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At worst, the system will be automatically protected, and at worst, the control system voltage will be too high and burned.
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It's going to be fine, he's got the phase order to protect it.
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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.
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1. The ground wire is mainly used for protective grounding. That is, when there is leakage, the grounding will introduce the leakage into the ground and protect the user's safety.
2. If the live wire is reversed with the ground wire, the direct consequence is that the grounding body of the equipment is live (such as the metal shell of the equipment), which will lead to electric shock to the contact. At the same time, all electrical equipment will not work.
3. The neutral wire is reversed with the ground wire, and the neutral wire is generally not electrified. So there will be no problem with the reverse connection of the neutral line. However, if the front neutral wire is broken or the switch is connected to the neutral line (which is often the case in single-phase power supplies), the grounding body may be live. Leads to dangerous lines.
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The hazards of the inverse connection between the neutral line and the live 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. 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.
For another example, if the live wire and the neutral wire on the wall are reversed, if the socket bar used by everyone has a small switch on it, when everyone disconnects the switch, the socket is still live. Therefore, if the child uses metal to cut the jack of the socket, it will cause an electric shock, which is very dangerous.
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The landlord is shooting the circuit of the water heater, if the live wire and the neutral wire are reversed, the water heater increases the risk of electric shock. If the circuit in the water heater is damaged, it will cause the hot water to be electrified, which will eventually lead to electric shock.
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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.
The live wire is live, the ground wire and the neutral wire are not brought, there is a live wire in the socket of the household two jacks, a zero wire, the electric pen can be measured to be charged is the live wire, the uncharged is the neutral wire, the three-jack socket has a ground wire, and the ground wire should be connected to the shell of the electrical appliance to prevent the electrical leakage from making people electrocuted**.
In addition, the wiring position of each hole in the household socket is specified, if you disassemble the socket, you can see that the point marked with L is connected to the live wire, the N mark is connected to the zero wire, and the ground wire has a special grounding symbol. Those who don't understand must also connect randomly (especially the position of the ground wire), otherwise it may cause serious consequences.
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It depends on what you're plugging, it doesn't matter if you pick up a light bulb.
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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.
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1. Impact: The connection of the neutral wire and the ground wire together will cause great harm to personal safety and equipment safety, and the potential safety hazards are great. It is absolutely not allowed to be used.
2. Analysis: The ground wire is a safety protection wire connected to the shell of the electrical appliance, and the ground wire does not participate in the work of the line under normal circumstances. Only when there is a short-circuit fault between the electrical appliance and the shell, the voltage carried by the ground wire discharge electrical shell ensures that the voltage of the shell to the ground is 0V.
The neutral line is the electrical circuit of the electrical appliance, and the live wire current passes through the electrical appliance and returns to the power supply through the neutral line, that is, the current flows through the neutral line, so as to ensure the normal operation of the electrical appliance.
The neutral wire and the ground wire are connected together: when the electrical appliance is short-circuited to the shell, because the ground wire and the neutral wire are connected into one wire, the current will return to the power supply through two circuits, one is the neutral line circuit, and the other is the electrical shell ground wire power supply. At this time, if the neutral line is broken, all the equipment shells on the ground wire are participants in the current circuit, once the ground wire is also broken or the contact is poor, all the equipment shells will be electrified, as long as the human body touches any electrical shell will be shocked, and an electric shock accident will occur.
3. Common wrong connections and solutions for non-ground lines.
Common wrong connection: In the line without ground wire, such as the old line of the old house, it is usually one fire and one zero two wires, and the zero wire in the socket is led to the ground wire terminal by mistake and danger. At this time, if the neutral line is broken, the electrical shell of the socket will be electrified, causing a potential safety hazard of electric shock accidents.
Solution: Install a 2P leakage protection air switch in the distribution box of the entrance line. Once the line is short-circuited to the ground, the leakage protection switch will automatically power off immediately.
Fourth, the solution that the line of fire and the zero line cannot be distinguished.
Safety distinction method: disconnect the electric switch, check that there is no electricity. Connect an incandescent lamp between the live wire of any socket and any one of the remaining two wires, use a multimeter to measure the resistance of the live wire and the other two wires in the distribution box, the resistance is worth the wire connected with the bulb, and the infinite resistance is the suspended wire, according to what wire these two wires are in the distribution box, you can judge the zero wire or ground wire in the socket.
Professional detection: disconnect the power switch, remove the neutral wire and ground wire in the distribution box from the common end of the incoming line, and disconnect the connection with the incoming line. Connect the bulb with the above method 2 on the socket, close the switch, and measure which wire has electricity with an electric pen, and the wire with electricity is the unknown wire connected to the bulb, and the rest of the judgment methods are the same as above.
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The neutral wire is grounded at the transformer called the neutral line, and the voltage to the ground under normal circumstances will generally be zero or very small.
Of course, the ground wire at the user is grounded and connected to the metal shell of the electrical equipment for protection.
So if you connect the two wires together, you won't see any abnormal reactions, and there won't be any serious consequences for the time being. The problem is that the neutral line may produce a voltage to the ground at some point (although it is also grounded), and although the grounding resistance at the transformer is very small, if the phase line is short-circuited to the ground, a large short-circuit current to the ground will be generated when the phase line is short-circuited to the ground, and the neutral point of the transformer will flow back to the neutral point of the transformer through this grounding resistance, and the voltage of the centerline (neutral line) to the ground will rise to a voltage value that may endanger the safety of life. When the ground wire is connected to it at this time (the user side), the voltage on the ground wire is the voltage on the neutral line now, and the ground wire is connected to the shell of the electrical equipment, which means that the human body will contact this part, so it will also endanger the safety of the human body.
