When selecting cables, you should choose them based on your own site usage and not be greedy for cheap prices.

I think this type of cable is very cheap and can guarantee that it is a national standard. It is used to fool unprofessional and industry savvy users who play sidekicks. In order to help users better understand the quality standards of cables and wires and the differences between national standards and non-standard standards, let's combine the practical situations that engineering users and cable television industry often encounter to have a simple understanding.

There are generally three types of cables used by engineering users and construction projects:

One national standard cable: The cable produced according to relevant national cable standards and technologies is abbreviated as international cable.

2 line standard cables: According to industry standards, there are fewer cables that cut corners, but do not affect performance.

III. Non standard cables: products born to meet market demand. Currently, the application of wires and cables is becoming increasingly widespread, and there are more and more types of wires and cables in the market.

So, how can we distinguish between "national standard" and "non-standard" wires and cables?

I suggest you take a look, try it twice, weigh it three, compare prices four, inspect copper five, inspect six, and recruit six.

Take a look: It depends on whether the wire and cable products have quality system certification, whether the certification is standardized, whether there is a factory name, address, inspection seal, production date, whether there is a trademark, specification, voltage, etc. printed on the wire, and whether the copper color on the cross-section of the copper core is bright and soft, otherwise it is considered inferior.

Second attempt: You can repeatedly bend the wire head with your hand. Soft hands, good fatigue resistance, great flexibility of plastic or rubber hands, and no cracks on wire insulators are excellent products.

Triple scale: A high-quality wire and cable, with a weight of 1.8-1.9kg per 100m, typically within the specified weight range. For example, a regular plastic insulated single stranded copper core wire with a cross-sectional area of 1.5mm2; Plastic insulated single stranded copper core wire with a cross-sectional area of 2.5mm2 weighs 3-3.1kg per 100m; Plastic insulated single stranded copper core wire with a cross-sectional area of 4.0mm2, weighing 4.4-4.6kg per 100m, etc. Poor quality wires with insufficient weight, length, or copper core impurities. If it is a cable, especially a large cable, the soil weighing method reflects whether the copper content of the cable meets the standard and whether the conductor cross-section meets the standard.

The simplest method is to steal copper to make small cross-section cables. If the copper content of the cable cannot reach the weight range of allowable errors specified by the state after weighing, it can basically be considered non-standard.

Four price comparisons: Due to the lower production cost of counterfeit and inferior wires, vendors often sell them at low prices under the guise of being cheap and high-quality, leading people to fall into a trap. Therefore, when making a purchase, be careful not to be fooled by the merchants' promotion of "high-quality and affordable". 5. Qualified copper core wires should be purple red, shiny, and soft.

5. Copper material: The copper core of a fake copper core wire is purple black, yellow or white, with many impurities and poor mechanical strength and toughness. If you use a little force, it will break, and the wire often breaks. During the inspection process, simply peel off one end of the wire and gently rub the copper core with a piece of white paper. If there is black material on the white paper, it indicates that there are many impurities in the copper core and can be considered as "non-standard" wires and cables.

6. Quality inspection: When there are differences in cable quality, they can be sent to a third-party inspection agency for inspection. Whether it is qualified according to authoritative testing reports.