National standard cable how to distinguish between true and false

1, see the various product certification

The most direct way to distinguish true and false GB cables is to see whether there are quality system certifications; see if the certificates are regulated, whether there are factory names, site names, inspection seals, production dates, etc.; Specifications, voltage, etc. These certificates are all available to regular manufacturers. If there are no detailed quality certifications, we must carefully consider when purchasing.

2, try to feel

Take a wire head repeatedly bending by hand, all the soft feel, anti-fatigue strength, plastic or rubber feel elastic and wire insulation without cracks is the superior product.

3, inspection jacket

The insulation layer of shoddy products seems to be very thick, but in fact most of them are made of recycled materials, which have poor toughness, poor resistance to damage, and easy peeling and cracking. Especially in the home improvement process, they are very easy to wear and have huge potential safety hazards. . As long as the general insulation sheath is free from metal impurities in the material, it can pass through during the high pressure test, but ordinary consumers can identify the quality of the sheath through a simple stretching method. The insulating sheath of the feed back material is mostly mixed with calcium carbonate, and it will appear white and easily broken during stretching.

4, weighing length

National standard wire and cable, generally its weight is within the specified range. For example, a commonly used plastic insulated single-stranded copper wire with a cross-sectional area of ​​1.5mm2 is 1.8-1.9kg per 100m; a 2.5mm2 plastic insulated single-stranded copper wire has a weight of 3-3.1kg per 100m. Poor quality wires may have insufficient weight and may be caused by too much impurity in the copper core of the wire. In addition to weight, we can also look at the length. The country has not forced the cable to beat rice. However, many manufacturers have also hit meters. It is not necessarily a national standard product to beat rice, but the national standard generally does not beat rice. Non-standard beat rice is only a means, generally the length of the national standard line is 100 meters. In addition, a micrometer is used to measure the diameter of the wire. Now, the minimum indoor wire size is 2.5 square feet.

5, see the quality of copper

Generally, the higher the brightness of copper is, the better the quality is, and the luminosity is uniform, shiny and has no sense of layering. The copper core of the qualified copper core wire should be purple, shiny and soft to the touch. When we look at it, we can cut off a small section of plastic skin, carefully look inside the copper wire, and touch the tip of the copper wire with the palm, feeling flat and without tingling. The softer touch is the national standard product. The shoddy copper core copper core is purple-black, yellowish or white, impurities, mechanical strength is poor, toughness is not good, it will be broken with a little force, and often within the wire disconnection phenomenon.