How many wires does an electrician need to dim?

As shown in the figure, similar to lighting, the number of lamp holders to be connected depends on the power of the dimmer. Note: The phase line enters the dimmer.

The other is an electronic lighting separator for lighting distribution. Its principle is: when the switch is turned on for the first time, the light 1 lights up; Turn on the switch for the second time, and the No.2 light will be on; Turn on the switch for the third time, and the No.3 light will be on; When the switch was turned on for the fourth time, all the lights came on. Note: It is also the phase line incoming switch.