What are the hidden dangers of the reverse connection between the neutral line and the live wire?

If you first connect with the live wire, generally speaking, there is no danger on the socket will not have an impact, one end is connected to the wire, a week is connected to the live wire AC regardless of positive and negative which end is connected to which end, but the coffin is not good, the coffin must be the live wire into the control line out of the light, and then the lamp is connected to the zero line, so that when your switch is disconnected, the lamp is not charged, the switch is reversed and the light is electrified, and the switch is turned off if the energy-saving lamp is reversed. And when the switch is turned off, the light will not flash again.

Normal use is fine, but there are safety hazards.

Generally, the switches of electrical appliances are connected to the live wire.

If the live wire and the neutral wire are reversed, it is equivalent to the switch being connected to the neutral wire.

For example, when the light is turned off and the bulb is replaced, the live wire on the lamp holder is not disconnected, and it may be electrocuted, which is very dangerous.

There is no problem with electrical appliances, but if the switch is serviced, there is a problem.

Usually the switch is connected to the live wire, but now it is connected to the zero wire.

The fire wire is disconnected, and the person will not be electrocuted when he touches the neutral line.

The zero wire is disconnected, and the person will be electrocuted when he touches the fire wire.

So there are safety hazards.

Moreover, it doesn't matter if you don't thunder when you connect it in reverse, a thunderstorm, the discharge tube acts, and with the continuous power supply on the fire line, there is no way to stop the arc, which will lead to a disaster.

Fire, ground, and neutral.

The line and neutral line form the main power source for power supply.

At the power supply end, the neutral line of the three-phase power supply (that is, the midpoint of the three-phase transformer) is grounded, that is, the neutral line is connected to the earth, so it is called the neutral line.

The neutral line of live wire refers specifically to: the power supply line of civil electricity, and the AC power supply voltage of the mains is 220 volts (V). It consists of a neutral wire n and a live wire l, the neutral wire is grounded (the ground is zero), so it is called the neutral wire.

The ground wire, also known as the lightning cable, is a wire used to introduce electricity into the earth; When electrical equipment leaks or the voltage is too high, the current enters the ground through the ground wire.

2 And then we're looking at what the great nations say.

According to the national regulations of household sockets, left zero right fire, such regulations are mainly for standardization, convenience and maintenance.

The color of the line of fire (L) shall be red, yellow, and green; The color of the zero line (n) shall be black and blue; The color of the ground wire (PE) shall be yellow and green. Face 3-pin socket, left zero, right fire, middle ground.

The live wire and the neutral wire are connected incorrectly, although it will not affect the use of electrical appliances, but there will be problems with safe electricity use.

Because the electrical control switches at home are used to connect the live wire, and if the live wire and the neutral wire of the socket are reversed, the neutral wire will directly control the home appliances.

Even if the switch is disconnected, the inside is still charged at this time, and if the bulb is turned off, it will appear to be slightly bright. If a child uses a metal device directly into the socket hole, it will cause a risk of electric shock.

The control line and the neutral line of the lamp are distinguished:

1. In the home lighting system, the voltage value is 220 volts, and there is a live wire and a neutral wire in the circuit. And the switch needs to be connected to the line of fire, which is also a common sense. The switch controls the live wire, the output of electrical products.

In the case of an outlet, access to a light with on/off control is required.

2. First of all, we can see that there is a red wire, which is generally a live wire. It can be done with an electric pen.

To distinguish and determine, the live wire needs to be connected to the switch, and then the output, and the neutral wire to the bulb. Next, turn off the main switch.

The live wire is connected to the switch, and the other end is connected to the light bulb with the neutral wire.

3. Then find the zero line and pass through the multimeter.

If it can be distinguished, it is not lit or there is no voltage to indicate that it is the neutral line, and then it can be wired correctly.

If the live wire and neutral wire are reversed, the device will be damaged.

If the neutral wire and the live wire are reversed, it is very likely to damage the equipment, and even lead to a fire accident, because the voltage value of the neutral line is 0, and the voltage value of the live wire is 220V, the connection of the two will lead to a strong current through, at this time, a huge amount of heat will be generated, and the metal can be melted in serious cases, and even cause fire accidents such as electric collision.

