How to choose VVGng cable

The VVGng cable is in great demand among installation organizations for laying utility networks in residential, office and industrial premises. The presence of PVC insulation in the cable construction makes it attractive for safety reasons. The protective shell does not contribute to the combustion process, which is important for use in places where there is a high risk of fire.

In this article, we will analyze how to choose a VVGng cable among a large number of products offered by different manufacturers.

Scope of application

These cable products are designed to transmit electrical energy from the producer to the consumer. It is used in both AC and DC networks. Laying a cable line:

• for building structures, cable structures and pipes;

• in metallic and non-metallic cable sheaths in all types of premises and outdoor installations;

• at any height in an open space;

• in dry and wet rooms;

• in production premises, open and hidden in the walls, subject to safety; • in places subject to vibration.

Laying cable lines nearby has no contraindications, since the brand does not contribute to the spread of fire.

Marking VVGng

The elementary concept of decoding the designation will provide information about the presence of protective shells and their composition, as well as about the metal used as a conductor of energy.

• B — wire insulation made of PVC plastic mixture that does not support combustion processes;

• B — cable sheath made of PVC plastic mixture that does not support combustion processes;

• D — lack of a protective layer, i.e. "naked";

• ng — designation of a plastic compound with reduced fire hazard when applied in groups.

Cable construction

1. The cable consists of a main conductor which is made of copper and has a round or sector shape. The core can be either single-wire - in the form of a single piece, or multi-wire - in the form of a bundle of wires with a smaller cross-section twisted into a single bundle.

2. The conductive part of the cable is covered with a layer of PVC-combined insulating material. Color coding is applied to the insulation depending on the number of live conductors. The colors can be solid or in the form of a longitudinal band with a minimum width of 1 mm. The insulating material does not spread fire during a fire.

3. Cavities obtained in a cable with three or more conductors are filled with the same material as the insulation. This helps reduce the risk of fire.

4. The cable is finished with the presence of a sheath of PVC compound, which has properties of low flammability.

Technical specifications

The cable is designed to operate at a nominal voltage of 0.66 / 1 kV.

Operation at ambient temperatures from -50°C to 50°C.

The minimum temperature for installation work without preheating is -15 ° C.

The permissible bending radius is 10 external diameters for single-core cables and 7.5 diameters for multi-core cables.

Laying is allowed without limiting the difference in levels.

The heating of the cable depends on the operating mode:

• in normal mode — long time of operation + 70 ° C;

• in case of accidents and short-term overloads — short time of operation + 90 ° C;

• at short circuit + 160 ° C;

• the temperature should not exceed + 350 ° C to avoid igniting the line in the event of a short circuit.

The nominal service life of the cable line is designed for 30 years, this is achieved by observing all the rules for storage, transportation, laying and further operation.

Advantages and disadvantages

Let's look at the main advantages:

• A wide range of applications (for example, enterprises that use combustible components, wooden houses, etc.) due to the increased safety threshold.

• Increased current loads.

• Wide application temperature range.

• Possibility of use both indoors and outdoors, subject to the rules of laying.

• Different variations of the permissible cross-sections (1.5-1000) and combinations of the number of cores (1-5), covering the need to apply technical specifications.

• Low cost available for installers and other users.

Since the cable is not a self-supporting structure, when laying in open areas, provide additional protection against sunlight or precipitation. Safety is achieved through the use of closed cable ducts, tubes or UV-resistant tape.

It's worth paying attention to

When choosing this VVGng cable for work, you should pay attention to the compliance of the product used with the requirements of GOST 31996-2012, which strictly regulates the characteristics of the output product.

If the product meets the state standard, then do not hesitate to choose a cable, because it is made according to technology that guarantees reliability and safety in operation.

Today, many companies produce cables according to their specifications (technical specifications). The technical specifications used may change the composition of the insulation or casings of the output product in some detail; other changes are also possible that are not immediately noticeable. With all this, the cable comes with the same marking.

If there are only TUs, you should compare them with the existing industrial technical specifications TU 16-705.499-2010. The parameters provided in these TU fully match the requirements of the relevant state standard given above.

Cable products manufactured according to relevant industrial specifications or other technical specifications and their technology is similar to GOST or industrial specifications can be safely purchased without fear of quality and safety.

Where and how to buy?

To buy a really high quality and reliable VVGng cable, you should go to the following link -. In the relevant sections you will find the necessary version at quite democratic and low prices.

The Iks Cable online store sells products only from those factories whose products have been tested for years, and the quality meets all the necessary standards.