When my household appliances are not in use, there is electricity on the neutral live wire, is this

Not quite normal. When the light is not on, the zero line may have a loop, or it may be the zero line of the switch control, and you are measuring whether it is in front of the switch. There are many possibilities.

The switch is closed, there is electricity at one end and no power at the other end, it is normal Whether you switch on the neutral line or the live wire, there is a potential difference between the front and back ends of the lamp It is generally believed that the potential in front of the lamp is equal to the power supply voltage The potential behind the lamp is the zero line potential, and the ideal state is zero.

The home circuit is an AC circuit, when all the electrical appliances are turned off, the live wire is electrified, and it can be tested with a voltage tester; The zero line is not lit when tested with a test pen; If both wires are tested to be lit, it means that there is circuit leakage and needs to be checked and repaired.

Normal but not normal, this is because your switch controls the neutral line. Just swap the neutral and live wires at the power switch.

It may be that your switch is connected to the neutral wire, and when the light is not turned on, the lamp is live, so both the neutral wire and the live wire are electrified. But when you turn on the switch, the neutral wire should be dead.

There is electricity in both the live and neutral wires of the home circuit, however, so household appliances are not usable. This happens for the following reasons:

Home circuits. 1. The zero line in the home circuit has poor contact or open circuit fault!

2. Refer to the figure above, if there is really a fuse in the line, it may be that the fuse is in poor contact.

The way to inspect the repair is:

1. Use a multimeter to detect whether the power supply voltage at the upper port of the knife switch is normal?

2. Is the power supply voltage at the lower port of the fuse normal?

After such an inspection, you will definitely be able to find the problem!

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

The first reason: the neutral line is broken. For example, when we send electricity, turn on the light switch, if the light is not on, then we use a pen to measure the 2 binding posts of the lamp, if the live wire and the neutral wire are live, 100% of the neutral line is broken and the neutral line is live.

Solution: Check the position of the lower zero line connector, see if the lower connector is not connected well or whether it is missing, check the position of the lamp head, and see if the lower zero line falls off.

The second reason: switching the zero. For example, after we send electricity, turn on the light switch and the light can be turned on normally, and when the light switch is turned off, we use a pen to measure the 2 binding posts of the lamp.

Solution: normal control of the light, the switch to control the live wire, if the control of the zero line is not safe, in this case, we have to adjust the zero line and the live wire, the zero line to connect the light, the live line switch, or we can adjust the zero line of the live wire under the electric switch.

Hello, this is because the neutral line is broken, and under normal circumstances, the electricity on the live wire will reach the neutral line through the electrical appliances and form a loop. If the neutral line has zero potential, it can form a current, and the electrical appliance can work. If the zero line is not connected, it will become the same potential as the live wire, and the test with the electric tester will show that it is electrified, and at the same time, it cannot form a loop, so there will be no current, so the electrical appliance will not work.

You just ask the electrician to connect the neutral wire. I hope it can help you, I wish you all the best, and I look forward to your praise, thank you!

In this case, most of them are faults caused by disconnection of the neutral line. If you use a knife switch at home, you can directly check whether the neutral fuse of the knife switch is blown out; If it is an automatic switch, find the zero line broken line step by step, and deal with it.

There is electricity in the live wire (phase wire) and neutral wire (neutral wire) of the electrical circuit at home, but the electrical appliances cannot be used. This phenomenon is that the neutral line is not connected, and the electricity of the phase wire returns to the neutral line through the load; The electrical appliance cannot be used because the voltage applied to the appliance is 0 or very low, and the appliance cannot work properly.

The biggest possibility is that the zero line is broken, and if the zero line is broken, it will be connected to the live wire through the electrical appliances, resulting in the zero live wire being electrified.

In this case, the neutral line is usually broken.

Check whether the input terminal of the knife switch (main switch) is normal, and whether the output terminal is normal.

The zero line of the live wire has electricity, so of course it can't be used. Electricity needs to form a loop before it can be useful. If you have a multimeter, measure the zero live wire, there should be no voltage.

The neutral line is broken, when the live wire switch is turned on, the neutral line of the live wire has electricity, but the electrical appliances cannot be used.

