What is the reason why the lights of the electric pen are on when testing the live wire and the neut

In use of the test pen.

When testing the live line and the neutral line, the neon bubbles of the test pen are lit, what the hell does this mean?

Schematic diagram of the electric tester test.

When such a situation occurs, I can tell you for sure: this is because the zero line of a certain point in the line has a broken circuit or poor contact!

Because, under normal circumstances, the zero line is at zero potential drop!

Only when there is an abnormality in the zero line will something like this happen!

Therefore, when you encounter such a situation, you only need to find the zero line fault point in time, and you will definitely be able to fix the fault drop!

This is a short circuit, it is likely to be empty open leakage to protect bad, check the leakage of the leakage switch of the end of the fire zero line remove, and then close the switch with a pen to detect the leakage of the switch terminal, are bright can replace the leakage switch, if the phase (fire) is not lit, then check the line and load.

In this case, the neutral line is broken, from the broken place to the load, the zero line will be lit with an electric pen measurement, this is because the live wire has a voltage of 220 volts through the load to this section of the neutral line.

Use a pen to test that both the live wire and the neutral line are electrified, one is the zero line is broken (open circuit), and the other is caused by the serious imbalance of the three-phase load of the power grid.

Use a pen to test the live wire and the neutral line, and the electric pen is bright because the neutral line is short-circuited.

Normally, even if you test the live wire and the neutral line with a pen, the light of the pen is on, but the live wire will be brighter and the neutral line will be slightly darker. This is normal.

If the brightness of the live wire and the neutral wire are the same, it means that the neutral wire is not good at the distribution box, and there is equipment plugged into other sockets.

In general, it is caused by the disconnection of the neutral line of the connected electrical appliances.

There is a switch connected to the neutral wire, and once the neutral wire is disconnected, the live wire will reach your test pen through the electrical appliance.

There is a high possibility that the neutral line will break.

There are other appliances on the zero that are turned on.

If the zero line is broken, this phenomenon will occur.

Under normal circumstances, only the light is on when measuring the live line, and the zero line is not lit.

However, in many cases, the measurement results are not credible, because the sensitivity of the pen is too high, and the weak induced electricity will cause the light to turn on, causing false judgment.

Under normal circumstances, the electric test with a pen should be the live wire light on, the zero line is not on, if the live wire and the zero line are on, then it means that the zero line is broken. Under normal circumstances, the electric test with a pen should be the live wire light on, the zero line is not on, if the live wire and the zero line are on, then it means that the zero line is broken. Under normal circumstances, the electric test with a pen should be the live wire light on, the zero line is not on, if the live wire and the zero line are on, then it means that the zero line is broken.

Under normal circumstances, the electric test with a pen should be the live wire light on, the zero line is not on, if the live wire and the zero line are on, then it means that the zero line is broken.

The electric pen measures the wire is the fire line light on.

It should be that there is no grounding wire for household electricity.

for the sake of it. The zero line of the live wire is electrified, and the light can still be on normally, indicating that there is no short circuit and the wiring is normal, then it can only be said that there is no ground wire, if the ground wire is connected, the voltage on the zero line will be imported into the ground wire, so that it is not electrified, of course, it may also be the electric box.

The ground wire between the electric box and the electrical box is not connected, resulting in the pressure difference between the two electrical boxes.

This is due to irregular wiring (non-compliance) in the home.

The most common is to install the switch on the neutral line of the electrical appliance, see figure:

This is because the electric pen is too sensitive to react, and the zero line is charged when measured with an electric pen, which is induced electricity, and the resistivity of the zero line is large, and the induction electricity is generated.

The electric pen measures that the zero line of the live wire is lit, why can the lamp still work normally? So that's what happened.

The potential on the zero line is not zero, it is not approximately grounded.

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.

When measuring the fire line with an electric pen, the electric pen is bright and the zero line is not lit, but the electric light is not lit, and the reason is that the lighting is broken.

In the case of the neutral line, this is because the potential of the human body is equal to the neutral wire, which is not enough for the current to flow through the bulb and shine.

For the live wire, because its potential is higher than the potential of the human body, there is a potential difference (voltage) between the two ends of the pen bulb, so the light is on.

The structure and principle of the voltage tester are: (live wire) - metal front end - bulb - large value resistance - metal back end - (contact with the human body) to form a series circuit. That is, a voltage of 220 volts is formed between the live wire and the human body, and part of it acts on the light bulb to make it glow.

When measuring the live line with an electric pen, when measuring the zero line with an electric pen, the electric pen does not light up, first check whether the voltage between the zero line live wire is enough to 220 volts, and then check whether the lamp head line is loose.

Hello, it is a pleasure to serve you. The specific answer to the question you asked is as follows: there are two possibilities in this situation, the first possibility is that the live wire and the neutral line are reversed, the neutral line is used as the live wire, and the live wire is used as the neutral line.

The second possibility, the zero line is broken, which is equivalent to a fault in the storage of ** circuit. In the first case, you need to go to the distribution cabinet to check the situation, and in the second case, you need to check the line fault and may need to be repaired slowly. Friend, if it helps you, please give a thumbs up, thank you.

