Classification and Application of Wires and Cables

The wire and cable industry is an important supporting industry for my country’s economic construction. Currently, my country’s wire and cable industry has achieved an annual output value of over one trillion yuan. The wire and cable industry ranks first in the world in terms of scale and cable production and sales. So what are the classification and applications of wires and cables?

1. What types of commonly used wires and cables are classified according to their uses? Answer: According to use, it can be divided into bare wires, insulated wires, heat-resistant wires, shielded wires, power cables, control cables, communication cables, radio frequency cables, etc.
2. What types of insulated wires are there? Answer: Commonly used insulated wires include the following: PVC insulated wires, PVC insulated flexible wires, nitrile-PVC mixture insulated flexible wires, rubber insulated wires, agricultural underground directly buried aluminum core plastic insulated wires, rubber insulated cotton yarn Textile cords, PVC insulated nylon sheathed wires, PVC insulated cords for power and lighting, etc.
3. What kind of occasions is the cable tray suitable for? Answer: Cable bridges are suitable for overhead laying of power cables and control cables indoors and outdoors in general industrial and mining enterprises, and can also be used for indoor and outdoor erection in telecommunications, radio and television and other departments.
4. What are the cable accessories? Answer: Commonly used electrical accessories include cable terminal junction boxes, cable intermediate junction boxes, connecting pipes and terminal blocks, steel plate junction troughs, cable trays, etc.
5. What is a cable intermediate joint? Answer: The device that connects the conductors, insulation shields and protective layers of cables to connect cable lines is called a cable intermediate joint.

Wire and cable applications

1. Power system

The wire and cable products used in the power system mainly include overhead bare wires, busbars (busbars), power cables (plastic cables, oil-paper power cables (basically replaced by plastic power cables), rubber sheathed cables, overhead insulated cables), branch cables (replacing some busbars), electromagnetic wires, and electrical equipment wires and cables for power equipment, etc.

2. Information transmission system

The wires and cables used in information transmission systems mainly include local telephone cables, television cables, electronic cables, radio frequency cables, optical fiber cables, data cables, electromagnetic wires, power communication or other composite cables, etc.

3. Mechanical equipment, instrumentation systems

In addition to overhead bare wires, almost all other products in this section are applied, but mainly power cables, electromagnetic wires, data cables, instrumentation cables, etc.

Wire and cable products are mainly divided into five categories

1. Bare wires and bare conductor products

The main characteristics of this type of product are: pure conductor metal, without insulation and sheath layers, such as steel core aluminum stranded wire, copper aluminum busbar, electric locomotive wire, etc.; the processing technology is mainly pressure processing, such as smelting, rolling, drawing system, stranding/compression stranding, etc.; the products are mainly used in suburban areas, rural areas, user main lines, switch cabinets, etc.

2. Power cable

The main features of this type of product are: extruding (winding) the insulation layer on the conductor, such as overhead insulated cables, or twisting several cores (corresponding to the phase line, neutral line and ground wire of the power system), such as overhead insulated cables with more than two cores , or add a sheath layer, such as plastic/rubber sheathed wire and cable. The main process technologies include drawing, stranding, insulation extrusion (wrapping), cabling, armoring, sheath extrusion, etc. There are certain differences in the different process combinations of various products.The products are mainly used in the transmission of high-voltage electric energy in generation, distribution, transmission, transformation and power supply lines, with large currents (tens of amperes to thousands of amperes) and high voltages (220V to 500kV and above).

3. Wires and cables for electrical equipment

The main features of this type of products are: a wide range of varieties and specifications, a wide range of applications, most of the operating voltages are 1kV and below, and new products are constantly derived for special occasions, such as fire-resistant cables, flame-retardant cables, low-smoke halogen-free/low-smoke Smoke-resistant low-halogen cables, termite-proof, mouse-proof cables, oil-resistant/cold-resistant/temperature-resistant/wear-resistant cables, medical/agricultural/mining cables, thin-walled wires, etc.

4. Communication cables and optical fibers (brief introduction)

With the rapid development of the communications industry in the past two decades, products have also developed at an alarming rate. From the simple telephone and telegraph cables in the past, it has developed into thousands of pairs of voice cables, coaxial cables, optical cables, data cables, and even combination communication cables.The structural dimensions of such products are usually small and uniform, and require high manufacturing precision.

5. Electromagnetic wire (winding wire)

Mainly used in various motors, instruments, etc.

Derivatives/new products of wires and cables

Derivatives/new products of wires and cables are mainly due to different application situations, application requirements, convenience of equipment, and reduction of equipment costs. New materials, special materials, or product structures are changed, or process requirements are improved, or different A variety of products are produced by combining them.