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How to distinguish between poor quality wire and cable

Nowadays, many people pay more attention to the decoration materials when they decorate their houses. Such as wires, etc. So how to distinguish the quality of the wire? How to choose the wire? Let's have a look!

How to distinguish the quality of the wire:

1. Look at the appearance of the wire. A good wire is packaged in a coil, and the appearance also has a certificate of conformity and specifications.

2. Measure, use a vernier caliper to measure the wire core, such as a 2.5-flat wire, the wire core diameter is 1.78.

3. Flame retardancy, use a lighter to ignite the wire, if the flame will automatically extinguish, it means that the insulating layer is qualified, otherwise it is unqualified.

4. The quality of the wire core, the good copper core is purple red, and the texture is soft. On the contrary, the copper core is purple-black and easy to break.

1. The quality of the wire is not good. If the strength of the insulating layer is not up to standard, it is easy to cause a short circuit accident, and even if it is energized for a long time, it will cause the danger of electric shock. 2. The copper wire of the wire is reduced or the copper content is not pure. This kind of wire has a large current loss, accelerated aging, and is easy to cause fire. 3. The size of the wire is unqualified, the strength is reduced, and it is easy to break during use.

How to buy wire:

1. Color

First of all, when choosing a wire, it depends on the color of the wire core. A good wire core is made of 100% pure copper, with good conductivity, and the color is purple and red. On the contrary, if the color of the wire core copper is yellow or light yellow , indicating more impurities.

2. Thickness

Secondly, when choosing a wire, look at its thickness, but remove the thickness of the insulating layer, that is, the thickness of the core. However, it is also necessary to refer to the color of the wire core. For example, the red copper wire core is thinner and the brass wire core is thicker. It is recommended to choose red copper, the stronger the conductivity.

3. Insulation layer

Finally, when choosing a wire, it depends on the outer insulation. It can be judged from several aspects. For example, a good insulated wire is thick and has good toughness. On the contrary, if it is rough, it means that the process is poor and it is easy to leak. A good wire will not leave traces after many times of bending, otherwise the wire has indentation or whitening, indicating poor toughness.

Summary: The above is the relevant content of how to distinguish the quality of the wire and how to buy the wire. I hope it can help friends in need. If you need to know more about it later, please pay attention to EJLED.COM.