Как разделить провод в нейтраль провод и прямой ток провод с электричество ручка и мультиметр
It is the simplest test method to distinct the live wire and the neutral wire with an electroscope pen, just observe the indicator light;
Use an обычный электроскоп pen, that is, the one with an indicator light. When using it, you must follow the instructions, pay attention to safety, and the wiring must be handled properly, and blind operation is not allowed;
After the two wires are energized, touch the core of the wire with an electric pen, the one with the indicator light on is the live wire, and the one with the indicator light off is the neutral wire.
Использование a мультиметр к различать под напряжением провода и нейтраль провода is a little more хлопотно чем использование an электроскоп перо. До тестирование, do the follow work;
Before use, insert the line pen with the black meter into the COM end, which is the common port hole, and connect the red meter pen to the VO, which is the test port hole;
Then adjust the gear of the multimeter to the gear of about 750V, complete the above steps to prepare for the test;
Be sure to handle the wire ends before testing, and then turn on the power. During the test, one hand holds the red test lead to touch the core, and the other hand holds the black test lead to touch the ground or the wall. The multimeter показывает that the voltage is about 220V. Fire wire, the display value is close to 0 is the zero line% 3б
Через the above steps, we can easy distinct which is the live wire and which is the neutral wire.
How to measure the fire wire in the line with a digital multimeter
First, turn the digital multimeter to the AC ~ 750V gear, use the red test lead line or the black test lead line of the multimeter, wrap it around your hand for 3~5 times, and insert the other test lead into or contact the metal pile head of the conductor or socket.
This is the principle that the contact between the wire and the human body will form a distributed capacitance (the more the number of wire turns, the greater the capacitance formed with the human body), and the sensitivity of the digital multimeter myself is higher than that of the pointer multimeter. So the response to the display value of the digital multimeter is larger.
The above is a commonly used measurement method, usually wrapped around the hand 4 times, the measured result at this time is ~57V, there is no doubt that it is the live wire. The test lead line wound on the hand does not move, and then use the black test lead to touch the other ground wire N and PE protection ground соответственно.
At this time, the measurement result of the digital multimeter is displayed as 000, which means that the live wire, neutral wire, and PE protective grounding in the line have all been detected.
Set the digital multimeter to the AC 700v range. If you don't know the voltage, you should switch to high-end. Use the red test pen to test one, and the black test pen to test the other two. If one is 220v and the other is ov or very low, then the red test pen The live wire is connected, and the voltage connected to the black test lead is ноль или экстремально низкий, который есть заземление провод. The напряжение подключенный к внутренний перо is 220v, который is the neutral line.
