Although the field of wire and cable is only a field of supporting facilities, it has many varieties of products and is widely used, involving power engineering, engineering construction, communications, manufacturing and other fields, and is closely related to every sector of the social economy. Cable and wire is also known as the "aorta" and "nervous system" of the social economy, is the transport of electromagnetic energy, information transmission and production of a variety of motors, instruments and equipment, instrument panels, to complete the basic equipment of electromagnetic induction heat transfer can not be lacking, is the basic commodity necessary for the future of electrical and information management of social development. Below Qingdao cable for us to tease out some of the basic knowledge of cable wire!

01

In the national standard, the cable lines beginning with the general B English letter such as BV, BVV, BVR are all cloth cable lines, and according to the name, the fixed cable lines can be called cloth cable lines. In theory, the cable cable is only a typical name, and it is not necessary to say what kind of cable is a cable cable, most of which refers to the fixed cable cable inside the building (including but not limited to cable lines, communication networks, cable digital television, optical fiber lines, etc.).

02

According to the type specifications of the cable, you can probably understand the material of the power line, the insulation layer or the raw material of the wire jacket: take the BV line as an example, the English letter B is the pinyin general name of the wire. The letter V is for the outer layer of plastic material. V, is the general name of polyethylene PVC. The outer layer of plastic, can be called insulation layer, can also be called wire sheath, if it is BVV, it indicates that there is a double layer of wire sheath. In this regard, the number of copper is T, which is generally omitted and not written. If it is an aluminum transmission line, L is not omitted.

03

The cross-sectional area of the cable cable: take BV2.5 square meters as an example, 2.5 square meters is the cross-sectional area, and the enterprise is square millimeters. Usually how many square lines are said, that is, the cross-sectional area. If you know the cross-sectional area, you know the diameter of the core. It should be noted that many people will use the cross-sectional area as a standard to distinguish the cable carrying capacity, which is actually very unreasonable, and now there are 70~80% cable lines on the market are not in line with the provisions of the non-standard cable lines, commonly used copper quality is poor, such cable lines even if the line can be, the resistor is still relatively large, Cable carrying capacity is also not qualified, and professional high-quality cables are usually 99.99% oxygen-free copper, so both online or cable carrying capacity and other levels can be well qualified, which is the national standard cable line should look like.

04

Specifications and models of wire and cable: with the buried foiled cable, cable can give a specific example, such as VV3*50, it means that the meaning is, copper core, PVC insulation layer, PVC sheath, 3 50 square meters of wire and cable. Common plastics, in addition to PVC, can also add some weather resistance, fire prevention, flame retardant and other related raw materials. Sometimes, see VV22 or VV23, such as the indication, 22 indicates that double steel wrapped armored cable PVC jacket,23 means double steel wrapped armored cable high voltage polyethylene jacket, this number is the relevant standard specifications.

05

Flame retardant grade: For example, 0.6/1KV of the cable line, or 8.7/15KV of the high voltage cable line, that is, it is suitable for fixed laying on the rated current 1KV and 15KV and the following transmission and transformation routes.

06

Other model specifications: Steel wire, for pulling poles. High-voltage cable, the general installation engineering company often touch, in some areas, generally from the high-voltage wire to the transformer that section, the length is basically fixed. Buried line double eyelid NLVV for agricultural land, the impact toughness is extremely low, and it is now slowly phased out. The high pressure overhead cable with insulation layer, the steel core inside, in addition to the effect of fixing firmly, should also have the elements of skin effect. Frequency conversion cables, control cables and wire cables, etc., their specifications, models and production processes are basically similar.

07

Bending radius: Cable has a bending radius, so different sizes of cable products, the diameter of the cable tray is not the same, cable laying less bending radius (D is the diameter of the cable) : single-core cable is 20D, multi-core cable is 15D, single-core cable is 15D, multi-core cable is 12D.

Finally, remind us that when buying wire and cable, we must choose a reliable manufacturer, check the clear quality, and do not have to buy some non-standard cable lines due to low prices.

Qingdao Tianxing Cable Co., Ltd. focuses on the production of customized wire and cable manufacturers, main: fire wire and cable, power cable, control cable and other products, exported to more than 40 countries and regions around the world, the annual production capacity of 1 billion yuan. 6000 square meters of storage, standing hundreds of millions of inventory, order demand for rapid distribution and delivery, large prices more favorable. Hotline: 16678668098