According to the designation of brands of cable products intended for group installation, letter indices must be added indicating the compliance of the cable products with flame retardation requirements:

• ng(A F/R) - indicator fire danger PRGP 1a (category A F/R);
• ng(A) - fire hazard indicator PRGP 1b (category A);
• ng(B) - fire hazard indicator PRGP 2 (category B);
• ng(C) - fire hazard indicator PRGP 3 (category C);
• ng(D) - fire hazard indicator PRGP 4 (category D).

Features of tests for various categories

• For Category A F/R (applies only to power cables with a conductive cross-section greater than 35 mm2), the cables are secured to a test ladder to obtain a total nominal volume of non-metallic material of 7 liters over a 1 m length of the test piece. Flame exposure time - 40 minutes. This category intended for special designs cables used in specific installation conditions in accordance with the requirements technical specifications on the cable. Category A F/R is not intended for general use.
• For Category A, the cables are secured to the test ladder to obtain a total nominal volume of non-metallic material of 7 L over a 1 m length of test specimen. Flame exposure time - 40 minutes.
• For Category B, the cables are secured to the test ladder to obtain a total nominal volume of non-metallic material of 3.5 liters over a 1 m length of the test piece. Flame exposure time - 40 minutes.
• For Category C, the cables are secured to the test ladder to obtain a total nominal volume of non-metallic material of 1.5 liters over a 1 m length of the test piece. Flame exposure time - 20 minutes.
• For Category D, the cables are secured to the test ladder to obtain a total nominal volume of 0.5 L non-metallic material over a 1 m length of test piece. Flame exposure time - 20 minutes.

The length of the charred part of the sample, measured from the bottom edge of the burner, should be no more than 2.5 m

Cable products must be divided according to fire hazard indicators into the following types of design:

JSC Plant Energokabel sells power cables of version “-ng(A)-LS” own production. The plant is one of the Russian leaders in its market segment, strictly complies with GOST and TU standards, and carries out product quality control at every stage of the production process.

Power cables of the “–ng(A)-LS” design: design features and areas of application

Cables of version “-ng(A)-LS” have copper or aluminum conductors, insulation and sheath made of PVC plastic compound of reduced fire hazard with low smoke and gas emissions (LS), non-flammable (-ng). Thanks to this design, the cables are suitable for group installation in facilities with high demands to fire safety. If there is armor and an external protective hose, the cables can be used for laying in the ground or where mechanical stress is possible.

Cables of the VVGng(A)-LS brand are the most popular products from this series. Such cables are widely used for installing cable lines at industrial facilities, including nuclear power plants, as well as in residential and public buildings.

Sales of power cables of the “–ng(A)-LS” design

At JSC Plant Energokabel you can buy power cables “–ng(A)-LS” V various designs. The plant also offers fire-resistant additional thermal insulation lived in mica-containing ribbons.

Benefits of cooperation:

• wide range of “-ng(A)-LS” cables;
• favorable prices for cable products;
• wholesale and retail sales;
• custom cable production;
• strict adherence to production/shipment deadlines;
• delivery throughout the capital and regions.

To buy cable version “–ng(A)-LS” in Moscow, contact JSC Energokabel Plant. You can make a purchase directly on the website through the shopping cart or the “Quick order” button. To consult with a specialist, call +7 (495) 221–89–93 or ask a question via the feedback form.

Explanation (labeling) Cables and wires made in Russia

Explanation (labeling) of abbreviations used for designations power cables with PVC (vinyl) and rubber insulation (according to GOST 16442-80, TU16.71-277-98, TU 16.K71-335-2004)

A - (first letter) aluminum core, if there is no letter - copper core.
AC - Aluminum core and lead sheath.
AA - Aluminum core and aluminum sheath.
B - Armor made of two steel strips with anti-corrosion coating.
Bn - The same, but with a non-flammable protective layer (non-flammable).
b – Without a pillow.
B - (first (in the absence of A) letter) PVC insulation.
B - (second (in the absence of A) letter) PVC shell.
D - At the beginning of the designation - this is a cable for mining, at the end of the designation - there is no protective layer over the armor or sheath (“bare”).
d - Waterproof tapes for sealing the metal screen (at the end of the designation).
2d - Aluminum polymer tape over a sealed screen.
Shv - Protective layer in the form of an extruded PVC hose (shell).
Шп - Protective layer in the form of an extruded hose (shell) made of polyethylene.
Shps – Protective layer made from an extruded hose made of self-extinguishing polyethylene.
K - Armor made of round galvanized steel wires, on top of which a protective layer is applied. If it appears at the beginning of the designation, it means a control cable.
C – Lead sheath.
O - Separate shells on top of each phase.
R – Rubber insulation.
NR - Rubber insulation and sheath made of flame retardant rubber.
P - Insulation or shell made of thermoplastic polyethylene.
Ps - Insulation or shell made of self-extinguishing, non-flammable polyethylene.
Pv - Insulation made of vulcanized polyethylene.
BBG - Armor of profiled steel tape.
ng - Non-flammable.
LS - Low Smoke - low smoke and gas emissions.
KG - Flexible cable.

