Installation vvg. Outdoor cable: installation features. In a metal pipe

VVG-ng - copper flexible cable in flame retardant polyvinyl chloride insulation. It has both round and flat design, which is convenient for some types of installation. To date, the VVG-ng brand cable is considered the most common cable product for wiring, both in residential and industrial premises.

According to the technical characteristics, the VVG-ng brand cable has different designs of single-core and multi-core cores, and according to GOST, the mass of sections of the conductive core. The VVG-ng cable is designed for an operating alternating voltage of 660V and higher, with a frequency of 50 Hz. The allowable temperature on the conductive core is + 70 ° C, and the operating range is not limited for the territory Russian Federation. Permissible temperature during installation cable VVG-ng not lower than -10 °С.

The bend during installation of the wire should be 10 diameters for single-core cables, and 7.5 diameters for multi-wire cables. The service life of the cable of this brand is more than 30 years.

Types of installation of cable brand VVG-ng

1. Open way:

Based on the technical characteristics of the cable, its open laying on surfaces and structures made of non-combustible or slow-burning materials such as gypsum, concrete, brick, plastered surface, etc. is allowed. Open laying of the cable along suspended structures, such as a cable, etc., is also not excluded. providing a reliable gasket and not giving the opportunity mechanical impact on the cable as sagging and stretching.

If there is a risk of damage to the cable mechanically, a additional protection. Also, additional protection should be used when installing the cable. open way combustible wooden surfaces and installation should be carried out using protection, such as a cable channel, corrugated hose, metal hose, pipes, etc.

2. Cable laying on cable-supporting structures:

Cable-supporting structures include pipes, ducts, etc. This method of installation is more suitable for industrial premises than for residential ones. When laying a cable in production, one should take into account the categorization of the premises in which the cable and cable-supporting structures are being installed, as well as environmental factors.

On cable-supporting structures, it is allowed to lay the VVG-ng cable in a bundle. The number of cables in the bundle is determined by the factors listed above and the technical characteristics of the structures, as well as the rules for the installation of electrical installations.

3. Hidden cable laying VVG-ng:

Hidden is the most common way to install cable in residential areas. The cable is laid in grooves, under plaster, in voids, etc. This method does not have the possibility of mechanical damage, and therefore does not require additional protection. Wall void exceptions wooden houses, in which hidden cable laying in non-combustible materials is allowed, pipes, metal hose, etc. The correct installation of the hidden cable laying VVG-ng is determined by regulatory documents for hidden wiring.

4. Cable laying in the ground:

The VVG-ng cable is not recommended for laying in the ground, since it does not have natural protection against mechanical impact, but it is possible to lay such a cable in the ground with additional protection such as pipes, tunnels, HDPE pipes, etc.

Any of the installation methods must be carried out in accordance with regulatory documents, technical characteristics of electrical equipment, rules for the installation of electrical installations (chapter 2.1 Electrical wiring) with the involvement of qualified personnel with access to this species works.

Cable laying, the price of which is lower than the average market price in Moscow, is one of the specialized services of the ElectroDoca electrical installation organization. If you are interested in cable laying, the price per meter or advice on the installation of a power cable - consult with the specialists of our company, and you will be convinced that it is in ElectroDoca that you are ready to offer you the best value for money, as well as the shortest deadlines for work.

Cable installation: price, list of services.

When laying the cable, the prices depend on the installation method (hidden or external). However, no matter how the cable will be laid, the cost per meter in our company is minimal. Electrical work are carried out in compliance with all the rules of electrical installation and with a guarantee of high aesthetic quality.

