The distribution box is equipped with leakage protection, does it need a grounding wire?

A grounding wire is recommended.

Before solving this problem, it is necessary to understand what role the line plays in the power supply.

As we all know, the electrical equipment at home can work normally without the installation of ground wire, because household appliances do not need this ground wire support when they work normally, and home electricity only needs a live wire and a neutral wire, commonly known as single-phase power supply.

The purpose of installing the ground wire is mainly to prevent the leakage of electrical equipment and cause injury accidents. So with the leakage protector, do you still need to install a ground wire, from a safety point of view, it will be safer to install a protective ground wire.

When leakage occurs, the leakage protector will trip because of the presence of the ground wire; Because of the existence of the ground wire, the possibility of electric shock to the human body is avoided. Our lives cannot be completely pinned on the protection of the leakage protector, in case the leakage protector fails due to failure, then the person who is electrocuted is quite dangerous. At the same time, due to the existence of the ground wire, when the leakage protection fails, the larger leakage current can make the protection device of the electrical equipment act, thereby cutting off the power output, such as fuse blowing.

Although with the improvement of technical conditions, the performance of electrical equipment to prevent leakage has been relatively improved, but it is still impossible to prevent it, such as the leakage incident of Haier refrigerator, the big factory is just a legend, and it is better to be more careful.

The ground wire design requires a certain amount of relevant professional knowledge, the ground wire has an on-resistance, the lower the resistance value, the better, please refer to the relevant ground wire design knowledge.

At the same time, the leakage protector and the protective ground wire cannot replace each other, and in the best case scenario, both.

Under normal circumstances, the ground wire is an advanced distribution box, and then go to each socket, it is very convenient to consider when laying the line, if it is a dark line and the ground wire has not been laid before, it is a bit troublesome.

Whether you want to rectify the line, you can communicate with the electrician. In actual use, many old houses actually have no ground wire.

It is necessary to install the grounding wire, if the inlet wire of the switch touches the switch of the electric box, it will not protect the action, and once the person touches the electric box, it will be dangerous.

If there is a leakage protector, there must also be a grounding wire.

The leakage protector cannot replace the grounding wire, and the grounding wire connects the metal shell of the electrical appliance with the earth when the electrical appliance is used. Under normal circumstances, the shell of the electrical appliance is not electrified, and it will not be dangerous for people to touch it. However, there are always some unpredictable reasons in the process of electricity use, which causes the metal shell of the electrical appliance to be electrified.

The leakage protector is determined by comparing the current of the live wire and the neutral wire. When the difference between the two currents reaches the set value, the leakage protector will automatically trip and cut off the circuit.

If the leakage protector is installed without grounding the wire, once the metal shell of the electrical appliance is electrified, only when the person comes into contact with the metal shell, the leakage phenomenon will occur, and the leakage protector may cut off the circuit in time, but the current has flowed through the human body, which will cause harm to the human body.

If good grounding is ensured, as soon as the electrical appliance is energized, there will be current flowing to the ground, and the leakage protector will cut off the circuit when the leakage phenomenon occurs, reminding the circuit to be repaired in time to eliminate potential safety hazards.

Hello, according to the national electrical safety standards, the secondary distribution box must be grounded, otherwise there will be potential safety hazards. Therefore, I don't think you should use a three-phase four-wire leak warranty without grounding wires. The grounding wire is an important measure to protect personal safety, it can introduce the leakage current of electrical equipment into the ground, avoid the current passing through the human body, causing electric shock accidents.

If the secondary distribution box is not grounded, the leakage current cannot be introduced to the ground in time, which may cause harm to the human body. Three-phase four-wire leakage protection is a device to protect electrical equipment, which can cut off the power supply in time when there is leakage of electrical equipment to avoid damage to the human body and equipment caused by leakage current. However, if the secondary distribution box is not grounded, the leakage current cannot be introduced into the ground in time, and the leakage insurance cannot be operated normally, so that the electrical equipment and personal safety cannot be protected.

Therefore, I recommend that when you use the secondary distribution box, you must connect the ground wire to ensure personal safety and the normal operation of the equipment. At the same time, it is also necessary to regularly check whether the grounding wire of the distribution box is normal to ensure the safety of the crack.

Summary. 1. What is the standard of the grounding wire of the distribution box shell, and the metal box must have grounding bolts for processing, and it must be connected with the grounded PE row with copper wires; The metal conduit connected to the box must be connected with the electrical adjacent to the box; The electrical parts in the box should be grounded and connected with the PE row; All the ground wires in the circuit are used, and they must be led out through the PE row.

1. What is the standard of the grounding wire of the distribution box shell, and the metal box must have grounding bolts for processing, and it must use copper wire and grounded PE row to connect in a tan Yingqi; The metal conduit connected to the box must be connected with the electrical adjacent to the box; The electrical parts in the box should be grounded and connected with the PE row; Limb Xinqing uses all the ground wires in the circuit, and all of them are held to be drawn out through the PE row.

Second, how to return to the front box of the power distribution leakage used at home 1, pay attention to the quality of the material at the beginning of the first check its material, now the distribution box on the market has plastic, metal, of which the metal material is more durable, impact resistant, but there will be rust and corrosion when it encounters water stains; Although plastic is light in weight and inexpensive, it is not very durable, so it is recommended that you can buy it according to the actual situation at home.

2. Note that the structure of the distribution box is also very important, such as on the market, it is usually divided into concealed and surface-mounted, in fact, it is very easy to understand, surface-mounted is actually to install the box outside, on the contrary, concealed installation is to bury the box. You might as well choose according to the decoration style of the interior. 3. Pay attention to the integrity of the interior of the distribution box, it must be to see whether the accessories inside are complete, and the accessories in the high-quality distribution box are complete.

In addition, at the time of purchase, you can also use an electric pen to check whether there is no problem with the insulation of the distribution box.

4. Pay attention to the transparent window when buying the distribution box, it is recommended to buy the distribution box with a transparent cover, which is not only more beautiful, but also easy to maintain.