How to distinguish the advantages and disadvantages of wire and cable
Wire and cable, as the main carrier of power transmission, are widely used in electrical equipment, lighting circuits, and household appliances. The quality of the wire and cable directly affects the quality of the project and the safety of consumers' lives and property. There are many kinds of wires in the market, and appropriate wires should be used according to their own power load.
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Some of the wires sold on the market are more expensive and some are more expensive, and some people tend to be cheaper first. However, cheap wires often have a lot of performance that he can not achieve, and they may bring their own. Many security risks. The technological content of wire production is not too high, and there is not much difference in raw materials. If there is too much cheap, it is either cutting corners or not giving enough. How do you sign it? I'll give you a few ways to do it more easily:
1, look to see the packaging, the national standard of the wire is often done better, neat, with a sense of quality in hand.
2, to open the packaging to look inside the wire, the national standard wire 1.5 "" -6 square wire requirements is the thickness of the skin (insulation thickness) is 0.7mm, is too thick is non-standard, and corresponding to his inner core Certainly not enough, the line skin you can force to pull it, not easily torn is the general is the national standard 3, with a fire, after leaving the 5s extinguished, there is a certain flame-retardant function for the national standard line.
4, to see the inner core, the core material (copper) The higher the brightness, the better the copper, and the photometric, shiny, no sense of layering. The national standard requires that the inner core must use oxygen-free copper. Non-standard, such as black rods, may have hidden accidents.
5. The thickness of the inner core has certain requirements, but it is not very strict. However, it can't be a lot wrong, but it's only a small bit of error that is generally not visible to the eye.
6, length, the country does not have to force the meter must be beaten, but there are many manufacturers also hit the rice, hit the rice is not necessarily the national standard, but the general national standard is generally not beat rice. Non-standard beat meters is just a means.
7. National regulations must have a certain mark on the wire, the largest will not exceed 500mm will have the same next mark out, above the general product trademark, manufacturer name, implementation standards.