We offer clients the following types services:

• Outdoor cable laying in Moscow. The wiring is fastened with staples and staples. Advantage this method— ease of repair of wiring in the event of an emergency. Disadvantage - low aesthetic effect(the cable can be hidden under the baseboard, platbands or baguette, but in some places it will still run along the walls).
• Concealed installation cable. The cable in this case is laid in a specially equipped cutting in the wall (strobe). The advantages of the method are safety (you should not be afraid that a child or a pet will reach the cable) and a high aesthetic effect. The disadvantage is that the cost of installing the cable in a hidden way is higher than when laying it over the walls. In addition, when carrying out repairs in an apartment or house, the cable hidden in the wall can be accidentally damaged: before drilling the walls, you need to look at the wiring diagram.
• Installation of the cable in the cable channel. Installation of a cable channel, the price of which is indicated in our price list, is most often used in electrification office space and country houses. The master will pick up suitable size cable channel, install everything necessary elements- plugs, tees, etc. The advantage of this method is the ease of access to the wiring. The disadvantage is not a very good aesthetic effect (which, in principle, is quite appropriate in offices).
• underground laying cable. This type of power cable laying, the price of which is indicated in the price list, requires highly qualified craftsmen and the cost of maintaining earthworks. The installation of the power cable is carried out on the basis of the project, either manually or with the help of a cable plow. The cost of laying the cable in the trench per meter will depend on which option is chosen.
• Mounting overhead line. It is carried out either on porcelain insulators, or by stretching ( optimal view installation will help you choose electricians after inspecting the facility).

• Drawing up a project and assistance in coordinating it with Energonadzor: this condition is mandatory for the initial laying of the cable.
• Calculation of the power consumed by the electrified object.
• Selection desired type cables (note: special types of cables will be required when using outdoor and underground laying schemes).

No modern dwelling is inconceivable without electrical equipment, just as the life of a person in the 21st century is without electricity. Installation of electrical wiring is a mandatory stage in equipping a house or apartment with “life support systems”. At the same time, an increase in the power consumption of electricity was constantly observed.

Why you need to change

The rapid growth of the "home" current load is the factor that determines the need for a new one. The vast majority residential buildings, built during the times of the USSR, electrical wiring was used based on aluminum conductors without the use of protective grounding.

The advantage of such wiring can only be called the minimum cost and ease of installation. But the "Soviet" aluminum wiring is designed only for connecting a minimum of devices. This is a TV, a lighting lamp, a refrigerator, a radio and several other low-power appliances.

Electricians of past years could not have imagined that their descendants would simultaneously connect a computer, a printer, an electric stove, a microwave oven, an air conditioner, and about a dozen different devices to this single-phase, without “earth”, aluminum household electrical wiring.

Aluminum wires are not designed for such a colossal load. An overload on the consumed current can be fraught with any malfunctions up to a fire. Replacing electrical wiring means rewiring it from scratch using copper.

It is pointless to carry out installation in only one room. And do this by screwing new copper wires to old aluminum, it is also unacceptable due to completely different physical properties these metals.

Where to start

The installation of new electrical wiring should always begin with a study of the PUE - the Rules for the Installation of Electrical Installations, namely section 7.1 regarding home electrical wiring.

If you decide to do the connection of a new home electrical network with your own hands, you will need to study the rules for laying the network in order to avoid mistakes that can lead to an accident and even a catastrophe - up to the death of a person.

If you logically decide to entrust the installation of a new electrical wiring to a specialist, knowing at least the basic rules will help control his work.

Before installing the wiring, you need to decide on the following key points.

Decide on the type of input - single-phase (220V) or three-phase (380V). In the vast majority of cases, single-phase is used.

Three-phase input of electrical wiring is advisable only if a workshop or workshop is equipped in the room where three-phase asynchronous motors or similar equipment.

Next, you need to develop a wiring diagram. This is a detailed marking on the plan of an apartment or house of points for placing sockets, switches, main current consumers and, most importantly, lines going to them from the switchboard. When complex work drawn up routing With detailed description order of action.

It is imperative to calculate the total power of the maximum one-time energy consumption of all appliances in the house - it is not recommended if it exceeds 5.5 kW, since they usually do not allocate more power for domestic purposes.

The maximum consumers that will be allowed to work simultaneously are taken into account. Usually this is a refrigerator, lighting systems, a computer and a router, a TV, heating systems (if they are electric), a split system, a washing machine.

Division of plots and choice of installation type

On the wiring diagram it is necessary to divide the sections according to the level of load. In order to save on the cost of the cable for the weakest consumers - lighting lamps, sockets for charging low-power electronics (players, phones), a copper cable with a cross section of 1.5 mm is used, for the main group (almost all household appliances) - 2.5 mm, for the most powerful - an electric stove - copper with a section of 4 mm is used. The input cable must have a cross section of at least 6 mm for each conductor.

