What is the difference between the neutral and ground wires, and what is the difference between the

The zero line is also called the "middle line". Three-phase four-wire power supply: In addition to ABC, there is also a neutral wire (which is drawn from the neutral point of the transformer) in addition to the ABC three-phase wire. The three phase wires are all live wires, and the voltage between the three phase wires and the neutral wire is called the "phase voltage" (i.e., 220V) under normal circumstances.

The power supply company connects to each household one of the phases of the three-phase live wire, plus a neutral wire. So what is the "ground wire" at home, the ground wire is a grounding wire set up by the developer when building the building, and this ground wire is not connected with the live wire and the zero wire. The ground wire is usually only connected to the ground post of the three-eye socket, which can prevent the shell from being numb when the home appliance leaks, and urge the leakage protector to operate reliably.

The live wire and the ground wire are also 220V, when it is not allowed to be used in this way (this is called "one fire and one place" electricity, and the leakage protector can not be used in this way). Many people have put the ground wire and the zero line together, and there are endless troubles.

The neutral wire allows the current to form a loop, and the ground wire directs the current into the ground (e.g., electrical leakage).

The difference between the neutral wire and the ground wire is that the neutral wire is a wire drawn out after the neutral point of the transformer is grounded, while the ground wire is a wire drawn out of the metal buried in the ground near the equipment He cannot be used for working circuits, but can only be used in protective circuits. The neutral line can be used in both the protection circuit and the working circuit.

That's right... The ground wire is used to protect the wire and prevent electric shock when the person leaks. The neutral line is the circuit circuit. The neutral wire and the ground wire cannot be used together.

Ground is a general term for a zero-potential wire drawn from the earth. It can be functionally divided into working place, protection ground, shielding ground, etc., which provide neutral working point, pressure relief point (such as lightning protection) and anti-interference shielding for the equipment respectively. The neutral wire is actually the working ground wire, which provides a working zero potential point.

Just look up the difference between a 3-phase 4-wire system and a 3-phase 5-wire system!

The line of fire is a concept in the two-phase system.

The ground wire is connected to the earth discharge.

The difference between the neutral wire and the ground wire.

The neutral wire is the power supply end ground, and the ground wire is the user end ground.

1. The difference between the neutral wire and the ground wire.

The neutral line is grounded at the power supply end (power plant, substation, transformer), or repeatedly grounded before entering the home, it is a working grounding wire, which is part of the transmission line, and the current passes through the power plant live line load and the neutral line is reversed back to the power plant. The ground wire is grounded at the user end and connected with the metal shell of the electrical appliance or the touchable part of the human body, so that the chassis is equipotential with the ground to protect the human body from electric shock. The neutral line does not form a loop with the transmission line, and there is no current under normal circumstances.

Note the difference between the two:

1. Wire and ground wire are two different concepts, not the same thing, do not interchange or mix.

2. The ground potential of the ground wire is zero, and it is the nearest ground.

3. The ground potential of the neutral line is not necessarily zero. The neutral line is grounded at the nearest substation, and there may be a certain potential difference between the local ground.

4. The neutral line sometimes electres. When there is power in the live wire, but the equipment is not working, it may be that the neutral wire is broken, and the neutral wire near one end of the equipment from the breakpoint is with 220V electricity, which is the same as the live wire.

2. How to distinguish between the zero wire and the ground wire.

1. Wiring standard.

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. Facing the 3-pin socket, left zero, right fire, middle ground.

2. Install a leakage circuit breaker on the bus, and connect a bulb to the live wire and the neutral wire or the live wire and the ground wire, if the leakage circuit breaker action indicates that it is the ground wire, otherwise it is the neutral line. Pay attention to safety during the test, there may be small sparks, be prepared in your heart, don't be scared!

1. The role is different.

The neutral wire is mainly used in the working circuit, combined with the live wire, there is a current passing through, and the current passing through the neutral line of each phase is equal to the current passing through the corresponding one-phase live wire. Whereas, the ground wire is mainly a protection wire, and no current passes through.

2. The wiring position is different.

The neutral wire is the wire that is ground at the neutral point of the transformer and then pulled out, whereas the ground wire is the wire that is pulled out in the grounding device of the building.

3. The practical application after electric shock is different.

If there is a good grounding wire, it can effectively trigger the leakage protector to power off, and play a role in protecting the electrical safety of electrical appliances.

Each household can disconnect the zero line by itself, the two can not be interchangeable, once the ground wire is used as the working zero line, if the current is too large, the grounding protection wire is burned, at this time all the electrical shells below the disconnection point will be electrified, which will bring greater risk of electric shock.

1. Differences in structure:

Neutral line (n): Leads out the trunk line after grounding from the neutral point of the transformer.

Ground wire (PE): After grounding from the neutral point of the transformer, the main line is drawn out, and the grounding is repeated every 20-30 meters according to the standard.

2. The difference in principle:

Neutral line (n): Mainly used in working circuits, the voltage generated by the neutral line is equal to the line resistance multiplied by the current of the working circuit. Due to the long-distance transmission, the voltage generated by the neutral line cannot be ignored, and it becomes unreliable as a measure to protect personal safety.

Ground wire (PE): not used for working circuits, only as a protective wire. Using the absolute "0" voltage of the earth, when the leakage occurs in the equipment shell, the current will quickly flow into the ground, even if there is an open circuit in the PE line of the family section, it will also flow into the ground from the nearby grounding body.

Difference Between Neutral and Ground:

1. The role is different.

The neutral line is mainly used in the working circuit, which is connected to the live wire, and there is a current passing through it, and the current passing through all the neutral wires is equal to the current passing through the corresponding live wire. The ground wire focuses on the protection wire, and no current passes through.

2. The wiring position is different.

The neutral wire is the neutral point of the transformer grounded and then pulled out of the wire. Whereas, the ground wire is the wire that is pulled out during the grounding installation of the building.

3. The potential to the ground is different.

The ground potential of the neutral wire is not necessarily zero, whereas the ground potential of the ground wire is zero.

Precautions for home wire connection and use.

1. The wire connection should not be wrong.

In the process of connecting the live wire, neutral wire and ground wire, it is not possible to connect the wrong one, otherwise it is very easy to have potential safety hazards, and the shadow shirt will be used safely in the future.

2. Do not touch metal and auspicious electricity.

As we all know, metal objects carry electrical conductivity, so at any time, everyone should not use metal objects, such as screwdrivers or nails, to touch electric or nuclear sources to avoid electric shock.