Question: Does the mobile phone charger blow up, does it have anything to do with this?

Matter. There should be interphase electricity.

Question: I tested the socket with an electric pen, and the zero line was on, but the live wire was not on, so as soon as the phone was charged, the charger blew up, and the home also tripped.

There is a short circuit, in which case you may need to find an electrician to help you repair it.

Quickly pull all the electrical appliances, and then push the electricity again to see if you can push it up.

Ask a good question. Asking questions can be pushed up, and the air conditioner can be operated.

It's better not to run, in case the air conditioner burns out, it will be more than worth the loss.

Ask if it is normal for the electric pen to test the socket with a yellow grounding wire.

Abnormal. It means that the three threads are close together.

When measuring the fire line with a pen, the electric pen is on but the electric light is not on, indicating that the power supply line itself should be fine, but the circuit does not form a circulation loop, indicating that there is a problem with the electric lamp itself or the access circuit of the electric lamp has an open circuit or poor contact.

When measuring the fire line with an electric pen, the electric pen is on, and the zero line is not lit but the electric light is not on.

A: The light is broken.

The switch or light bulb is malfunctioning.

In short, the lamp circuit does not form a loop. As for whether the lamp is broken or the connection line of the lamp is broken (including the switch is broken), it needs to be measured.

The reason why the power supply line is normal and the light does not light up is that the connection line of the lamp head is broken and the bulb (including the LED light used now) is damaged.

It is necessary to check whether there is a problem with the light switch and the lamp base, if there is power in the live wire, it is normal for the neutral wire to have no power, so it needs to be checked one by one.

In this case, it should be caused by a circuit failure. That is, there is a break point in the line.

If it is measured from the lamp port, it is likely that the bulb is broken.

Try to change the lamp, if it is still like this, use a multimeter to measure whether the voltage is normal, which cannot be solved by an electric pen.

The neutral line has a break point or needs to be connected.

The light bulb does not light up, but why is it that when I test it with an electric tester, both the live wire and the neutral wire are electrified?

This is because: the tester is lit....

1. In the circuit of the light bulb circuit, the zero line has poor contact, or the zero line is simply broken!

2. The place where the zero line is broken may be at the lamp port or inside the bulb!

In a word: the zero line is broken, and it needs to be checked carefully!

Be sure to pay attention to safety when inspecting and repairing!

The switch of the lamp is installed on the neutral line or the neutral wire is broken, and the neutral wire passes through the bulb and is the same as the live wire, so the neutral live wire is electrified.

Use a voltage tester to measure the zero line of the power supply, which is a typical performance of the zero line break, if all the electrical appliances under a switch are out of power, the broken or loose zero line may be in the position of the switch into the home. This problem occurs in a certain electrical appliance, the disconnection position is generally at the end of the lead access point of the electrical appliance, if the end is well connected, the other upper electrical appliances are normal, the disconnection is during the period of this wire, which needs to be carefully checked.

Why does the light bulb not light up why the electric detector tests zero and the live wire are electrified, which shows that the live wire has passed the bulb, and the bulb has no problem, but the electricity of the live wire has not formed a loop, according to this loop, that is, follow the zero line to find the cause of the fault: The zero line is broken and virtually connected, which is a common fault. Before these two lines of the bulb, there are extra-high-power appliances working.

There is a short circuit before these two lines of the bulb. Overall, this is common and rarely occurs when the grid has a stable and sufficient power supply. It is also possible and cannot be ignored.

Caused by the disconnection of the neutral line of the entrance line.

Analysis: When the zero line of the entrance line is broken, the fire and zero line of the indoor circuit are electrified (the electric detector is glowing), but the electrical appliances do not work.

Turn on the bulb switch, the bulb is not lit, and the electric detector has electricity on both the zero line and the live wire. When the electric detector measures the zero line of live wire, it is the zero line break, and the inspection is checked from the main gate of the entrance line and the opening sequence until the line is broken.

If the bulb is not lit, it means that there is no current flowing in the bulb, or the power line is disconnected, and the electric detector measures that the zero live wire is electrified, which means that the zero line is disconnected, and the live wire extends to the disconnected zero line through the bulb, so you use the electric test to measure the zero live wire is live, and it is good to connect the disconnected zero wire.

Reason: 1. The bulb is broken, and the positive and negative poles are bright. The negative electrode is the induction electricity from other electrical appliances.

2. One of the wires is broken, but the bulb is good, the positive and negative poles are bright, and the electricity is through the filament of the bulb, so that the positive and negative poles are electrified.

The bulb is not lit, and the zero line is still powered when measured with a voltage tester, indicating that there is a problem with the wiring of the zero line, which is not connected well or is virtually connected.

Indicates that the zero line in the loop is broken somewhere. It is recommended to find an electrician to help you fix it, don't mess around if you don't understand! It's dangerous!

The neutral line is short-cut and does not form a loop, so there will be electricity in the measurement neutral line.

It means that the zero line is broken.

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.