An important step is to choose the type of installation - open (in cable channels) or hidden (inside the walls - immured in plaster, hidden behind the panels).

With a tape measure in hand, you need to measure the required amount of cable of each type, purchase a cable and all components - a meter, circuit breakers and RCD (according to the diagram), the box itself for mounting the switchboard, if required.

According to modern standards for the installation of electrical wiring for each group of consumers - a stove, basic household appliances, lighting - a separate machine is installed for protection against short circuits, and a separate RCD is a device protective shutdown- to protect people living in the house from electric shock.

Once you have decided on the scheme and type of new electrical wiring, you can begin to install it. At the same time, first of all, in full electrical wiring is installed in the house, and already in the second it is connected to a common shield and an electric meter.

The last wiring operation is always carried out by a full-time electrician. management company or HOA, since. counter must be sealed.

Basic Rules

Or the house is carried out only in accordance with the PUE. But, despite the seeming severity, most of the basic rules for installing electrical wiring are not so difficult to implement. Here is a short list of them:

• during installation, convenient access to all the main elements of the electrical wiring - automatic machines, RCDs, sockets, switches and junction boxes should be provided (boxes must not be tightly walled up);
• switch installation height - from 60 to 150 cm from the floor, installation location - on opposite side from the one where the door opens;
• electrical wiring is laid only vertically or horizontally; laying diagonally or with free bends is unacceptable;
• the socket is installed at a height of 30 cm (European standard) to 80 cm (accepted in Russia for safety in case of flooding) from the floor;
• the distance from the socket to the gas or electric stove, heating radiator and any pipes - at least half a meter;
• the horizontal wiring line is mounted no closer than 15 cm to the ceiling or floor, vertical - no closer than 10 cm to the edge of the door or window;
• distance between parallel cables - at least 3 mm, or each cable must be in a protective casing (corrugated or armored pipe);

Installation of cables should be only on the terminals inside the junction boxes (sockets can play their role). The connection of the cores by the method of twisting, wrapped with electrical tape, is unacceptable.

In extreme cases, the twist must be soldered and insulated using cambric - heat shrink tubing. Be sure to take care of grounding. If it was not, it must be mounted and connected to a common bus with a bolted connection.

Cable selection

The main materials used for wiring, which is logical, include cable. Neglect the right choice cables for electrical wiring is impossible, since at best this will only lead to an increase in the cost of installing the system, and at worst - to failure of the wiring, breakdown, electric shock or fire.

There is a huge variety of power cables on the market - and that's not counting cables for low current systems- signaling, video surveillance, communication systems. In order not to make a mistake with the choice, we will make a reservation right away: for the installation of household electrical wiring, only the following types of power (!) Cables can be used:

• PVA (limited - only for lighting).

It is strictly forbidden to use as power wires for other purposes, for example, communication cables.

The VVG cable is a Russian single-core copper cable (it is recommended to choose the one on the packaging of which there is an inscription “made according to GOST”, and not according to TU), specially designed for indoor laying in rooms.

It can be used for wiring in networks with voltages up to 1000 V. Inside the cable there are 2 or 3 copper cores, each with a cross section of 1.5 to 10 mm (depending on the type of cable). Each core has individual insulation, all three are additionally protected by a common one. Insulation material - vinyl.

For grounded systems ( mandatory requirement) a three-core cable is used. Marking - VVG 3 * 1.5 (3 wires with a cross section of 1.5 mm) - for lighting, VVG 3 * 2.5 - wiring for household appliances, VVG 3 * 4 - installation of a line for an electric stove, VVG 3 * 6 (or 3 * 10) - input of electrical wiring into the house. Lived in blue insulation - it is always (!) Zero, in yellow-green - earth, in brown, black or white - phase.

The NYM cable is a German analogue of VVG, which is distinguished by an additional layer of intermediate insulation for fire protection. Its advantage is the possibility of installation without additional insulation in rooms with high humidity, as well as the convenience of cutting (due to the design feature).

