1. What kinds of wires and cables are commonly used according to their uses? Answer: it can be divided into bare wire, insulated wire, heat-resistant wire, shielded wire, power cable, control cable, communication cable, radio frequency cable, etc. according to the purpose.

2. What are the types of insulated wires? Answer: there are several kinds of insulated wires: PVC insulated wire, PVC insulated flexible wire, NBR PVC compound insulated flexible wire, rubber insulated wire, agricultural underground buried aluminum core plastic insulated wire, rubber insulated cotton yarn textile flexible wire, PVC insulated nylon sheathed wire, PVC insulated flexible wire for power and lighting, etc.

3. Where is the cable bridge suitable for? Answer: cable bridge is suitable for overhead laying of power cable and control cable indoor and outdoor in general industrial and mining enterprises. It can also be used for indoor and outdoor erection of telecommunication, radio and television and other departments.

4. What are the cable accessories? A: common electrical accessories include cable terminal junction box, cable intermediate junction box, connecting pipe and terminal, steel plate wiring slot, cable bridge, etc.

5. What is cable intermediate joint? Answer: the device that connects the conductor, insulating shield and protective layer of cable and cable to connect the cable line is called cable intermediate joint.

Wire and cable application

1. Power system

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

2. Information transmission system

Wires and cables used in information transmission system mainly include local telephone cables, TV cables, electronic cables, radio frequency cables, optical fiber cables, data cables, electromagnetic wires, power communication cables or other composite cables.

3. Mechanical equipment, instrument and instrument system

In addition to overhead bare wires, almost all other products have applications, but mainly power cables, electromagnetic wires, data cables, instrument cables, etc.

Wire and cable products are mainly divided into five categories

1. Bare wire and bare conductor products

The main features of this kind of products are: pure conductor metal, without insulation and sheath, such as steel core aluminum strand, copper aluminum bus bar, electric locomotive line, etc.; the processing technology is mainly pressure processing, such as smelting, rolling, drawing, stranding / tight stranding, etc.; the products are mainly used in suburbs, rural areas, main lines of users, switch cabinets, etc.

2. Power cable

The main features of this kind of products are: extruding (winding) the insulating layer outside the conductor, such as overhead insulated cable, or several cores of stranded (corresponding to the phase line, zero line and ground wire of the power system), such as more than two cores of overhead insulated cable, or adding the sheath layer, such as plastic / rubber sheathed wire and cable. The main processing technologies include drawing, stranding, insulation extrusion (wrapping), cabling, armor, sheath extrusion, etc. different process combinations of various products have certain differences.

The products are mainly used for the transmission of strong electric energy in the transmission, distribution, transmission, transformation and power supply lines, with large current (tens of a to thousands of a) and high voltage (220 V to 500 kV and above).

3. Wires and cables for electrical equipment

The main features of this kind of products are: a wide range of varieties and specifications, a wide range of applications, and a large number of voltages up to 1KV. In the face of special occasions, new products are constantly derived, such as fire-resistant cables, flame-retardant cables, low smoke, halogen-free / low smoke, low halogen cables, termite resistant, mouse resistant cables, oil / cold / temperature / wear-resistant cables, medical / agricultural / mining cables, thin-wall wires, etc.

4. Communication cable and optical fiber (brief introduction)

With the rapid development of communication industry in the past 20 years, the products also have an amazing development speed. From the simple telephone and telegraph cables in the past to thousands of pairs of telephone cables, coaxial cables, optical cables, data cables, and even combined communication cables.

This kind of products are usually small and uniform in structure size and high in manufacturing accuracy.

5. Electromagnetic wire (winding wire

It is mainly used for various motors, instruments, etc.

Derivatives / new products of wires and cables

The derivative / new products of wires and cables are mainly produced by adopting new materials, special materials, changing product structure, improving process requirements or combining different kinds of products due to different application occasions, application requirements, convenience of equipment and requirements of reducing equipment cost.

Adopt different materials such as flame-retardant cable, LSZH / LSZH cable, termite proof cable, mouse proof cable, oil / cold / temperature resistant cable, etc.

Change the product structure, such as: fire resistant cable, etc.

Improve the process requirements, such as: medical cable, etc.

Combined products such as OPGW, etc.

It is convenient to install and reduce equipment cost, such as prefabricated branch cable.