What does Cable Pe|Wire and Cable Pe Represent?

PE line, the English full name is protecting earth, and the simplified Chinese name is called [Protection Conductor]. That is what we usually call [ground wire]. The PE wire is a conductor specially used to ground the exposed conductive part of the electrical device. It does not matter whether it is directly connected to the ground electrode (TT) that has nothing to do with the grounding of the power point or grounded through the neutral point of the power supply (TN). Both are called PE wires.

The relationship between pe and PEN

The PEN wire is a conductor that functions as both a protective earth wire and a neutral wire. In the project, it is mostly used for a section of line between the low-voltage side of the substation and the user’s power inlet point (TN-C section of TN-C-S). The PEN line is to accurately and well ground the original neutral line, and at the same time connect the shell of the equipment to be protected to the PEN line. Therefore, the PEN line has the grounding properties of the above-mentioned PE line, and also has the nature of the load of the N line [neutral line, neutral line]. of. Once the PEN system encounters a grounding problem, the N wire will sometimes be charged due to unbalanced load, which can easily cause personal injury. So remember, if possible, you should try your best to deploy independent PE protection lines. Even if you don’t deploy PE protection, it’s better not to use PEN. I personally think that PEN lines are only for inspection unless they are needed in specific fields. He is even more dangerous than not deploying protection lines.

How to distinguish PE line

According to the provisions of GB9089.2: The protective conductor (PE conductor) is a conductor used to electrically connect any of the following components to meet certain needs: exposed conductive parts, external conductive parts, main grounding terminals, grounding electrodes, power grounding points or artificial grounding points. The neutral conductor (N conductor) is a conductor connected to the neutral point of the system and capable of transmitting electrical energy. It can be seen that the N line is the neutral line and the working line, and it is also called “zero line” in the single-phase system; without it, the equipment may not work normally. The PE wire is the ground wire connected to the equipment casing. Without it, the equipment may be able to work, but the casing may be charged; it can prevent electric shock accidents. In practice, people often connect it as a “protective neutral conductor”, that is, connect it as a PEN wire, which has the functions of PE wire and N wire.

The role of the ground wire pe

The role of the ground wire is very important, because the products of a type of structure need to rely on the ground wire as a safety protection. Since the internal structure of the first-class structural product is the basic insulation structure, once the basic insulation fails, the dangerous current will be guided to the ground through the protective grounding wire, thereby protecting people and property. Therefore, its symbol identification, wire size, insulation color, grounding wire impedance, and connection method all have very clear and strict requirements and test verification methods in the field of electrical engineering and safety regulations.

Classification of grounding wire pe

In order to facilitate maintenance, the country has unified the color and letter symbols of the wires. The colors of the three phase wires are yellow, green, and red, the letters are A, B, and C, and the single-phase live wire is represented by the letter L. The neutral wire is blue and the letter N. The ground wire is a yellow-green two-color wire with the letter PE. Single-core cables are generally black and there is no color difference. Some ground wires of multi-core cables are not yellow-green double-colored wires, but also black.