Cable with BPI - impregnated paper insulation (according to GOST 18410-73):

A - (first letter) aluminum core, in its absence - copper core by default. If in the middle of the designation after the symbol of the core material, then the aluminum sheath.
B – Armor made of flat steel strips (after the shell material symbol).
AB - Aluminum armor.
SB - (first or second (after A) letter) lead armor.
C – Shell material is lead.
O – Separately leaded conductor.
P - Armor made of flat galvanized steel wires.
K - Armor made of round galvanized steel wires.
B – Paper insulation with depleted impregnation (at the end of the designation) through a dash.
b – Without a pillow.
l - The pillow contains an additional 1 Mylar ribbon.
2l - The pillow contains an additional double lavsan ribbon.
n – Non-flammable outer layer. Placed after the armor symbol.
Shv - The outer layer in the form of an extruded hose (shell) made of polyvinyl chloride.
Shp - The outer layer in the form of a pressed hose (shell) made of polyethylene.
Shvpg - The outer layer is made from a pressed hose made of low-flammability polyvinyl chloride.
(ozh) – Cables with single-wire conductors (at the end of the designation).
U - Paper insulation with increased heating temperature (at the end of the designation).
C – Paper insulation impregnated with a non-drip compound. Placed in front of the designation.

Control cable (according to GOST 1508-78):

A - (first letter) aluminum core, in its absence - copper core by default.
B - (second (in the absence of A) letter) PVC insulation.
B - (third (in the absence of A) letter) PVC shell.
P - Polyethylene insulation.
Ps - Insulation made of self-extinguishing polyethylene.
D - Lack of a protective layer (“bare”).
R – Rubber insulation.
K - (first or second (after A) letter) - control cable.
Besides KG - flexible cable.
F – PTFE insulation.
E - At the beginning of the designation - a power cable for special mine conditions, in the middle or at the end of the designation - a shielded cable.

Hanging wires:

A - Aluminum bare wire.
AC - Aluminum-Steel (the word “steel-aluminum” is more often used) bare wire.
SIP - Self-supporting Insulated Wire.
ng - Non-flammable.

Power, installation wires and connecting cords:

A - Aluminum, the absence of the letter A in the wire brand means that the current-carrying conductor is made of copper.
P (or Ш) – the second letter, denotes a wire (or cord).
R – Rubber insulation.
B – PVC insulation.
P – Polyethylene insulation.
N – Nairite rubber insulation.
The number of cores and cross-section indicate in the following way: put a dash; record the number of cores; put a multiplication sign; record the cross-section of the core.
Brands of wires and cords may contain other letters that characterize other structural elements:
D - Double wire.
O - Braid.
T - For installation in pipes.
P - Flat with a dividing base.
G - Flexible.

Mounting wires:

M – Installation wire (placed at the beginning of the designation).
G - Multi-wire conductor (the absence of a letter indicates that the conductor is single-wire).
Ш - Polyamide silk insulation.
C - Film insulation.
B - Polyvinyl chloride insulation.
K - Nylon insulation.
L – Lacquered.
C - Fiberglass winding and braiding.
D - Double braid.
O - Polyamide silk braid.
E – Shielded.
ME - Enameled.

Explanation (labeling) of some special abbreviations:

KSPV - Cables for Transmission Systems in Vinyl sheath.
KPSVV - Cables Fire Alarm, Vinyl insulated, Vinyl sheathed.
KPSVEV - Fire Alarm Cables, with Vinyl insulation, with Screen, in Vinyl sheath.
PNSV - Heating wire, Steel core, Vinyl sheath.
PV-1, PV-3 - Wire with Vinyl insulation. 1, 3 - core flexibility class.
PVS - Wire in Vinyl Sheath Connecting.
SHVVP - Cord with Vinyl insulation, Vinyl sheathed, Flat.
PUNP - Universal Flat Wire.
PUGNP - Universal Flat Flexible Wire.

Rdecryption (marking) Cables and wires of foreign production

Power cable:
N – Indicates that the cable is manufactured according to the German VDE standard (Verband Deutscher Elektrotechniker - Union of German Electrical Engineers).
Y – PVC insulation.
H - Absence of halogens (harmful) in PVC insulation organic compounds).
M - Installation cable.
C – Availability of copper screen.
RG – Availability of armor.

FROR is a cable made in Italy, has specific designations according to the Italian standard CEI UNEL 35011:

F - corda flessibile - flexible core.
R - polivinilclorudo - PVC - PVC insulation
O - anime riunite per cavo rotondo - round, not flat cable.
R - polivinilclorudo - PVC - PVC sheath.

