Technical characteristics of cable ВВГнг

What does the marking mean?

First of all, it is necessary to provide for your attention the decoding of the conductor marking.

Photo of the appearance of the cable

So, the acronym gives us to understand the following characteristics:

• "A" in the beginning is missing, which means that the veins are copper;
• the first "B" is a material for insulation of cores, in this case PVC( polyvinylchloride);
• second "B" - the material of the outer shell, which in this case is, again, PVC;
• "D" - gives us to understand that there is no additional protection of the conductor;
• prefix "ng" means that the cable is not burning.

It should also be noted that there are modern modifications of this conductor with "ng-LS" prefixes - denotes reduced smoke and gas emission, "ng-HF" - does not release corrosive gaseous products during combustion. In turn, these two modifications have their own improvement - fire resistance, the designation of which is the code "FR".As a result, the product may have the following marking - "ВВГнг-FRLS", which will not be difficult to decipher.

guide We recommend that you read more about decoding the marking of wires and cables!

Difference from the basic version of

Very often, electricians-beginners are wondering what is the difference between VVGng and VVGng-LS and the traditional variant - VVG.

Based on the above labeling, you can easily answer this question, namely:

1. BBG - does not have any flame retardant and self-extinguishing properties, conventional PVC insulation.
2. ВВГнг - the insulating layer contains halogen chemical elements, the purpose of which is an obstacle to the combustion process.
3. ВВГнг-LS - when creating the sheath of live conductors, halogen-free polyvinyl chloride is used, which practically does not emit smoke during combustion.

For domestic use, and especially if you decide to install electrical wiring in a wooden house, be sure to purchase the last option, as the safest.

Main characteristics of

So, let us pass to the most interesting important part of the article - a review of the technical characteristics of the cable VVGng.

Construction

The conductor can consist of either one or several cores, up to five. In the abbreviation, the number of veins can be determined from the first digit. In turn, veins can have both a circular and a sector shape( a visual difference of the two kinds in the picture).

Another feature of live conductors, they can be multiwire or single-wire, class 1 and 2 in accordance with GOST 22483. The color marking of the wires can be represented by complete staining of the insulation or partial - a strip 1 mm wide along the conductor. The colors of the wires of the wires of VVGng cable correspond to all modern standards. If the cable is stranded, the grounding contact may have a smaller cross section than all the others.

Weight

As for the weight of the cable VVGng, it differs depending on the overall cross-section. Varies the mass of 1 km of cable from 28.5 to 10256 kg.

You can see the description of all the weight values ​​in the table below:

Cross-section

The outer diameter of the cores, and it is more correct to say the cross-section of the cable VVGng can be from 1.5 to 240 mm2.All the existing sizes and nomenclature are provided in the table:

In the apartment and at home, the following dimensions of the VVGGG cable are most often used:

• For outlets - at least 2.5 mm2
• For lighting not less than 1.5 mm2
• For connection of a powerful householdequipment separately from the junction box - not less than 4 mm2.

For correct diameter selection, it is recommended to calculate the cable cross-section for power and current. The formulas are fairly simple and thus the calculated work will not take you more than 5 minutes.

Technical and operational parameters of

The main parameters of the VVGG power cable are:

• rated( working) voltage 660V and 1000V;
• frequency of 50 Hz;
• long-term permissible temperature, up to which the veins can be heated during operation - not higher than 70оC.In this case, for not more than 4 seconds, the cores can be heated up to 250 ° C( for example, with a short circuit).Combustion occurs at temperatures above 400 ° C;
• the operating temperature of the VVGGG cable can vary from -50 to +50 ° C, even though the air humidity does not exceed 98%;
• laying conditions at an ambient temperature of at least -15 ° C;
• work in emergency mode no more than 8 hours a day, while for the entire period of use no more than 1000 hours;
• building length: 450 m with a cross section of 16 mm2, 300 m at 25-70 mm2 and 200 m if the product with a diameter of 95 mm2 or more;
• , the smallest permissible bending radius is 7.5 times the overall cross-sectional area for a single-core conductor and 10 sizes for stranded;
• electrical insulation resistance of 12 MΩ / km at a temperature of 20 ° C and a cross-section of 1.5 mm2.With a diameter of 4-5 mm2, the resistance is 10 MΩ / km, at 6-9 mm2 - 9 MΩ / km, and if the cross section is above 10 mm2, the resistance will not exceed 0, 005 MΩ / km;
• service life of the product is 30 years, with a warranty period of up to 5 years, and with improper storage up to two years.

Here, in fact, and all the most important technical characteristics of the VVGGG cable, which you should know about when selecting a conductor for its installation in the house and on the street.

Scope

Based on the above operating conditions and characteristics, it can be seen that the cable can be used in both industrial and domestic needs. As for the latter, it should be once again draw your attention to the fact that this guide is the most optimal option for home electrical wiring.

We recommend using it in the following cases:

• when installing wiring in the bathroom;
• in the cornice of the plasterboard ceiling;
• under the wooden cladding of the walls;
• for outdoor( outdoor) installation.

With regard to the wiring method, it is possible to choose both the hidden and the open laying of the line. In the latter case, it is better to place the conductor in a box-channel or corrugation.

We draw your attention to the fact that it is not recommended to lay the VVGGG cable into the ground,for this it is better to use an armored version, which allows to provide reliable protection from rodents and mechanical damages.

The best manufacturers

Among manufacturers it is very difficult to determine which is better, becauseCounterfeits can be found at every step. We recommend that you give preference, if possible, to such plants to manufacturers of VVGGG cable as Kolchuginsky Zavod, Energokabel, Podolskabel, Sevkabel and Moskabel.

It is better to double-check the products of Oryol cable plant for a lot of negative feedback from customers.very often the marking values ​​do not correspond to reality. To independently verify the quality, it is recommended to read the instructions for determining the cross-section of the cable with your own hands. Finally, I would like to note that it is better to compare prices on the Internet on official websites of the company so as not to run into a counterfeit, which will cost less than the original cost of VVGGG cable.