In this case, there is a high probability that the zero line is broken. And based on what you've described, it seems that the neutral line is broken closer to the main switch.

Why is there electricity in the live wire of the electrical appliances at home and no power in the neutral wire! Can't use the dot pointer? ”

There are generally two types of situations where electrical appliances cannot afford electricity:

In the first case, if the electrical appliance is normal, it means that the appliance is broken, and you can ask a friend to help repair it, or take the appliance to the repair shop to repair it.

In the second case, it is generally a circuit failure, such as an open circuit of the zero line, and the electrical appliance cannot be used because the current cannot form a loop. This requires a little basic knowledge of electricians, with the help of a multimeter.

Careful inspection is usually due to the presence of false joints or oxidation disconnections on the joints of the neutral line.

If you don't have an electrician foundation, it is recommended to ask an electrician master to help, so that you can avoid detours, after all, no electricity will bring a lot of inconvenience to life.

If the live line is electrified, the zero line is not electrified, and the zero line is not electrified, and the electrical appliances cannot be used, then it is not normal, the problem is likely to be on the zero line, and the zero line has poor contact.

The live wire has electricity, and the neutral line has no power, and this is the case under normal circumstances. If the electrical appliances are not used, it is not normal. The problem is likely to be on the neutral line, which is typical of a broken neutral line. If you follow the wire to detect, there will be breakpoints, or strict contact with bad places for you.

I think that the electrical appliances in your home have no electricity, so you have to find an electrician to pay for the line that comes in from the outside meter to find the reason, so that the zero line of the fire wire can have electricity.

Please check if the neutral line is broken, and the device does not have various circuits. If you use leakage protection switches at home, the store can't deliver them.

Summary. When the neutral wire is electrified, it is generally the live wire that is grounded or touches a metal object. The electrical appliances cannot be used because the live wire is grounded and cannot be used with protection.

There is electricity on the zero line of the electrical circuit at home, but the electrical appliances cannot be used.

Hello, this is a short circuit, it may also be the live wire grounding, to cut off the power supply, find the switch box**short circuit,**live wire grounding.

When the neutral wire is electrified, it is generally the live wire that is grounded or touches a metal object. The electrical appliances cannot be used because the live wire is grounded and cannot be used with protection.

When did it start and how did it happen.

If there is only a live wire and no neutral wire, electricity cannot be used. This is because a closed loop needs to be formed in the circuit, including the power supply, load and wire, etc., and when any of these links are missing, a reliable closed loop cannot be formed.

If there is only a live wire and no zero mode and wire, it is recommended that you do not turn on the power supply at will. Here are a few ways you can consider:

1.Find a professional electrician or technician for consultation and processing. They will have a better understanding of how to use such circuits safely.

2.Contact your electric utility or local** agency for advice and guidance. They can provide professional advice and assistance.

3.Find other devices that meet safety standards to replace those that require electricity. For example, you can choose to use a cordless product or a product with an adapter plug.

In short, it is dangerous to try to use a circuit that only has a live wire and no neutral wire, so be sure to be cautious and keep an eye on it.

Only the live line does not have a trapped section zero line and cannot be used. It is common sense that the current needs a loop.

If you are not afraid of danger and breaking the law. You can do the ground wire instead of the zero wire. However, if there is a Wang Yuyu meter, it will not affect the electricity metering.

Two wires, namely the live wire and the neutral wire, are used to ensure the normal operation of the circuit. If there is only a live wire and no neutral wire, it may cause the circuit to be unstable or cause a dangerous situation such as electric shock. Therefore, it is recommended to make sure that both the live wire and the neutral wire are used when using two-phase electricity.

The person asking the question may not be an electrician or professional; At home, with 220V alternating current (two-phase electricity), the live wire will be connected through household appliances, lights and other resistors, so that the original uncharged zero line will also have trace electricity, using a universal meter or electric pen test, there are safe trace electric displays (please see the comparison shown in the figure below), this is a normal electricity situation.

There are two possibilities.

The first is that the way you measure is wrong, is it not measuring two points that are not the zero line you are talking about. Fireline location.

