Marking of the cable VVG: decoding. VVG cable: transcript

Electric motors and appliances in private houses and plants are connected to electrical wiring by various types of cable. The type of current in the wiring is variable. Wide-range cable has found wide use. Project organizations most often lay this wire in the specification of projects. Deciphering VVG wires helps manufacturers when selecting the right material. Special designations make it possible to distinguish types of wires. Marking the cable VVG, the decoding of which is applied to isolation, literate electricians will tell everything.

What are the types of cable VVG?

The abbreviation of cable decoding carries information about its manufacture. It informs that it is recommended to connect and in what way to lay, outdoor or underground, where it is allowed to use and what permissible air temperature is recommended.

The sale of materials used in power supply, and a huge range of wires by type of insulation and design, provide the opportunity for the buyer to choose the products that he needs. A novice-electrician and ordinary consumer will be interested to know how many varieties of VVG cables with decoding are available on the sales market.

The protection of the cable against open fire was created by manufacturers of cable products. The fire insulation of VVG is invented and applied. Below is the layout of the modifications:

• ВВГнг;
• ВВГнг FrLs;
• ВВГнг Ls;
• VVGng Hf;
• VVGng FrHf.

Each letter in the marking and name has a decoding, VVGT, VVG ng is not just a set of letters. Therefore, it is necessary to read the notation.

Let's look at the notation

The group gasket is made with the Hg current lead. The output material is VVG Png, the decoding of which indicates that the copper vein has lived. The modification of the VVGGN wire informs us that this type is not afraid of fire.

The name VVGng cable Ls stands for information that during the fire the insulation of the wire allocates a minimum amount of smoke.

Cable VVGng FrLs with open flame does not contribute to the fire. Because of the melting insulation, smoke is minimal.

The next type of product is with the interpretation of VVGng Hf. When it is exposed to heat, for example, during fire and melting of insulation, no gases are present. The wiring does not corrode.

The last type of wire VVGng FrHf has all the best characteristics of the above cables.

Isolation of products

To the insulating material used in the production of cable products, special requirements are imposed, including on the fire service. Material PVC (PVC) conceals one distinctive feature in relation to other polymers used for the manufacture of plastic goods. PVC products do not interact with fire. Due to this property, polyvinyl chloride is used in the manufacture of insulating coatings for cables.

Materials for the manufacture of cables:

1. The main type of insulating materials VVG - two-layer insulating coating. Material of PFC (polyvinylchloride). There is no additional insulation.
2. Insulation of copper veins VVGng cable is made of non-combustible PVC materials.
3. Halogen-free PVC, used as an insulating material for the VVG Ls wire, does not emit smoke when melting. Used for the installation of electrical wiring, in crowded places.
4. The cable routing, where it is possible to ignite it, is carried out from the brand ВВГнг FrLs. The insulation is fireproof and does not emit dangerous smoke. The cable with decoding VVGng FrLs is used for closed and open installation with a high degree of fire danger.

Understand the labeling of the cable. We will become acquainted with VVG-decoding of the wire:

• P - polymer wire insulation.
• B - polyvinyl chloride.
• PV is a group of materials based on polyethylene.

The decoding of the following letter designation allows you to find out the composition of the cable insulation.

• B - PVC outer insulation.
• Шв - protection of cores in the form of a hose.
• П - external polymer insulation.
• Шп - external insulation made of polyethylene hose.

Protection of the VVG cable (decoding below) from the mechanical damage has its designation.

• B - armored cable with hard coating.
• D - the cable is flexible. There is no special protection.
• VVG APG wire a, the decoding of which is presented above and clearly indicates its purpose.

Cable cross-section and its meaning

When installing electrical networks it is important to select the correct section of the current lead. The transmission of electrical current depends directly on the section of the wiring. Engines and appliances connected to the grid consume electricity. Electrical wiring while passing current on it begins to heat up. Heating the wiring with an incorrectly matched conductor cross section can lead to an involuntary fire. Wire cross-section must be taken at thirty percent more. Current losses occur in the cable, which must be anticipated in advance. Having completed the hidden wiring in the house, it is difficult to replenish losses in the future.

