The voltage tester is used to distinguish between the live wire and the neutral line

Whether the neon tube in the meter shines or not is the main basis for judging the live wire and the zero line, the light is the live line, and the light is the zero line, but the hand must touch the metal body at the end of the pen, so that it can be connected with the earth to form a path, so that the current can pass, and the neon tube can be luminous

Answer: Solution: The function of the meter is to distinguish between the live wire and the neutral line, but it is required to be used in accordance with the specification, otherwise the neon tube will not shine When using the electric tester to distinguish the live wire and the neutral line, contact the metal body at the end of the pen with your hand, and the nib touches the wire, and the neon tube emits light, indicating that the detected live wire, if the neon tube does not emit light, it means that the zero line in contact is in contact.

The voltage tester is used to measure whether the line is live, not used to measure the zero live line, usually the 220V power supply for household use, the neutral point of the power supply transformer.

They are all grounded, and the zero line and live wire can be judged with a voltage tester, and some special power grids cannot be judged by a voltage tester, and the zero live line cannot be judged with a voltage tester when there is no electricity.

The voltage tester is used to test whether there is electricity or not, not to distinguish the zero line of the live wire, which is the live line and the other is the zero line, and after measurement, judge according to the results.

The voltage tester can only refer to distinguish the live wire and the neutral line, which is not real! For example, the neutral line is broken (cut off by a switch), the pen is sometimes on (the phase wire flows out of the other wire through the unopened device), and sometimes it is not lit but does not light the bulb. You can only refer to it, you can only refer to it, and it is not practical to repair equipment tools!

The voltage tester is mainly used to distinguish between the live wire and the neutral line.

When the electric pen is tested, the wire that is bright is the fire wire!

Test pen test chart.

Zero line, ** road is completely normal, when tested with a test pen, the neon bubble will not light up! Only when the zero line is broken, the neon bubble will be lit when the test pen is tested!

The electric pen tests the bright line, ** the road is normal in the case of the live wire (phase wire). In the neutral grounding system of the transformer, because the neutral line (neutral wire) is the same or close to the ground potential, the neon bubble will not light up when the neon tube electric pen is tested; However, in abnormal cases, such as when the neutral wire is disconnected, the test of a certain section of the neutral wire and the electric pen may also be lit (after the load, the electricity returned from the phase wire, etc.), so it is necessary to pay attention to distinguish.

The line that lights on the pen test light is the fire line, and the zero line is the section between yourself and the earth.

What can make the electric pen light is the live wire, and the one that is not bright is the zero line.

The line that lights up in the pen test is the live line instead of the zero line, and if the zero line is broken, the test will also light up with the electric pen.

Of course, the electric pen measurement will be bright is the live wire, the potential of the zero line is 0, the electric pen measurement is not reacting, and the electric pen measurement will also be slightly bright when the zero line is poorly grounded.

The electric pen passes through the bulb and the human body inside, and forms a circuit with the earth, at this time the bulb inside will be on, indicating that the wire is charged and judged to be the live wire, but if the zero line is broken in, the live wire will also be charged through the load to the zero line, so it is only suitable for judging whether it is live, and cannot correctly judge whether it is a live wire or a zero line.

The electric pen must be lit by the fire wire, and there is no electricity below zero, so it will not light up.

The electric pen test is lit up by the live wire. But sometimes both are bright, and then there is a fault, and the zero line is connected to the wrong one. aqui te amo。

The line that lights up in the pen test is the live wire, and the line that does not light up is the neutral line or ground wire.

The test is on the fire line.

The principle of distinguishing between the live wire and the neutral line is to measure the voltage of the live wire of the neutral line with the "ground" as the reference. The zero line here is actually also the "ground" line, and its quoted ground has the same potential as the earth in nature. Based on the power safety use specification, the zero line is centrally grounded management.

With the development of electric power science and technology, people's use and cognitive ability of electricity.

It's getting more and more profound. The voltage tester products have developed from the original neon bubble products to digital display electronic products, and now the non-contact inductive voltage tester is used and is deeply loved by the majority of electrician enthusiasts.

It is a zero-fire line identification and leakage measurement, which can be used for tools.

Hello, glad to answer for you. The wire that lights up for the pen test is the live wire, first of all, we put the pen on top of the wire, and it is best for us to bring an insulating glove when using it, just in case. Put the electric pen on the wire, if the indicator light is not on, or there is a faint light, it means that this is the neutral line, because the voltage of the neutral line is very low.

When we put the electric pen on the wire, the indicator light will be on, which means that this wire is the live wire, because the live wire itself has voltage, so the indicator light will be on when we test it with the electric tester.

Zero line. The two cuts of the socket are bright when measuring with an electric pen, which is caused by the fuse blowing of the neutral wire or the defective skewers of the fuse seat, and the live wire is formed by the electrical appliances on the drag line board.

At this time, the electric pen should be used to test the safety seat of the zero line, and if the electric pen is not lit, the drag line board is broken; If the electric pen is on, the upper end of the fuse seat of the zero line should be tested, and if the electric pen is not lit, the fuse is blown or the fuse seat is poor; The electric pen is bright is the broken line from the zero line of the meter to the safety seat.

