How to divide the left and right sides of the bed

through the middle, not the zero line; The relative average voltage of the neutral line and the live wire is 220V, the ideal state is that the neutral line voltage is 0V, and the live wire voltage is 220V.

To distinguish between the live line and the neutral line, use a voltage tester.

Use of Voltage Tester:

There are two types of voltage testers, one is a fountain pen type and the other is a screwdriver type.

The usage of the two types of voltage testers is the same, and the way to hold it depends on their own habits, but there must be a finger in contact with the metal piece at the tail of the voltage tester, so that a closed circuit will be formed, so that the neon tube will glow, but the current is very small, because there is a large resistance in the voltage tester, which will not be harmful to people.

If you operate as described above, the neon tube glows, indicating that the voltage tester is in contact with the live wire, if it does not emit light, it is the neutral line or ground wire, but the premise is that the voltage tester is a usable one, if the neon tube is broken, the contact with the live wire does not glow.

or according to the color of the line; In general, the line of fire is red.

In addition, when wiring, be sure to disconnect all the main switches first! Don't forget!