The difference between ground line light source and non-ground line light source of civil lamps

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2022-02-20

Civilian lamps in progressGround light sourceThere is a certain difference in the installation. The ground line light source of civil lamps can prevent electric shock caused by electric leakage. There is no civil lighting ground light source will lack of measures to prevent leakage. Therefore, it is recommended that all luminaires require a ground line light source for installation. The following is the difference between the ground line light source and the non-ground line light source of civil lamps.

Let's first analyze the situation of the ground line light source of civil lamps:

All lighting fixtures shall be provided with ground light source according to the specification. We should also know that its purpose is to prevent the danger of electric shock that may be caused by electric leakage;

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When using the grounding wire of the civil lamp, if the lamp or the lamp holder leaks, the leakage current will lead the leakage current to the grounding bar in the distribution box through the grounding wire, and then from the grounding bar to the grounding. The reason is that the grounding resistance is much smaller than the grounding resistance of the human body to avoid the risk of electric shock caused by leakage current flowing through the human body;

In addition, the leakage protection switch is rarely installed in residential lighting circuits (because many lights have slight leakage, which will cause the leakage switch to jump frequently). Therefore, we must install the ground wire in the civil lighting circuit. Many decoration companies do not install ground wires now. This practice is wrong and we must pay attention to it.

Secondly, let us analyze the situation of ungrounded civil lamps:

At present, many decoration companies have not installedGround light sourceIt is very simple to see whether the ground wire is installed in the lamp. We only need to see how many wires are in the bottom box of the lamp. If there are two wires, there must be no ground wire;

In addition, due to the characteristics of the lamp itself, the first installation position is relatively high, and the human body cannot be directly contacted. Second, many lamps have slight leaks. These two characteristics also lead to few lighting circuits in civilian circuits equipped with leakage protection switches;

Therefore, if the lamp has leakage, there is neither a ground light source nor a leakage protection switch in the circuit at this time, the leakage current will inevitably flow through the human body, which may cause electric shock damage to the human body.

InstallationGround light sourceThe role

Prevent equipment leakage, protect equipment and personal safety. When the device leaks electricity, when people touch the device, there will be current through the human body. If there is no ground wire, the current flowing through the human body will be very large, which poses a great threat to personal safety. If there is a ground wire, when the human body touches the equipment, the current flows out from the human body and the ground wire at the same time. At this time, the human body and the ground wire are connected in parallel. Because the resistance of the ground wire is very small, only a few ohms, and the resistance of the human body is much larger than the resistance of the ground wire, most of the current is introduced into the earth from the ground wire, and the current flowing through the human body is very small, which plays a role in protecting the human body. Great effect.


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