1, plastic copper wire,
The letter B stands for the wire for the wiring, the letter V stands for the insulating material PVC, and the 4 for the cross-sectional area of ​​the conductor is 4 mm2, meaning that the PVC insulated wire uses 4 square wires. Commonly used BV lines range in cross-sectional area from 0.5 to 185. The larger the cross-sectional area is, the smaller the resistance of the conductor is, and the larger the allowable current is. Of course, if the use of the environment or other reasons for the higher requirements of the wire, you can also use environmentally friendly wire (insulation material has little effect on the environment), fire-retardant or fire-resistant wire (resistant to 70 degrees to 105 degrees) and so on.
Cable can be wire
Sheathed cable,
The meaning of the letter R is soft, the first letter V represents the insulating material polyvinyl chloride, the second V represents the jacket insulating material is also polyvinyl chloride, 3 represents the conductor core number is 3 cores, and 2.5 represents the single core conductor The area is 2.5 square millimeters, which means a PVC insulated PVC sheathed 3-core 2.5 square flexible cable.
Jacket cable is mainly used in electrical appliances, instruments and electronic equipment as well as power lines, control lines and signal transmission lines. The number of cores is from 2 to 5, and the cross-sectional area of ​​a single core conductor is from 0.12 to 6 and so on.
Second, the common sense of wire purchase
There are many types of wires in the market, and the right wires are purchased according to their own power load. Some of the wires sold on the market are more expensive and some are more expensive. Some people tend to choose cheaper ones first. However, the cheaper wires often fail to achieve the performance they say. If they buy such wires, they may give Bring yourself a lot of security risks. The technical content of wire production is not too high, and there is not much difference in raw materials. If there is too much cheap, not material inferiority, or the cross-sectional area is not enough. So how do you sign it? I will introduce you to several more practical ways to sign up:
1, see the packaging. The wires that are neatly arranged, well-packaged, and the items on the certificate (trademarks, names, addresses, telephones, specifications, cross-sections, inspectors, etc.) are complete and clearly printed are generally wires produced by large manufacturers, most of which are produced by large manufacturers. The relevant national standards are therefore reliable.
2, compare the core. Open the package and simply look inside the core. Compare the cores of the same brand of different brands of wires. If the two types of wires obviously have a skin that is too thick, then the wires of the thick skin are not reliable. Pulling the thread skin hard, it is not easy to tear the ball is generally the national standard.
3, use fire. After the insulating material is ignited, the fire source is removed and extinguished within 5s. It has certain flame-retardant function and should be the national standard line.
4, see the inner core. The material of the inner core (copper) is brighter and softer. The national standard requires that the inner core must use pure copper.
5, see online printing. State regulations must be printed on the line with the relevant logo, such as the product model, unit name, etc., the maximum interval of the logo does not exceed 50 cm, printed clear, well-proportioned spacing should be the manufacturers of the national standard line.
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Recarburizer
Carburant for steelmaking and Carburant For Cast Iron, as well as other additives, are also useful as friction material, such as additives for brake pads. The carburizing agent belongs to the raw materials for adding steelmaking and iron making. High quality carburant is an indispensable auxiliary additive for producing high quality steel.
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