7 are power supply incoming lines. There is no need to distinguish the three stages of ABC, but you must have three fire lines or three stage lines. This must be made clear before installation.

5. Then install the three-phase wire into the wiring hole. Make sure that the two screws are in good contact. This is an incoming call.

6. Then connect the lines. If the wire is copper, it must be twisted into a line, not a cross line.

7. Finally, connect the zero line to the zero line of the electric energy meter. The lines can be thinner.