The circuit used to be normal, but now it is not normal, the socket does not work, and the light does not turn on. Measure the metal pieces in the two holes of the socket with a voltage tester, and both show red. Your conclusion: it's all in the line of fire. Is that the case?

This is because of the "zero line open circuit", which is often referred to as the "missing zero line". Because you connected the neutral wire to the ground terminal of the home line! That is to say, the back of the meter is connected to the wrong one! If you know which terminal is the neutral terminal, change it. It's best to find an electrician to pick it up.

It can be seen from the figure that the electrical appliances are skewed on the towing board, and the two cuts holes of the socket are bright when measuring the socket with an electric pen, which is caused by the fuse blowing of the zero line or the defective skewers of the fuse seat, and the live wire is formed by the electrical appliances on the towing board.

At this time, the electric pen should be used to test the safety seat of the zero line (the wiring place of the towing board), and if the electric pen does not light up, the towing board is broken; If the electric pen is on, the upper end of the fuse seat of the zero line should be tested, and if the electric pen is not lit, the fuse is blown or the fuse seat is poor; The electric pen is bright is the broken line from the zero line of the meter to the safety seat.

There is electricity in the live wire. The neutral wire is grounded. When the human model reaches the line of fire, it will be numb, because it forms a closed loop with the earth!

The home circuits are in parallel! Go through the meter first! Look at it for yourself!

I suggest you still find a professional handle! Safety first! Ask for points.

It should be caused by the disconnection of the zero line, see that you plug in other electrical appliances on the socket, the live wire forms a circuit through the electrical appliances, so it causes the 2 wires to be bright, it is recommended to disconnect all the electrical appliances and then test, distinguish which live wire and check whether the other one is broken.

The line that the pen test lights up is the live wire, and the fuse is connected to the live wire, the plug bar, one wire is connected to the live wire, and the other end is connected to the zero line out of the meter.

1. When the switch controls the open state of the zero line, the live wire returns to the zero line through the load, and the zero line live wire has electricity, and it will have the same brightness when measured with an electric pen.

2. When the switch is open, if the wire is aged, through the greasy and humid lot, etc., the zero line will have induction electricity, measured with a pen, the zero line will be bright, but obviously not as bright as the live wire.

3. The line with a long installation time will inevitably have weak links such as aging, humidity and damage, and the zero line will have induction electricity, and the amount of electric pen will be bright, but there must be no spark.

The diodes connected in parallel on the relay play a protective role to prevent the transistor from being damaged by the high voltage generated by the self-induction when the relay is de-energized and released.

The live line will light up, the zero line will not.

In order to distinguish between the live wire and the neutral line, many friends will choose to use the voltage tester to test, but many friends do not know much about the operation steps of using the voltage tester to distinguish the live wire and the zero line, so how to use the voltage tester to distinguish the live wire and the zero line? Let's learn together.

1. If you want to use the voltage tester to distinguish the live wire and the neutral line, then you should first test the voltage tester in detail whether there is a safety resistance, and then you should also check in detail whether the voltage tester is damaged, whether there is moisture, whether there is water and other problems, and after confirming that the test pen is not a problem, you can use the voltage tester to distinguish the live wire and the zero line.

2. When using the voltage tester to distinguish the live wire and the neutral line, you must not directly touch the metal probe at the front end of the voltage tester with your hands, once the person accidentally touches the metal probe at the front end of the voltage tester, people will have an electric shock accident.

3. When using the voltage tester to distinguish the live wire and the neutral line, you must touch the metal part at the end of the voltage tester with your hand. If people do not touch the metal part of the tail end of the electric tester with their hands, the circuit between the charged body, the electric tester, the person and the earth cannot be formed, and the neon bubble in the electric tester will not appear to glow, which will lead to the wrong judgment of people, thinking that the charged body is not electrified, but the charged body is actually electrified, which may bring electric shock hazards to people.

4. Before distinguishing between the live wire and the neutral line, you should first find a known power supply for testing to see if the neon bubble of the voltage tester can emit normally, if it cannot emit normally, then you should replace it with a new voltage tester for testing, only when the neon bubble is normal to emit light, you can use the voltage tester to distinguish the live wire and the neutral line.

5. If you want to use the voltage tester to distinguish between the live line and the neutral line, then you should check in detail whether the neon bubble of the voltage tester will glow. If the neon bubble of the tester will emit light, then it means that it is a live line, and if the neon bubble of the tester will not emit light, then it means that it is a zero line.

6. Because the live wire itself will have its own voltage, when the voltage tester touches the live wire, the neon bubble of the voltage tester will glow, and the current will generally pass through the voltage tester first, then pass through the tester, and then lead to the earth. When the voltage tester touches the neutral line, the neon bubble of the voltage tester will not glow, because the neutral line is usually directly connected to the earth.

The above is a detailed introduction to how the voltage tester is used to distinguish between the live wire and the neutral line, I hope it can help those who need to distinguish the live wire and the neutral line. When using the voltage tester to distinguish between the live wire and the neutral line, you must not directly touch the metal probe at the front end of the voltage tester with your hands, otherwise it is easy to have an electric shock accident.