How to use the live wire identification function of the multimeter
Electricians used to use electric pens for maintenance and troubleshooting, but now they use multimeters. In fact, not only the electric pen can distinguish the live wire from the neutral wire, but the multimeter can also distinguish the live wire from the neutral wire, but many people don’t know it.
The method of distinguishing live wire and zero wire by electric pen
Ordinary electric pen: For electrician maintenance and troubleshooting in the past, a single electric pen was used all over the world. The ordinary electric pen distinguishes the live wire and the neutral wire. The live wire, the electric pen does not light up, it is the neutral wire
Digital electric pen: Since the digital electric pen is available, it is rarely used for ordinary electric pens. For digital electric pens, it has more functions, such as checking broken wires without electricity, distinguishing neutral wires and live wires, distinguishing the positive and negative poles of DC batteries, and judging whether the wires are short-circuited. It’s all right, so the ordinary electric pen is gradually eliminated. If you use a digital electric pen to distinguish the live wire and the neutral wire, you can directly use the electric pen to measure the live wire and the neutral wire, and observe the voltage of the digital electric pen. If the maximum voltage displayed is 220V, it proves that it is the live wire. If the maximum voltage displayed is 12V or 36V, it proves to be the neutral line
Inductive breakpoint measuring pen: the main function of the breakpoint pen is to find the position of the breakpoint inside the line after the wire is not energized. When the electric pen measures the live wire, the sound is relatively rapid, and when the neutral wire is measured, the sound is relatively slow.
