The new decoration has not yet moved in, and the switch that controls the living room light trips as

It's a line problem, this doesn't need to be analyzed, there is a problem with the square number of lines in the living room, that is to say, the power consumption in your living room exceeds the line tolerance range, or the wire quality problem is overheated, the resistance is too large, and the strong electric box protects itself, so it will trip.

A simple solution may be able to solve it temporarily, you put this switch on the control light in the control box, and the zero line of fire is turned left and right, if it can be solved, it is the best. Detect whether it is a dual-control problem is also simple, you take the original switch in the living room (not the newly changed dual-control one) apart, only borrow the wire from the roof should be a red line and a yellow wire respectively connected to the upper node and the middle node of the switch to remove the other wires, so that it becomes a single control switch again, so that you can use the elimination method to see if it is a problem with the dual control wiring. Got it.

It should be a problem with the lamp, you can remove it and take a look.

You should be tripping caused by wiring error, the stair light is a dual control, if so, as long as you don't connect the zero line to the switch, no matter how you connect it will not be short-circuited.

It's better to check the wiring of the switch, it shouldn't be a big problem.

You take the switch of the control light in the control box, you take the original switch in the living room (not the newly changed dual control one) apart, and only borrow the wire from the roof.

It should be a red line and a yellow line.

Separately connected. The upper and middle nodes of the switch.

Remove all the other threads.

This will change back to a single-control switch, in this case.

You can use the elimination method to see if it is a problem with dual control wiring, and the zero live line is poured left and right, and it is best if it can be solved.

The problem of detecting whether it is dual control is also simple, and a simple method may be able to solve it temporarily.