What is a ground wire What is a ground wire used for

The ground wire is a protective cable that is reliably connected with the earth, because the ground of our foot, so the potential of the foot and the earth is the same, it can be considered as 0 potential, and the ground wire is reliably connected, so the potential of the ground wire is also 0, when the metal shell is charged due to leakage, when the person accidentally touches the shell, the shell is connected with the ground wire reliably, the resistance of the shell and the earth is 0 ohms, and the point touched by the human hand has two paths to the ground, and the resistance of the person is much greater than the resistance between the machine shell and the earth. According to the characteristics of the parallel circuit, the current flows through most of the path with low resistance, so most of the current flows directly into the earth from the ground wire connected to the machine, and the current flowing through the human body is so small that it has no effect on the person, and the person is safe.

It is a wire that is reliably connected with the earth, and the neutral wire in the three-phase transformer can also be said to be a grounding wire, and the so-called ground wire is mainly used in the protection line to protect people and equipment.

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.

I'm an electrician.

The middle wire of the three plugs is the ground wire, which is used to ground and prevent leakage.

Remember.

Ground wire: It is a wire that is reliably connected to the earth.

If the wiring is damaged, the electrical equipment can be electrified, and the electricity can be conducted underground through the ground wire to prevent people from being electrocuted.

Three plugs, the middle wire is the ground wire.

Ground wire is a kind of safety grounding guard wire in the electrical system or electronic equipment, which is connected to the ground, the shell or the wire with zero reference potential.

If you are still worried that you do not have a solid grasp of physics knowledge, resulting in a mess of the exam, then you must look at the content I want to talk about next, and I will introduce you to the basic physics knowledge - what is the ground wire, let's take a look!

01 On general electrical appliances, the ground wire is connected to the shell to prevent electric shock accidents caused by the internal insulation damage to the shell. Ground wire is short for grounding device. Ground wire is further divided into working grounding and safety grounding.

In order to prevent people from electrocution accidents when using electronic equipment such as home appliances and offices, the protective grounding is a kind of safety grounding guard.

02 The symbol of the ground wire is E (Earth Wire); It can be divided into two types: power supply ground wire and circuit ground wire. According to the current standard in China, when the third circuit in GB2681 is marked according to the color of the wire, it should generally be the phase wire - phase A yellow, phase B green, and phase C red. Neutral wire - light blue, the ground wire is yellow and green, if it is a three-pin socket, the left is the neutral wire, the middle (top) is the ground wire, and the right is the live wire.

03 The longer of the three pins in the triangle plug is grounded, which can be called the grounding pin, and the other two shorter pins are used to connect household appliances to the circuit, which can be called conductive pins. When designing the power plug, the grounding pin was consciously designed to be a few millimeters longer than the conductive pin in consideration for the user's safety.

A ground wire is a wire in an electrical system or electronic device that is connected to the ground, to the enclosure, or to a wire with a reference potential of zero. For general electrical appliances, the ground wire is connected to the shell to prevent electric shock accidents caused by the internal insulation damage to the shell and the live of the electrical appliance. Ground wire is short for grounding device.

Ground wire is further divided into working grounding and safety grounding. In order to prevent people from electric shock accidents when using electronic equipment such as home appliances and offices, protective grounding is a kind of safety grounding guardline. <

A ground wire is a wire in an electrical system or electronic device that is connected to the ground, to the enclosure, or to a wire with a reference potential of zero. For general electrical appliances, the ground wire is connected to the shell to prevent electric shock accidents caused by the internal insulation damage to the shell and the live of the electrical appliance. Ground wire is short for grounding device.

Ground wire is further divided into working grounding and safety grounding. In order to prevent people from electric shock accidents when using electronic equipment such as home appliances and offices, protective grounding is a kind of safety grounding guardline. Safety grounding generally includes lightning protection grounding and electromagnetic radiation protection grounding.

Ground wire is the abbreviation of grounding device, which is a wire that is connected to the ground, the shell or the reference potential is zero in the electrical system or electronic equipment. In general electrical appliances, the ground wire is connected to the shell to prevent electric shock accidents caused by the internal insulation damage to the shell. The ground wire is a kind of safety grounding guard.

Ground. There are two ways to connect the ground wire:

Use one end of the wire cavity to connect the ground wire jack contact, and bury the other end into the ground.

Use a metal pipe to insert it into the underground wood, and then connect the distribution box and socket with wires.

Please note that when the power is on, do not touch the ground wire with your hands.

The ground wire is a kind of safety protection device, which is used to connect the metal shell of the electrical equipment with the ground, so as to prevent the current from flowing into the ground through the human body when the electrical leakage occurs, so as to protect personal safety.

Under normal circumstances, the metal shell of electrical equipment is a large shield insulated from the ground, so when the electrical leakage occurs, if there is no ground wire, the current will flow into the ground through the human body, resulting in the occurrence of electric shock accidents. After having the ground wire, when the electrical leakage occurs, the current will flow back to the ground through the ground wire, thus avoiding the harm of the current to the human body.

Generally speaking, electrical equipment in homes and public places needs to be installed with ground wires to ensure personal safety. When buying electrical equipment, you can check the product manual or ask the salesperson if they are equipped with the Dishan imitation front. At the same time, when using electrical equipment, it is also necessary to pay attention to the safe use of electricity to avoid electric shock accidents.

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The role of the ground wire is to quickly introduce any leakage current that may occur in the circuit to the ground to ensure the safety of people and equipment. When the electrical leakage occurs, the leakage current will quickly flow back to the ground through the grounding wire, so as to avoid the occurrence of dangerous situations such as electric shock to the human body and damage to the electrical appliance. Therefore, the grounding wire is very important in the installation and use of electrical appliances, and it must be connected correctly and kept in good contact condition.

What is the use of ground.

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The role of the ground wire is to quickly introduce any leakage current that may occur in the circuit to the ground to ensure the safety of people and equipment. When the electrical leakage occurs, the leakage current will quickly flow back to the ground through the grounding wire, so as to avoid the occurrence of dangerous situations such as electric shock to the human body and damage to the electrical appliance. Therefore, it is very important to connect the Wangbo ground wire in the installation chain of electrical appliances and the use of shed stalls, and must be connected correctly and maintain a good contact state.

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Protective equipment: In addition to preventing electric shock to the human body, the grounding wire can also prevent damage to electrical appliances. For example, if there is a problem such as a short circuit or overload inside the appliance, the leakage will flow back to the ground through the ground wire, thus avoiding damage to the appliance due to excessive current shock.

2.Improved signal transmission: In some cases, a grounding wire can also be used to improve signal transmission quality.

The grounding wire can also be used to prevent static interference. In some cases, static electricity can cause electronic equipment to malfunction, and the use of a grounding wire can lead static electricity away through the ground, thus protecting the equipment from interference. Although the grounding wire seems simple, its role is very important, to ensure the safety of our life and property, and is widely used in various electrical appliances, communications, computers and other fields.