The disadvantage is more high price than VVG, as well as low resistance to sunshine inherent in PVC, from which its insulation is made. This cable is recommended for installation in cable ducts or strobes, but not in the ground and not on outdoors. Marking is completely similar to VVG.

PVA - strictly speaking, not a cable, but a wire. It consists of three stranded conductors, and is much more flexible than VVG or NYM. But the current load that flexible multi-core can withstand is much lower than single-core.

PVA with a cross section of 1.5 mm can only be used for mounting ceiling lighting, while crimping the ends of the cores with lugs is indispensable. It cannot be used for other electrical wiring elements.

Open and closed laying methods

There are, in fact, only 2 main ways of installing electrical wiring: open, also called external or external, and closed - internal. The first installation method is simpler - it provides for laying cables outside the walls, in cable channels.

First, a cable channel is attached to the wall using dowels and self-tapping screws, then a cable is pulled inside it. Switches and sockets when installing electrical wiring in an open way are also used external. The advantages of the method are the speed of installation, cleanliness and easy access to wiring.

The disadvantage of this installation method is one, but significant - it gives the room a completely “office” look, therefore, in residential buildings and apartments, wiring in cable channels is rarely used, in case of emergency.

Most often, wiring is installed in a dwelling in a hidden way, which can also be conditionally divided into two subspecies. The first type is installation on a wall, which is then covered with plasterboard panels or slabs, and the second is installation inside non-load-bearing walls in niches-slots called strobes.

The last installation method is the most difficult, but the most durable. Wall-mounted and properly connected wiring can last 30-50 years.

How is the closed gasket

Installation of hidden wiring is carried out according to the following algorithm.

First, using a level, pencils or markers, mark the wall, determining the lines for laying cables. In this case, a check is made for the presence of previous wiring using a special tester. On the wall, before starting installation, they also mark the tie-in points of sockets, switches, installation of lamps, junction boxes - up to the shield.

With the help of an impact drill or a puncher with a crown nozzle, niches for sockets and switches are cut out in the marked places.

After that, with a grinder, a puncher with a chisel nozzle or a hammer (in hard-to-reach places), strobes are cut strictly along the marking lines for laying cables. The depth of the groove is about 2 cm.

Wires are being laid (they can be slightly “grabbed” with alabaster), installation of socket boxes and distribution boxes.

The first is the main wire VVG 3 * 2.5 (or NYM 3 * 2.5). It fits into the strobe of the main highway - from the sockets to the distribution boxes, from them to the main shield. AT junction boxes lighting cables with a cross section of 1.5 are connected to it using terminals.

Installation of an electrical wiring line for a large load, with a cross section of 4 mm ( electric stove, boiler) is carried out only in a separate line.

Socket boxes are planted on gypsum mixture. After installing all the wiring lines, the entire system is called by a tester. If no errors are found, then you can proceed to finishing the strobes with plaster, installing sockets and switches.

Shield installation

This is the most difficult and critical part of the installation of the electrical network. Protective circuit breakers and RCDs are mounted in the shield according to the scheme that was previously determined.

The shield includes a thick lead-in cable from the common house bus and through intermediate devices spread throughout the premises. So, for a lighting group, you can use an automatic machine for 16 A and an RCD for 25A / 30mA, for household appliances - an automatic machine for 25A and an RCD for 40A / 30mA, and so on.

Please note that only a professional should select and arrange devices in the switchboard, as well as the final installation of the switchboard!

The shield can either be placed in a niche, if there is one, or simply hung on the wall. Please note that by producing new montage wiring in the apartment, it is also necessary to replace the input to the house, that is, the connection to the common house bus.

In this case, it will be necessary to disconnect the old wiring input from the electric meter and connect a new one, which entails the need to re-sealing the meter. Optionally, you can try to achieve the transfer of the meter to the house, but energy supply companies do not always allow this.

Cable type VVGng is the product most commonly used for indoor electrical installations. Its advantage over other types of cables lies in its flexibility and excellent electrical conductivity, due to the use as a material for conductive cores electrical copper. As well as increased safety insulation from, which practically does not support combustion.

The number of conductive insulated cores in different modifications ranges from 2 to 5, and according to the type of location of the conductors inside the outer sheath and, accordingly, its appearance, distinguish between round cable VVgng and flat (VVGng-P). Conductive conductors of a cable with a specific cross section of more than 16 mm2 are made multi-core. In cables with a smaller cross section, solid conductors are more often used.