Device VVG APG a

The cross-section of this type of cable is from 1.5 to 16 squares. The number of wiring is two or three.

Identification of the symbols of wires:

1. B - veins in insulation made of PVC.
2. In (the second) - PVC-sheath cable.
3. D - no cable protection.
4. П - the arrangement of veins is parallel, flat.
5. Ng - burning of insulation is not supported.

Cable cut VVG-Png A:

• Lived copper round form single-wire first class;
• Insulation material - polyvinyl chloride;
• Colored wiring;
• PVC-sheath, which reduces the properties of combustion.

The main application of this type of cable is in transmission and distribution of AC power at a frequency of 50 Hz, with a power of 0.66-1.0 kV.

Cable VVGozh

A large demand in the sphere of cable production is caused by a cable with a cross section of 3x4 brand ВВГож. The composition of this copper cable includes veins covered with PVC insulation.
Explanation of VVG Auger:

1. B - vinyl insulation.
2. In the (second) - the shell is vinyl.
3. D is naked.
4. Auger - single-wire veins.

Cable construction VVGozh

The conductor conducting current, copper, first or second class GOST 2483. The form of the vein is round or sectoral. Belt insulation made of PVC plasticizer, burning on an open fire insulation is reduced. Twisted conductors of a cable from two, three, four and five veins round the core from PVC. The outer sheath of the cable is made of PVC plasticizer, which does not support combustion.

Cable insulation made of polyvinyl chloride. Cable harnesses of different colors. White or yellow. Blue and green. Black or brown, red and crimson.

Scope of cable VVG Png a

Cable operation is permitted on the ground, in rivers and lakes. It is used at temperatures from -50 ⁰ C to +50 ⁰ C. The height of the gasket above sea level is allowed at an altitude of 4300 meters. You can lay the cable in the ground, water, in the air, that is, on poles and walls of buildings and structures.

All of the above characteristics refer to the cable VVGozh, the decoding of which tells us that a wire made of copper veins with a cross section of 3x4 is made. Use it in the northern regions and in areas with a temperate and tropical climate.

Councils for the construction of electrical networks

Installation of the cable with the decoding of the VVG can be conducted on the walls of buildings and structures. The gasket is carried on poles and pendants on cables. Use of this type of cable is permitted where there is no risk of fire. Pave it better on plastered walls or walls made of plasterboard.

If there is a risk of mechanical damage, the cable must be protected. An excellent protection is the pre-installed steel pipes, in which the wire is wound. The most justified is a gasket in wooden houses. Corrugated hose, protecting the wiring, is widely used in construction. Various cable protection channels are also used. Stacking products with decoding of the VVG cable is not recommended. For this, the use of the VVGGN conductor is preferable. It's designed to be hidden. There are recommendations and regulations, in which the rules of installation work using the cable VVGng are painted.

Rules of outdoor work with cable products

When laying the VVG current conductor in the ground, strict rules must be observed. Cable protection of this type is not available. The use of concrete boxes, cable channels and pipes prevents mechanical damage to the cable. Widely used now is signal protection in return for the red brick used earlier. The protection is made in the form of polymer plates, which have excellent non-eroding characteristics.

Pour a sand pillow into the trench. On it lay the cable, on top of which pour and compact the ground. The thickness of the sand layer should be at least 20 centimeters. After the cable is padded, the protective plates are laid, which are also covered with sand. An alarm tape is placed on top of the sand, warning about the presence of a padded electrical cable.

The installation of an armored cable is the most appropriate solution for earthworks. The cost of its laying is higher than the cost of an VVG cable. The service life is the same, but the guarantee of protection against damage at the armored wire is much higher.

Having become acquainted with this article, a simple buyer, not an expert, will correctly select the necessary cable. Based on the fact that the market today offers a variety of types and types of cable, without certain knowledge in this area to determine the choice can be very difficult. If you still have doubts about the purchase, it is better to consult the seller of the electrical wires. This is very important, because the quality of the wiring depends on the safety of all tenants.