How to use a multimeter to check short circuit and leakage faults in the home
1. There is a phenomenon of "soft breakdown" in the "socket" circuit in your home. The method of judgment is to use a 500V megohmmeter to check the insulation between the "neutral line" and the "live line" after power failure, and the minimum insulation resistance should not be less than 0.5 megohms,
2. There is a slight leakage phenomenon in the "socket" circuit in your home. The inspection method is to remove the "neutral line" and "live line" of the "socket" circuit in your home, and then connect them to any other switch with the same capacity in the distribution box. If the switch no longer trips after closing, it means that there is a slight leakage phenomenon in the "socket" circuit in your home. If the switch still trips after closing, it means there is a "soft breakdown" phenomenon in the "socket" circuit of your home.
3. There is a problem with the leakage protection switch of the "socket" circuit in your home. You can try replacing it.
Finally, I have a piece of advice for you; Never listen to those who don't understand electrical engineering and blindly switch the capacity up, otherwise there is danger. 1. Are there any electrical appliances with high loads?
If not, then there must be something short circuited It's a problem with the wiring. There may be a short circuit in some part of your home. Please have an electrician check it at home. That means there's a short circuit somewhere!!! Check the switch carefully for any faults, short circuits, or electrical leakage. I'm not sure if you changed the wiring during the renovation. If the cables were laid without protective tubes, this problem may occur. There are two possibilities for this problem: overload of the load; There is a short circuit in the circuit I personally feel that the biggest possibility is that there is a problem with the leakage switch, because you mentioned that the main switch also tripped. The reason for the main switch tripping is due to excessive current. If it is an electrical leakage, I won't tell you for a few minutes before jumping. It should be in an instant, between 20ms-40ms. Try replacing the leakage switch, it may be due to poor insulation inside
