As the main carrier of power transmission, wire and cable are widely used in electrical equipment, lighting lines, household appliances, etc. The quality of the cable directly affects the quality of the project and the safety of consumers' lives and property. There are many types of wires on the market, and you should use the right wires according to your own load.
Some of the wires sold in the market are cheaper, some people tend to be cheaper first, but cheap wires often have a lot of performance that they can’t achieve, and they may bring them Many security risks. The technical content of the wire is not too high, and the raw materials are not much different. If it is too cheap, it is either cutting corners or not giving enough. How about identifying it? I will tell you a few easy ways to identify:
1, look at the packaging, the national standard wire is often done better, neat, hand up to have a sense of quality.
2, to open the package to see the inside of the wire, the national standard wire 1.5--6 square wire requirements is the thickness of the skin (insulation thickness) is 0.7mm, too thick is non-standard, the corresponding his core is sure Not enough, you can pull hard on the line, it is not easy to tear, it is generally the national standard
3, burn with a fire, extinguished within 5s after leaving, there is a certain flame retardant function for the national standard line.
4, look at the inner core, the material of the inner core (copper), the higher the brightness, the better the copper, and the uniformity of light, luster, no layering. The national standard requires that the inner core must use oxygen-free copper. Non-standard such as black copper, there may be accidents.
5, the core of the country has certain requirements, but not very strict. But it can't be a lot wrong, just a little bit small, generally with the error that the eye can't see.
6, length, the country is not mandatory to play rice, but there are many manufacturers have also played rice, playing rice is not necessarily the national standard, but the general national standard generally does not play rice. Non-standard playing rice is only a means.
7, the state stipulates that the wire must be marked with a certain mark, the maximum will not exceed 500mm will have the next same mark to play out, the above generally have the product's trademark, manufacturer name, implementation standards, etc