First look at packaging: national standard often do good quality, take up texture. Poor quality packaging is rough and irregular.
Second look at the core: the qualified copper core should be purple, glossy and soft. Bad copper core is purpleblack, impurities, poor strength, toughness is not good, a little effort will break, there are many wire breakage phenomenon. In addition, poor quality power lines look very thick, in fact, most of them are made of recycled plastics, which will leak electricity due to aging for a long time.
Third look at the length: the state does not have to be forced to beat rice, but many manufacturers also beat rice, beating rice is not necessarily the national standard, but the general national standard does not beat rice. Non standard beating rice is only a means.
Fourth look at the logo: regular power line will have certain logo, the maximum will not exceed 500 mm will have the next identical logo typed out, above the general product trademark, manufacturer name, implementation standards, etc.
Fifth look at the factory: the qualified power lines are clearly marked. Most of the fake and inferior power lines are "three without products", while some are labeled as manufactured in a province or a city in China, which is actually not labeled as origin.
Sixth, see certificate: regular production of power lines have a clear quality system certificate, certificate specifications, trademarks, specifications, voltage and other clear information.
Seventh Look at the price: Because of the low production cost of inferior wires, when they are sold, they are often sold under the guise of good quality and low price, which makes people fall for it.