This category includes power multi-core cables for various purposes. In view of the fact that now there are a huge number of their types, which are produced both by industry and by national standards, in practice only exemplary alphanumeric marking of products is used. Simply put, the technical designation of cables with certain parameters is accepted, for the production of which the materials of the corresponding GOSTs are used.
What is the standard cable design? This is one or, more often, several isolated veins, which are enclosed in a hermetic shell. It can be aluminum, lead, rubber or plastic. Sometimes, depending on the conditions of use, the product is covered with an armored layer of steel tapes or wire of different cross-section.
Currently, there are several types of cables that are distinguished by application. Power - used in the construction of lines, the main purpose of which transmission, as well as distribution
As insulation, paper, polyethylene, PVC, rubber and other materials are used. The armored cover is made of lead, aluminum, rubber or plastic. Control cables - used for supplying low-voltage signals to various electrical devices and creating special control circuits. They are equipped with copper or aluminum conductors of cross-section up to 10 mm2.
Automated control systems usually use products with copper conductors in a plastic sheath, with a shielded coating that protects them from electromagnetic interference. The weight of the copper cable depends on the number of cores, as well as their cross-sections.
The special cables with which the signals are transmitted are widely used in communications. This type is divided into high-frequency long-distance cables and low-frequency cables for local use in local lines.
Communication between radio engineering devices is carried out using coaxial cables with a central copper wire covered with PTFE or polyethylene. The upper insulating layer is made of the same materials.
operation. In more detail, we will focus on power products and their applications, for which the resistivity of a copper cable is considered optimal, since this index is mainly dependent on the material and operating temperature. According to the instructions of the regulatory authorities, it is recommended to use multi-strand copper cables as wiring in residential and industrial buildings.
The greatest demand for builders are products of the brand ВВГ.This type of wiring is a product with double PVC insulation. Depending on the overall section, it can be used in places where the load on the copper cable is from 0.6 to 6 kV.By the way, you can check the resistance of a copper cable at home using the SmartClass ADSL, which is designed to measure various wiring parameters.
Also very popular is the copper cable with rubber insulation type KG.Due to the presence of a multitude of copper wires, it has excellent flexibility. To use this type of wiring in permafrost conditions, special additives have been introduced into the insulation of the KG.
And completes the list of armored cable ВБбШв, equipped with double PVC insulation and protected by two layers of metal tape. This type is mainly used for routes laid in the ground, in tunnels and in air. Thanks to graphite chips, which is part of the insulation, it is sufficiently resistant to fire.