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What Kinds Of Wire And Cable Are There
Oct 18, 2018

1.Bare copper wire
      Bare wire and bare conductor products refer to no insulation, no sheath of conductive wire, mainly including bare single wire, bare stranded wire and profiles of three series of products. Copper aluminum single line: including soft copper single wire, hard copper single wire, soft aluminum single wire and hard aluminum single wire. It is mainly used for semi-finished products of various wires and cables, and is used for the manufacture of telecommunication wires and motor electrical appliances. Bare stranded wire: including hard copper stranded wire (TJ), hard aluminum stranded wire (LJ), aluminum alloy stranded wire (LHAJ), steel-cored aluminum stranded wire (LGJ) is mainly used for electrical equipment and electronic appliances or components, the specifications of the above stranded wire range from 1.0 to 300mm2.
2.Power cables
      Power cables are used to transmit and distribute high-power electrical energy in the backbone lines of power systems, including power cables with various voltage levels ranging from 1 KV to 330 KV and above and with various insulation. The section is divided into 1.5, 2.5, 4, 6, 10, 16, 25, 35, 50, 70, 95, 120, 150, 185, 240, 300, 400, 500, 630, 800 mm 2 with 1, 2, 3, 4, 5, 3 + 1, 3 + 2 cores. The power cables are divided into low voltage cables, medium voltage cables and high voltage cables according to their voltage levels. It is divided into plastic insulated cables, rubber insulated cables and mineral insulated cables according to insulation conditions.
3.Overhead insulated cable
      We are also very familiar with overhead cables, which are characterized by no sheath. Many people have three misconceptions about this kind of cable, which is corrected here. First, its conductor is not only aluminum, but also copper conductor (JKYJ, JKV) and aluminum alloy (JKLHYJ). There are also steel cored aluminum stranded cables (JKLGY). Secondly, it is not only single-core, the common are single-core, but it can also be several conductors stranded bundle. Third, the voltage level of overhead cables is 35KV and below, not 1KV and 10KV two.
4.Control cable
      This kind of cable is similar to power cable in structure. It has only copper core, no aluminum core cable, small conductor section and more cores, such as 24 * 1.5, 30 * 2.5... It is suitable for AC rated voltage 450/750V and below, power stations, substations, mines, petrochemical enterprises and other single-machine control or unit equipment control. In order to improve the ability of controlling signal cables against internal and external interference, shielding measures are mainly adopted.
      The common models are KVV, KYJV, KYJV22, KVV22 and KVVP. Type meaning: "K" control cable, "V" PVC insulation, "YJ" XLPE insulation, "V" PVC sheath, "P" copper wire shield. For the shielding layer, our common KVVP is copper wire shielding, if it is copper strip shielding, that is, KVVP2, if it is aluminum-plastic composite strip shielding, that is, KVVP3. The shielding layers of different materials have their own characteristics and functions. In future articles, we will discuss this topic in detail. Mainly used for household and distribution cabinets, open hardware store friends are most familiar with, often said that the BV line belongs to the wiring. Model BV, BLV, BVR, RVV, RVVP, BVVB and so on. For this "B", big cake want to talk a few words, in the model of wire and cable, often see this B, different places, the meaning of the representative is different.
      In the case of BVVB, the first B is the wiring, which means the application of the cable classification, just like JK for overhead cables, K for control cables. The flat type represented by B at the end is the additional special requirement for the cable. The meaning of BVVB is copper core PVC insulated PVC sheathed flat cable.
5.Special cable
      Special cables are cable with special functions, mainly including flame retardant cable (ZR), low smoke halogen-free cable (WDZ), refractory cable (NH), explosion-proof cable (FB), rat-proof cable termite-proof cable (FS), water-proof cable (ZS). Flame retardant cable (ZR), low smoke halogen-free cable (WDZ): mainly suitable for important power and control systems. When the line is in case of fire, the cable can only be limited combustion under the action of external flame, less smoke, smoke harmful gases (halogen) are also very few.
      When the external flame disappears, the cable can also extinguish itself, so that the fire damage to human body and property can be minimized. Therefore, this kind of cable is widely used in petrochemical, electric power, metallurgy, high-rise buildings and densely populated places. Fire resistant cable (NH): it is mainly used for special power and control systems. When the line is in case of fire, the refractory cable can withstand 750 ~ 800 C high temperature for more than 90 minutes to ensure the safe transmission of electricity to win sufficient time for fire fighting and disaster reduction. New products such as refractory cables, flame-retardant cables, low smoke halogen-free/low smoke halogen-free cables, termite/rat-proof cables, oil/cold/temperature/abrasion-proof cables, irradiation crosslinked cables, etc.

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