The electrician came in, my house went out of the kitchen, and the wires in the wire box were 4 squa

Yes. Copper wire can drive 8800 watts of electrical appliances at the same time, the joint sealed by cement is in good contact, as long as the entangled insulation is not destroyed, the joint is dry and not wet and rusty, it will not affect the normal use, you can shake the meter or multimeter to measure whether the insulation of the sealed wire is good. (It is generally recommended not to seal it for easy maintenance.) >>>More

As long as the interface is treated, there is no problem (the buried one should be waterproofed). >>>More

It's very simple, you are equipped with the kind of protector that only has leakage, this protection device is only useful for leakage, you accidentally broke the line when you burned the fire, but it was a short circuit, and or the two were not grounded and leaked, so they did not jump. It is recommended to install a gate knife or replace a 2-in-1 leakage protector that can start a short circuit, which is very cheap, about 20 yuan.

No problem, as long as the specifications of the live wire and the zero line are the same! Because the lines for each of your rooms are independent! If you change the fire-ground wire in the kitchen, it won't affect the other rooms! >>>More

It may be that the neutral line is broken, and it is recommended to test it with a calibration bulb to check the quality of the new bulb and the ballast part. Another concept is clarified: the switch is connected to the live wire, so there is no live wire at the switch, and there is only the incoming line and the outgoing line!