Second, yours is not an induction pen, this kind of pen is usually of poor quality, and there is a voltage display in many places for measurement. Caused a miscalculation for you.

There's nothing mysterious about these wires. Normally speaking, the live wire in China will have electricity, and the zero line must be out of power. Unless you're not the normal power supply for your home.

One fire and one zero is single-phase electricity, 220 volts.

Strictly speaking, the zero line is also electrified, and the normal operation of 220 volt electrical appliances is through the neutral line circuit, so the live wire and the working zero line are electrified. The grounding wire is the one that protects the safety.

Under normal circumstances, the zero line enters the switch, and when the switch is disconnected, the remaining zero line is connected to the live wire through the electrical appliance, so there is electricity for measurement with an electric pen.

It is normal for the live wire to have electricity, if the neutral line also has electricity, it is abnormal, the neutral line is electrified, basically the neutral line is broken or the contact is poor.

Indicate that the line is electrified, that is, the line you measure is in use, for example, if the light is on in your lighting line, then the electric pen fire line and the neutral line will be lit, or your TV, washing machine, etc. are in use, then the electric pen will also be bright. If you turn off all the lights and electrical appliances in your home, and no electrical appliances are in use, then you use a voltage tester to measure, the zero line will not be lit, only the live wire will be lit This phenomenon has two situations: 1. It is in a one-way circuit, that is, in a circuit, if the zero line is on, it means that the zero line is open; 2. In the three-phase circuit, this situation will also occur when the load of each phase is unbalanced or the internal turn and phase short circuit and the neutral point displacement of the three-phase alternating current.

3. The pressure drop is generated by the heating of the zero line. Extended information: causes and solutions of electrification 1, the zero line is not well grounded, if it is well grounded, the current will flow into the ground, with a pen will not be detected.

If the neutral line is detected to be live with an electric pen, either the neutral line is broken, or the contact is not good. But this is actually the result, not the cause of the zero line being electrified; 2. Reason: Under normal circumstances, there should be no electricity on the neutral line.

Therefore, once there is electricity, it must be a sign of failure; The simplest is electromagnetic induction, and at this time, the zero line is not well grounded and fails to form a loop; Secondly, the electrical equipment leaks or the phase wire touches the shell, but the current is not large, so it has not tripped; The neutral line is electrified, and the neutral wire is definitely not well grounded; After the problem is solved, go to the cause of the device. In the three-phase four-wire power supply system, if the neutral line is not well grounded or the ground terminal is broken, the consequence is that the potential of the neutral line is not equal to 0 when the three-phase load is unbalanced, that is to say, the neutral point is offset. The specific zero line potential is related to the three-phase load unbalance, the more unbalanced, the greater the neutral point offset, and the higher the potential of the neutral line.

After the neutral potential is offset, the phase voltage of the three phases is generally not 220V. Some phases may exceed 220V, while others may be below 220V. If the neutral point offset is too large, the phase voltage of the three phases may be burned out, and the phase voltage of the three phases may not work.

When the potential of the neutral wire is raised, the ground touch wire will cause a risk of electric shock when it reaches a certain value.

If there is a reverse connection in the line at the front end of your measurement, you can find it and change it. However, it can still be used, and the neutral wire is cut off when installing.

If the wire is not connected correctly, find a professional electrician to find the cause and deal with it.

Let's take a look at how the electricity comes from.

Agree with the statement of the first floor, the zero line is not that there is no electricity, but because the zero line is close to zero potential to the earth, and the human potential is equal to the earth, that is, the human potential and the zero line potential are basically the same, and there will be no current at the two points of the same potential, so people will not feel the current.

At present, the power supply is generally used.

Three-phase four-wire system.

with a three-phase five-wire system.

The difference is that there is one more five-wire system.

Ground. The three-phase four-wire system is one of the three lines of fire.

The zero line, between these three lines of fire.

The voltage is 380 volts and the neutral line is.

Neutral wire, the voltage of all live wires to the neutral wire is 220 volts, the neutral wire communicates with the earth, and is repeatedly grounded many times. Man is standing on the ground, and the potential with it is zero. You're right, just don't know it's grounded.