The main characteristics of the VVG-ng cable

• The material from which the conductive wires are made: electrotechnical copper.
• Permissible voltage and frequency of the electrical network: 660V, 50 Hz.
• Permitted operating temperature range: not standardized on the territory of the Russian Federation.
• Maximum allowable temperature conductive core +70°С.
• Work with VVGng cable is allowed at negative temperatures not exceeding -10°C.
• Permissible bending loop diameter for a single-core cable is at least 10Dn, and for a multi-core cable - 7.5Dn (Dn - outside diameter cable).
• The service life of the VVGng cable is more than 30 years.

Methods for laying cables VVGng

1. Outdoor installation. Open type wiring is allowed on brick, concrete, plaster and other types of hard surfaces that are resistant to fire.

If it is necessary to cross over the air, you can fasten the VVGng cable with a cable or other suspended structures if they protect the cable from excessive sagging and stretching.

When laying the VVGng cable on wooden surfaces, a protective metal hose, cable channels, corrugated hoses and other insulating materials intended for this purpose should be used.

2. Use of cable-supporting structures. This method is mainly used in the installation of wiring and power supply systems in production halls.

The VVGng cable is laid inside plastic or metal protective boxes, pipes made of various non-combustible materials. Moreover, it is allowed to lay not one, but several cables inside these structures.

According to requirements of the PUE the number of cables laid in a box or pipe is calculated using a special method, since it is necessary not to worsen temperature regime and others performance characteristics providing security.

3. Hidden wiring. Almost all electrical networks in apartments and private houses are mounted in grooves, cavities or voids in the plaster specially made on the surface of the walls.

In the premises of multi-apartment residential buildings, as a rule, a whole network of such channels is provided. However, if desired, it can be "supplemented" - strobe right amount cavities with special tools.

The advantages of networks laid in this way include special reliability and durability, since the possibility of mechanical damage to the cable in closed channels is minimized.

4. Underground laying. Lay the VVGng cable into the ground without additional funds protection from mechanical damage and exposure to moisture Not recommended.

Underground cable laying is only allowed when using protective pipes, ducts or tunnels.

For laying in earthen trenches, it is necessary to use cables of special brands (usually armored and with corrosion-resistant insulation), for example, AAB2l cable

The decision on the choice of installation method is made on the basis of regulatory documents, after studying all the technical characteristics of the connected equipment and other important factors. Only qualified personnel with the necessary permits are allowed to carry out cable laying works.

VVG cable structure

VVG cable consists of two, three or four cores, it also happens with the presence of a grounding and zero core. For ease of connection, the cores of the VVG cable are painted in various colors. You should know that BLUE or BLUE color means that the core is zero, and YELLOW-GREEN core means ground. Take this into account when laying the wiring!

Technical characteristics of the VVG cable

• View climatic design UHL and T cables, placement categories 1 and 5 according to GOST 15150-69
• Operating temperature range: from -50°С to +50°С
• Relative Humidity air at temperatures up to +35°C: up to 98%
• Laying and installation of cables without preheating produced at a temperature not lower than: -15°С

The minimum bending radius when laying single-core cables of the VVG brand is 10 outer diameters, single-core cables of the VVGng brand are 15 outer diameters, and multi-core cables are 7.5 outer diameters.

Rated frequency of the power VVG cable: 50 Hz Test alternating voltage with a frequency of 50 Hz:

• for voltage 0.66 kV - 3 kV
• for voltage 1 kV - 3.5 kV

Long-term permissible heating temperature of cable cores during operation: +70°C

VVG - power cable with copper conductors in plastic insulation and sheath meets the requirements of GOST 31996-2012 and GOST 31565-2012.

Description of VVG cable

The VVG cable is the first generation of power cables in PVC insulation and sheath, it was designed for fixed installation in electrical networks with alternating voltage up to 1000 Volts and frequency up to 50 Hertz. The VVG cable has gained universal popularity due to its low cost and optimal performance, it was not as flammable as a cable with impregnated paper insulation and was more durable, unlike cables with rubber insulation, it was resistant to moisture, unlike cables with HB insulation, but progress does not stand still and it was replaced by the VVGng cable which being an analogue of VVG, it showed more outstanding characteristics in terms of fire safety.

