What are the causes of electrical box tripping?

There are only two possibilities: first, the fourth row of lights has leakage, and second, it is overload or short circuit;

Troubleshooting: Turn on the fourth row of lights and any row of lights to see if it will jump. If it is normal, it proves that the switch is too small, and if it will jump, it proves that the fourth row of lights is short-circuited;

Turn on the fourth row of lights separately and see if the lights will jump back. If it still jumps, it means that the electrical appliance has leakage;

Use a special multimeter to measure the operation inspection. If you don't know anything, go to an electrician to check it out. The problem is not big.