Currently, it is impossible to imagine the construction and industrial production without using different types of cables. For this reason there is quite a large number of cable products, differing in their application, structure and technical characteristics. Therefore, the main varieties of cables and their features should be considered in more detail.
As the first type of cables should be considered signal-blocking cables. This category includes products with current carrying cores made of copper and placed in polyethylene insulation and plastic jacket. The main area of use of such cables is electrical installations of railway signaling, interlocking and locking at nominal AC voltage of 380 V or DC voltage of 700 V.
Power cables are used for transmission and distribution of electrical energy in fixed installations. This type of cable which price is rather low, is very common. It is made of aluminum or copper wire. Paper tape impregnated with oil is used as insulation material. Operating voltage range for this type of cables is from 600 to 500 kV.
Control cables have copper or aluminum conductors with plastic insulation. They are mainly used for switching of electrical appliances, equipment and devices, for which the nominal voltage up to 660 V and a frequency of up to 100 Hz.
Communication cables have several subspecies. These include telephone cables and radio frequency cables. Telephone cables are cables that are used for laying the stationary telephone subscriber networks.
Radiofrequency cables are intended for switching of various radio devices and radiofrequency systems. They also come in several types: RF coaxial cables and RF symmetrical cables, which can be double-core or consist of two coaxial pairs.
The last type includes control cables, which are products with conducting cores made of copper with plastic or rubber insulation. Their main fields of application are control, information and monitoring circuits of various electrical installations with a rated alternating voltage of up to 1000 V.