It may not be understandable again, the ground wire is not also connected to the ground, but for the user, the grounding condition of the ground wire is generally worse than the working grounding at the transformer, that is, the grounding resistance may be greater, when the ground wire is connected with the neutral wire, it is also equivalent to the repeated grounding of the neutral wire (zero wire), of course, the short-circuit current may also be part of the grounding resistance of the ground wire from the user - the ground wire - the neutral line - the neutral point of the transformer to form part of the circuit.
However, the common result is that when the strong current passes through the grounding resistance, it produces a voltage drop at both ends, so that the neutral line to ground voltage rises and the neutral line produces a dangerous voltage, which may endanger life safety when it is contacted through the above ways.
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First of all, the neutral wire and the grounding wire are forbidden to be mixed, which is prohibited in the electrical safety production code, and the mixing will endanger the safe use of electricity, and cause the switch to trip in the circuit with leakage protection switch.
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If the neutral and ground wires are connected together, a short circuit will occur. will make the electricity run to the ground.
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When the neutral and ground wires are connected together, a short circuit is formed.
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The neutral wire and the ground wire are connected together and have no effect, but they are not energized.
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The function of the neutral wire is to form a closed circuit with the live wire when the phase is electrified, and the ground wire is to discharge the leakage current of the electrical shell to the ground, so that people will not be electrocuted when they touch it.
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It will cause a short circuit and increase the risk of fire.
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The ground wire is not grounded. Is that called ground? This is equivalent to a double zero line, as long as these two are not grounded, it should be fine.
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For your safety, don't mix it up, it's good if nothing happens, it's a big deal if something happens. The neutral wire cannot be grounded repeatedly, and the ground wire can be grounded with heavy loads. The ground wire is the lifeline of our life, and if the electricity leaks it to protect our personal safety.
The zero line is loop-driven. Solution, you first temporarily remove the ground wire of the main electrical box, and then detect, the zero wire and the ground wire must be clearly distinguished. Don't forget to pick up the ground wire!!
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1.If the ground wire is grounded, it probably won't work properly unless your ground wire isn't grounded.
2.You'll have to test it with a pen or some other tool.
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Ground and neutral connections are dangerous and susceptible to electric shock.
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Some people may think that it is not a big deal if the zero line of the live wire is reversed, anyway, the electrical appliances can still be used, in fact, from a professional point of view, this situation will not only damage the electrical appliances, but also easily cause safety accidents.
First of all, because the switch of the electrical appliance is to control the live wire, if the zero line of the live wire is reversed, it will cause the switch to control the zero line, in this case, even if the power is turned off, the electrical appliance is still live, which is easy to cause electric shock accidents.
Second, even if the power is turned off during voltage fluctuations or lightning strikes, electrical appliances can still be damaged.
Third, because even if the power is turned off, the electrical appliance is still connected to the live wire, which means that the electrical appliance is connected to the live wire all year round, and the circuit board and insulation layer in the electrical appliance are more likely to age.
Fourth, it will cause damage to air conditioners, refrigerators and other electrical appliances with compressors.
Fifth, most families use power strips, that is, plug boards, you can use the power test test, the zero line of the live wire will make the power plug in the state of power off is still live, touch even if the power has been turned off the power strip plug door, the same will occur life-threatening serious electric shock, families with children at home should pay special attention to this problem.
In short, safety is no trivial matter, the circuit standards formulated by the state are not a joke, and it is very necessary to strictly abide by the national standards.
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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.
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If you use this kind of leakage protection at home, don't connect the wrong line when connecting the zero line of the fire wire, it is not safe to connect the wrong line of the fire wire.
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There is a possibility of electric shock to the metal shell electrical appliances, because the electrical appliances are designed according to the provisions of the power switch. When you turn off the electrical switch, you actually turn off the zero wire, and when you stop taking a test pen, you can measure that the metal shell has a strong induction. There is a feeling of electric shock when touched by the hand, and in severe cases, it will cause injury to people.
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The zero line of the live wire is connected to the wrong light, and the light will not be on, it must be changed, and the current equipment has been marked very clearly, **connect the live wire, **connect the zero line, and you will know it at a glance.
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The consequence of the direct grounding of the phase wire is: leakage tripping.
For the three-phase four-wire system of neutral wire grounding, the phase wire is directly grounded, and the leakage trip (although the earth is a conductor, the resistance is also very large).
For the three-phase three-wire system, there is no neutral line, and the voltage of the phase line to the ground is 220V, and there will be a large current for a short time and tripping.
The direct grounding of the phase wire is not a short circuit, different from the direct connection to the zero line, the direct connection to the zero line is a short circuit trip, the direct grounding of the phase wire is a leakage trip, the potential of the earth is 0, the voltage of the phase wire and the neutral line is 220V, and the voltage of the phase wire and the phase wire is 380V.
So in the circuit, leakage tripping, high current tripping and other protection are very important.
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If the power supply is connected to a leakage protector, the leakage protector will trip. If there is no leakage protector and the ground is very dry, there is no big problem, but some current will flow down the ground, if the ground is very wet, or there is water on the ground, the current will be very large, and the wire will be heated and even burned. And people walking by nearby are prone to electric shock
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