Currently power cable VVG is an outdated position due to its fire hazard, everywhere it is changed to VVGng.

Characteristics of the VVG cable

The VVG cable is operated at temperatures from -50 to +50 degrees Celsius.

The optimum humidity during the operation of VVG cables is up to 98%, at higher humidity it is recommended to use a tropical version of the cable, which is resistant to mold.

Installation of VVG cables is carried out at a temperature not lower than -15 degrees, at more low temperatures preheating of the cable is required to prevent damage to the hardened sheath.

The VVG cable is flame retardant in case of a single laying; additional measures fire safety.

Permissible working temperature heating wires cable VVG 70 degrees.

The maximum heating temperature of the conductors at short circuit, no more than 160 degrees, with more high temperature there is a risk of melting the insulation.

The maximum permissible temperature for heating the cores of the VVG cable under the condition of non-ignition: 350 degrees.

The service life of the VVG cable is at least 30 years from the date of manufacture.

Deciphering the VVG marking

B - PVC insulation.

B - PVC sheath.

G - has no armor.

VVG cable design

1) Core - copper of the first or second class according to GOST 22483.

2) Insulation - PVC.

3) Sheath - made of polyvinylchloride compound.

Application of VVG cable

Power copper cable VVG is used for stationary installation in electrical networks with voltage up to 1000 Volts and a frequency of 50 Hertz. VVG cable is mounted electrical wiring without limiting the level difference along the route; when laying outdoors, additional protection against direct sun rays(HDPE pipe, cable tray, etc.), since ultraviolet radiation significantly reduces the service life of the VVG cable, when laying in the ground, additional measures of protection against mechanical damage to the sheath are required. It is prohibited to lay VVG in buildings and structures according to new fire safety requirements.

VVG cable specifications which allows you to lay it both outdoors and in wet (up to 98 percent humidity) and dry types, has become a popular solution today. The use of this type of cable is quite wide.

Cable laying methods

Open way of laying VVG cable. According to the technical characteristics of this cable, its open laying is allowed on structures and surfaces made of slow-burning or non-combustible materials, such as concrete, plastered surface, brick, gypsum, etc.

Open laying of the VVG cable is not excluded along suspended structures, for example, a cable, etc. At the same time, such structures should provide reliable laying. In the case of cable laying on suspended structures, it is necessary to exclude the possibility of mechanical action on the cable (stretching or sagging).

It is required to install additional protection if there is a threat of mechanical damage to the cable product. When laying the cable in an open way on wooden combustible surfaces, additional protection must be used. Installation in this case should be carried out using a pipe, metal hose, corrugated hose, channel cable and other types of protection.

Hidden laying method cable VVG. This method of laying the cable is the most common in residential areas. Cable laying is carried out in voids, under plaster, in furrows, etc.

Mechanical damage in this way of laying is unlikely, so additional protection is not required. The exception is the voids of the walls in houses made of wood.

Here it is allowed to carry out hidden cable laying in pipes or in other non-combustible materials. Exist regulations for hidden electrical wiring, which determines the correct installation of the VVGng cable in a hidden way.

Laying VVG cable in the ground. As a rule, it is not allowed to lay a cable of this brand underground without special means protection. This is due to the fact that there is no natural protection that will protect the cable from mechanical stress.

Realize VVG cable installation underground is necessary in sealed boxes according to cable structures and flyovers. Additional protection such as tunnels, pipes, etc. may be applied.

VVG cable options

Today in the store you will find a large assortment of wires and cables. The buyer has the option buy cable and wire products, which has different design lived and different insulating coating.

The characteristics of a particular product can be determined by a special marking, which, as a rule, all cables and conductors have. Below we give a breakdown of the most common brands of cable and wire products.

