The use of multimeter in family life
For families, there is a multimeter. When the home circuit fails, measure the voltage, measure the on-off, and measure the resistance to ground, which can basically handle the home circuit failure.
With a multimeter at home, there is almost no need to be afraid of problems with the home circuit. After all, the home circuit is simple, at least you don’t need to be afraid of accidentally touching live objects. But if you don't have a multimeter at home, that's fine. Because the home circuit is simple, basically there are very few problems.