It can be seen that special attention should be paid to the wiring, and the neutral wire and the live wire must not be reversed. If you don't know the knowledge of electricity connection very well, it is more reliable to ask a professional electrician to deal with it.

How to choose home improvement wires?

1. When we buy home improvement wires, we first check how the outer packaging of the wire is, whether the appearance is intact, and whether there is information such as 3C certification, manufacturer name, trademark and production date on it. If severe damage is found, it is recommended not to purchase such products.

2. Due to the large load power, stable performance and good flexibility of copper core wire, it is more expensive than ordinary aluminum wire, but it is still recommended that you buy copper wire, otherwise the wire will fail in the later stage and it will be more troublesome to repair.

3. When purchasing wires, it is necessary to choose according to the size of the section and the type of core, and also combine the actual situation to determine, the home improvement wire is suitable for single-strand wire, with a long service life and is not easy to oxidize.

4. When purchasing wire brands, try to choose well-known brands, such as Baosheng, Chint, Jinbei, etc., these reputations are very good, so that the product quality is more guaranteed, and the after-sales service is better.

If the live wire is reversed to the neutral wire, it is difficult to find the abnormality in the initial daily use, but it is easy to cause electric shock, which will also cause some household appliances to fail to work normally.

The switch used to control the live wire has actually become a switch to control the neutral line, which will cause the fluorescent lamp and other electrical appliances to appear faint flashing after the light is turned off. The control switch of some household appliances is used to control the live wire, if it is reversed, it will cause the control switch of the household appliance to control the zero line. That is, when the switch of the appliance is disconnected, the inside of the appliance is electrified.

Therefore, the live wire and the neutral line cannot be reversed.

Precautions for power connection:

1. To prevent electric shock and short circuit.

2. Pay attention to the switch to control the live wire.

3. It is best not to connect the fuse on the zero line.

4. The center of the lamp holder is connected to the fire wire.

5. Do not mix the grounding wire and the neutral wire.

6. Cut off the fire wire with electrical appliances, so that the electrical appliances will not be electrocuted, and if the zero line is broken, the people will be electrocuted if they touch the electrical appliances.

Generally speaking, there is no danger on the socket will not have an impact, one end is connected to the wire, a week is connected to the live wire AC regardless of positive or negative which end is connected to which end, but the coffin is not good, the coffin must be the live wire into the control line out to connect the lamp, and then the lamp is connected to the zero line, so that when your switch is disconnected, the lamp is not charged, the switch is reversed, the light is live, the energy-saving lamp is reversed, the switch is turned off, the light will flash, and the switch light will not flash again.

If you don't pay attention to the installation, the live wire is reversed from the neutral wire. In this case, the reversal of the live wire and the neutral wire will not affect the use of electrical appliances at home, but there are hidden dangers for safe electricity use. The main thing is that the control switch of some household appliances is used to control the live wire, if the live wire at the socket is reversed with the neutral wire, it will cause the control switch of the household appliance to control the neutral line.

Although it will not break the appliance. But don't turn the light switch in reverse, now the LED light is commonly used, if it is reversed, the switch is turned off, there will still be voltage on the lamp, which is not safe, and the LED light will not be turned off or emit a weak light at night, which affects sleep and reduces the service life of the lamp.

The location is the company's residential building, the fault phenomenon is also the electrical appliances are always burning, has not been able to find the reason, later I checked the socket circuit, found that the household line is three fires and one zero one, winter, more high-power electrical appliances, all electrical appliances share a zero line, the zero line bears the largest current, the current is large, the line is easy to get hot, for a long time, the zero line under the empty opening of the main air is aging and virtual connection, the zero line contact is good when the socket voltage is normal 220V, once the line is hot, the contact is not good, If you measure the socket voltage, it will become more than 300V, and some sockets are directly close to 380V, so some electrical appliances will burn out if they can't stand the high voltage.

If you first connect with the live wire, generally speaking, there is no danger on the socket will not have an impact, the dedicated end is connected to the wire, a week is connected to the live wire AC regardless of positive or negative which end is connected to which end, but the coffin will not work, the coffin must be the fire wire into the control line out of the light, and then the lamp is connected to the zero line, so that when your switch is disconnected, the lamp is not charged, the switch is turned off the light is live, and the switch is turned off if the energy-saving lamp is reversed. And when the switch is turned off, the light will not flash again.

