Why is electricity divided into a live line and a neutral line?

This statement is not accurate. For the commonly used three-phase four-wire system, there are three live wires and one neutral wire, and the voltage between each live wire and the neutral wire is 220V, and the voltage between the two live wires is 380V. There is no absolute high and low potential for AC sinusoidal signals, because the potential changes over time.

It's like water, it's only when one side is high and the other is low, and there's a difference in value that you have the power to flow.

Because electricity has positive and negative electrodes, those with high potential are positive, and those with low potential are negative.

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In order to make the alternating current have a very convenient power conversion function.

Usually the power transmission is in the form of three phases and four wires, the three ends of the three-phase electricity are called phase wires, and the three tails of the three-phase electricity are connected together to be called neutral wires, which are also called canned potatoes"Zero line"。The reason why it is called the zero line is that there is no current in the neutral line at the time of the three-phase equilibrium, and then it is directly or indirectly connected to the earth, and the voltage with the earth is close to zero.

The earth is a good conductor, and the ground wire is short-circuited to the earth through a deeply buried electrode. The transmission of mains power is in a three-phase way, and there is a neutral wire, and the current of the neutral wire is zero when the three-phase is balanced, commonly known as it"Zero line"Another feature of the neutral wire is that it is short-circuited with the ground wire in the total distribution input of the system, and the voltage difference is close to zero. The three phase wires and the neutral line of three-phase electricity have a voltage of 220, which will produce electric shock to people, commonly known as it"Fireline"。

In principle, the BAI live line is the same as the neutral line.

It's just that when the power plant is far away from the transmission, the farther away it is from the back, the more it is needed.

The longer the wire, the greater the resistance of the wire. However, in the case of long-distance transmission, if the earth is used as a conductor, the resistance of the earth is much smaller than that of the wire over a long distance, and this can also save most of the cost. Usually when we touch the wire with our hands, there will be an electric shock, some people can't figure it out, he thinks he only touched a wire, how can it be electrified?

In fact, he has already touched two wires, and the other line is the earth. Electricity flows from the human hand through the human body through the soles of the feet, and then through the earth to form a circuit, which is the so-called single-wire electric shock.

In the circuit, the zero line is the line connected to the earth, if you touch it with your hands, I guarantee that you will not be electrified, because what you touch in your hands is the zero line, and your feet stand on the earth, the earth is also the zero line, that is to say, what you touch is only a wire, a single wire is not able to form a loop current, so the electricity does not touch you.

The live wire is transmitted directly with the wire, it is not connected with the earth, and the whole earth can only be used as a wire, once it is decided to use a certain wire to ground, it can not be grounded in the second wire, if it is connected again, it is a short circuit!

As for how to wiring, you can directly connect the neutral wire and the live wire to the electrical appliances, it is not direct current, it is alternating current, there is no need to divide any positive and negative polarity, and it does not have positive and negative polarity, AC is the meaning of the + - voltage of the two wires constantly changing alternately.

There is no essential difference between the neutral line and the live wire, which is just two lines that make up the power supply of the circuit equipment, the difference is that the neutral line is grounded on the low-voltage side of the transformer, which belongs to the typical working grounding, and the purpose is to obtain a reference point of zero volt potential as a reference point, which is a typical anchorage, because the zero line has a current, and there will be a voltage difference through the wire.

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Why is the pro-wire divided into live wire and neutral wire: The live wire and neutral wire constitute the main power source of 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 with the earth, and the wheel 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. Hope mine can help you <>

Do you have any other questions?

Summary. Hello dear, in the circuit of household electricity, there are usually two live wires (or phase wires) and one neutral wire. This circuit layout is known as a single-phase alternating current system, and it is designed to transmit electrical energy safely and efficiently.

The following are the functions and uses of two live wires and one neutral wire:1Live Wire (Phase Wire):

It is usually divided into phase line (L) and neutral line (N). Phase Line (L): Used to provide the transmission of current.

Phase lines usually carry voltage, power, to the desired equipment or device. – Neutral (n): Typically used as a loop return path to return current from the appliance being used to the mains.

The voltage of the neutral wire is close to the ground wire, providing a path to return current to ensure the closure of the circuit. 2.Zero line

The neutral wire is also a part of the neutral wire and is mainly used to provide the safety of the circuit and connect to ground. - Safety: The neutral wire is used to connect the metal enclosure or other accessible parts of electrical equipment to ground to provide a safe path for fault current.

When the insulation of electrical equipment fails, the fault current can flow directly through the ground wire back to the power supply through the path provided by the neutral wire, thus saving people from the danger of electric shock.

Why does a circuit have two live wires and one neutral wire? What is this for? Thank you!!

Kiss! Hello, a blessing, a warmth, a touch I am a little Song teacher who asks, engaged in this industry for a long time, and has a grateful heart, life is touched everywhere! Your question has been received, it will take a little time to type, please wait 1-4 minutes for a reply <> you

Hello dear, in the circuit of household electricity, there are usually two live wires (or phase wires) and one neutral wire. This circuit layout is known as a single-phase alternating current system, and it is designed to transmit electrical energy safely and efficiently. The following are the functions and uses of two live wires and one neutral wire:

Rock burial 1Stockings (phase): Usually divided into phase line (L) and neutral line (N).

Phase Line (L): Used to provide the transmission of current. The phase line usually carries the thick good voltage, ** power to the required equipment or device.

– Neutral (n): Typically used as a loop return path to return current from the appliance being used to the mains. The voltage of the neutral wire is close to the ground wire, providing a path to return current to ensure the closure of the circuit.

2.Neutral wire: The neutral wire is also a part of the neutral wire and is mainly used to provide the safety of the circuit and connect to ground.

- Safety: The neutral wire is used to connect the metal enclosure or other accessible parts of electrical equipment to ground to provide a safe path for fault current. When the insulation of electrical equipment fails, the fault current can flow directly through the ground wire back to the power supply through the path provided by the neutral wire, thus saving people from the danger of electric shock.

Why does a circuit have two live wires and one neutral wire? What is this for? Thank you!!

Hello, I am glad to answer for you, the following is the answer for your query, I hope it will help you There are two live wires and one neutral wire in the circuit designed to ensure the safety and stability of the current. The live wire is the main current carrier in the circuit, which provides electrical energy to various electrical devices. The neutral line is used to transmit the current from the electrical equipment back to the power supply to form a closed loop.

The function of the live wire and the neutral wire is to cooperate with each other to ensure the normal flow of the current. The live wire provides electrical energy, and the neutral wire will send the current**, so that the circuit forms a complete circuit. Such a design can ensure the stability and safety of the current.

The difference between the live wire and the neutral wire is the magnitude of the potential difference. The live wire has a higher potential and is positive, while the neutral wire has a lower potential and has zero potential. This design ensures that the current flows from the high potential to the low potential, avoiding the reverse flow of the current and the damage to the electrical equipment.

In a word, the two live wires and one neutral wire in the circuit are designed to ensure the safe and stable transmission of current, ensure the normal operation of electrical equipment, and avoid the reverse flow of current and damage to electrical equipment. The above is all my reply, I hope it can help you, I wish you a happy life