Let’s take a look at how varieties differ from base case. It is very often not clear to novice electricians how the VVGng cable differs from the traditional one. VVG variant, as well as from VVGng-LS:

1) - VVG has a conventional PVC insulation, does not have any self-extinguishing and fire-retardant properties;

2) - VVGng the insulating layer of this cable contains halogen chemical elements that hinder the combustion process;

3) - VVGng-ls, when the sheath of the current-carrying conductors of this cable ignites, practically no gas and smoke are emitted due to the fact that halogen-free polyvinyl chloride is used to create this sheath.

Cable VVG 2*1.5, VVG 2*10, VVG 2*16, VVG 2*2.5, VVG 2*4, VVG 2*6, VVG 3*1.5, VVG 3*10, VVG 3*16, VVG 3*2 .5, VVG 3*4, VVG 3*6, VVG 4*1.5, VVG 4*10, VVG 4*120, VVG 4*150, VVG 4*16, VVG 4*185, VVG 4*2, 5, VVG 4*240, VVG 4*25, VVG 4*35, VVG 4*4, VVG 4*50, VVG 4*6, VVG 4*70, VVG 4*95, VVG 5*1.5, VVG 5*10, VVG 5*120, VVG 5*150, VVG 5*16, VVG 5*185, VVG 5*2.5, VVG 5*25, VVG 5*35, VVG 5*4, VVG 5*50 , VVG 5*6, VVG 5*70 VVG 5*95 is designed for distribution and transmission of electricity for the same voltage class. But there are some differences. The VVGng-ls cable has technical characteristics that allow it to be used in places where the likelihood of fire is especially high. Therefore, in the marking we see the corresponding designations (Low Smoke).

4) - VVGng-frls is a similar model, but in addition to the above, it is also fire resistant (two letters in the marking indicate this - Fire Resistance Low Smoke). When this type of cable ignites, the emission of smoke and gas is reduced. With group laying, combustion does not spread.

In the manufacture fire resistant cable VVGNG-frls uses halogen-free materials, which distinguishes this product from other brands. Halogen-free plastic ensures high level insulation and emits a rated amount of smoke. Fire safety is the main feature of this type of cable.

What does VVG mean by spelling

In the instructions for electrical work, the non-combustible cable VVGng can be seen most often. In terms of price/quality ratio, this is best option. This conductor is indeed quite versatile, as it can be used in flammable buildings and in structures with high humidity. Below are the technical characteristics of this product, as well as its purpose, disadvantages and advantages.

What can the label say? First, let's see what conductor markings are. Knowing the decoding of each letter in the marking, you can easily determine what properties the cable has.

We list the main features by which conductors can be divided.

1. The material used to make the conductive core:

• - the letter A, if it is aluminum;
• - no designation if it is copper.

2. The material from which the insulation of conductive conductors is made:

• - the letter P - polymer insulation;
• - letters Pv - polyethylene;
• - the letter B - polyvinyl chloride.

3. Cable armor:

• - letter G - no armor, bare cable;
• - armored (B).

4. Sheath, outer insulation:

• - the letter B - polyvinyl chloride;
• - letters Shv - has a protective hose;
• - letters Shp - has a protective hose made of polyethylene;
• - the letter P - polymer outer shell.

5. For fire safety:

• - if there is no designation, then with a single laying, the cable does not spread combustion;
• - if the designation is ng, then during group laying the cable does not spread combustion;
• - if the designation is ng-ls, smoke and gas emission is reduced, during group laying the cable does not spread combustion;
• - if the designation is ng-hf, during group laying the cable does not spread combustion, during smoldering and burning corrosive gaseous substances are not emitted;
• - if the designation is ng-frls, in group laying it does not spread combustion, the emission of gas and smoke is reduced;
• - if the designation is ng-frhf, during group laying, the cable does not spread combustion; during smoldering and burning, corrosive gaseous substances are not emitted.

Based on the above, we can decipher VVGng abbreviation: the insulation of the conductors is made of polyvinyl chloride (B), the insulation outer shell also made of PVC (B), special protective layer, no armor (D).

In the language of VVG electric motorists, the decoding sounds something like this: V - vinyl, V - vinyl, G - naked. In addition, the letters ng mean that this cable does not support combustion during group laying. This is a very important parameter if you want to lay the cable in places with a fairly high probability of fire. Safety comes first. Since there is no letter A in the described marking, the cable consists of copper conductors.

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