A short circuit in the circuit may occur, resulting in a fire.

It can cause short circuits in circuits, generate sparks, and even cause wires to burn.

The circuit should be out of order, and in severe cases, there may be an accident.

I think something should happen to this** or something.

Except for the LED light that will flash, nothing else has any effect.

This will cause a short circuit.

It's going to be dangerous, it's not safe.

It's going to catch fire, it's a dangerous situation.

This will be a short circuit, and it will be dangerous.

It's going to be very dangerous, and it's going to make people scared.

This is an obvious short-circuit phenomenon.

In the general two-phase circuit, the neutral wire and the live wire are reversed, which has no impact on the role of electrical appliances, but for personal safety, it is equivalent to a layer of protection. If the live wire and the neutral wire are reversed, it is equivalent to connecting the switch to the neutral wire.

When it is necessary to change the light bulb, we always turn off the electric light, at this time, the metal part of the light bulb is electrified, and when the person touches the metal part of the light bulb, there is a risk of electric shock. If the neutral wire and the live wire are not reversed, the switch controls the live wire, turn off the switch, and the metal part on the bulb will not be electrified, which is safer in comparison.

Of course, the protection of people does not stop there, for example: install the lights higher, people can't reach the ground when changing the light bulbs, need to stand on the stool, don't change the light bulbs with wet hands, turn off the electricity when changing the light bulbs, etc.

If the live wire and the neutral wire on the wall are reversed, if there is a small switch on the socket row you use, when you disconnect the switch, the socket will still be electrified. Therefore, if the child uses metal to cut the jack of the socket, it will cause an electric shock, which is very dangerous.

The live wire, also known as the phase wire, forms a power supply circuit together with the neutral wire. In the low-voltage power grid, the power is transmitted by a three-phase four-wire system, in which there are three phase wires and one neutral line. In order to ensure the safety of electricity, the three-phase five-wire system is used for power supply in the user use area, and the fifth wire is the ground wire, one end of which is buried deep in the ground with a metal conductor near the user area, and the other end is connected with the ground wire contact of each user, which plays the role of grounding protection.

According to Qeeka Home experts, the main difference between the neutral wire, the live wire and the ground wire is that the voltage is different, so when wiring, the neutral wire must be connected with the neutral wire, and the live wire must be connected with the live wire, so as to ensure the safe operation of the circuit. So, what happens if the neutral wire and the live wire are reversed? How to choose home improvement wires?

Let's take a brief look at it below.

1. What happens if the neutral line and the live wire are reversed.

The reverse connection between the neutral wire and the live wire may damage the equipment and even cause a fire, because the voltage value of the neutral wire is 0, while the voltage value of the live wire is 220 volts, and the connection of two points will produce a very large current, generate huge heat, and can even melt the metal, so the neutral wire and the live wire must not be reversed.

Second, how to choose home improvement wires.

1. When purchasing home improvement wires, you must first check whether the packaging of the wire is in good condition, if you find that there is serious damage, it is recommended not to buy, in addition, you also need to check whether there is 3C certification on the outer packaging, manufacturer name, trademark and production date and other information.

2. Because the power of the copper core wire is relatively large, the performance is more stable, the flexibility is good, and the service life will be longer, so the corresponding ** will be much more expensive than ordinary aluminum wire, but when purchasing, it is still recommended to buy copper wire, after all, the wire is faulty, and it is very troublesome to maintain.

3. The wire can be divided according to the size of the cross-section, or according to the type of wire core, and must be decided in combination with the actual situation when purchasing, the general home improvement wire is more suitable for single-strand wire, with a long service life and not easy to oxidize.

4. There are many brands of wires, and when purchasing, we should try to choose well-known big brands, such as Baosheng, Zhengtai, Jinbei, etc., which have a good reputation, and the brand was created relatively early, the product quality is guaranteed, and there is perfect after-sales service.

Summary: The above about what will happen if the neutral wire and the live wire are reversed, and how to choose the home improvement wire is introduced here, I hope it will help you. If you want to know more about related information, please pay attention to Qeeka Home.