It is best not to connect the zero line of the live wire separated from the distribution box to the downlight or fan. If the current is separated all the way to the air conditioner, it will lead to insufficient power or tripping of the air conditioner. In the same way, if the downlight is connected, the total power of the air conditioner will definitely lead to insufficient downlight current, so the solution is to connect the downlight after the lamp is turned off. If the fan is not connected, it must be connected separately from other outlets. Otherwise, we must ensure that the incoming and outgoing lines are doomed. !