Control cable:

Y – PVC insulation.
SL - Control cable.
Li - Stranded conductor made according to the German VDE standard (see above).

Halogen-free fire-resistant cable:

N - Manufactured according to the German VDE standard (see above).
HX – Cross-linked rubber insulation.
C - Copper screen.
FE 180 - In case of fire, the integrity of the insulation, when using a cable without a fastening system, is maintained for 180 minutes.
E 90 - In the event of a fire, the cable's operability when laid together with the fastening system is maintained for 90 minutes.

Mounting wires:

H - Harmonized wire (HAR approval).
N - Compliance with national standard.
05 -Rated voltage 300/500 V.
07 - Rated voltage 450/750 V.
V - PVC insulation.
K – Flexible core for stationary installation.

XLPE insulated cables:

N – Manufactured according to the German VDE standard (see above).
Y – PVC insulation.
2Y – Polyethylene insulation.
2X – XLPE insulation.
S - Copper screen.
(F) - Longitudinal sealing.
(FL) - Longitudinal and transverse sealing.
E - Three-core cable.
R - Armor made of round steel wires.

How to decipher the cable brand?

Let’s take as an example a very common cable: AVVG (ozh)-0.66 kV 4x35 and let’s look at its markings.

4x35 - this cable has 4 cores, 35 sq. mm each. each. The number of cores for most groups of cables is from 1 to 5. But for control cables, for example, from 4 to 37. Each core has a cross-section. The cable has a cross-section range from 1.5 to 800 sq. mm. for low voltage cable.

0.66 kV - voltage. For this cable it is 660 V. Cables are low voltage (0.38 -1 kV), medium (6-35 kV) and high voltage (110-500 kV).

(ozh) - execution – single-core. This means that the vein is monolithic, seamless. If there is no “ozh” in the brand, this means, by default, that the design is stranded (mp) or multi-core (mn).

G – flexible or unarmored.

B – vinyl. Shell made of polyvinyl chloride (PVC) plastic.

B – vinyl. Insulation made of polyvinyl chloride (PVC) plastic.

A – aluminum. Aluminum conductor.

All letter markings start from the core. If the letter A is written, then the conductor is aluminum. If the letter A is missing, then the conductor is made of copper.

Depending on the group of use, the following symbols may appear in cable markings:

AVVG-P. Flat, insulated conductors are laid parallel in one plane.

AVVGz. Filled, filled with rubber compound.

AVVGng-LS. ng - non-flammable, PVC plastic compound of reduced flammability. LS - “low tuxedo” (low smoke emission), PVC of reduced fire hazard.

AVBbShv.

B – armor made of steel tapes

Ш - protective hose made of PVC plastic.

c - vinyl. Insulation made of polyvinyl chloride (PVC) plastic.

ASB2lG, ASKl, TsSB.

C – lead sheath.

2l – two lavsan ribbons

G – naked. Protective cover made of two galvanized steel strips.

K - protective cover made of round galvanized steel wires.

C – paper insulation impregnated with a non-drip compound.

K – control

E – common screen made of aluminum foil over twisted cores

APvBbShp.

P – insulation made of silanol cross-linked polyethylene.

p – outer shell made of polyethylene.

APvPu2g.

y – reinforced polyethylene shell

2g – “double sealing”, cross-linked polyethylene insulation with aluminum tape over a sealed screen.

KG – flexible cable.

Interpretation of wire markings.

Now let's look at the question of how to decipher the wire markings. Wires, like cables, are marked with letters, after which the number and cross-sectional area of ​​the current-carrying conductors are written down in numbers. When designating a wire, the following structure is adopted. The letter P is placed in the center, indicating the wire. The letters P may be preceded by the letter A, indicating that the wire is made of aluminum conductors; if there is no letter A, then the conductors are made of copper.

Following the letter P is a letter characterizing the material from which the wire insulation is made:

R - rubber insulation,

B - PVC (polyvinyl chloride) insulation

P - polyethylene insulation

If the wire has a braid of cotton yarn coated with varnish, then this is indicated by the letter L, and if the yarn is impregnated with an anti-rot compound, then the letter in the wire brand is omitted. The letter L is placed on last place in the wire brand designation.

Wires for electrical installations stamps

PVs have digital indices 1; 2; 3 and 4. These numbers indicate the degree of flexibility of the wires. The higher, the more flexible the wire.

Wires for overhead power lines are deciphered as follows:

SIP - self-supporting insulated wire. Insulation made of light-stabilized cross-linked polyethylene.

SIP-1 - with uninsulated neutral

SIP-2 - with insulated neutral

SIP-4 - with insulated conductors of equal cross-section.

A - bare wire twisted from aluminum wires

AC - uninsulated wire consisting of a steel core and aluminum wires

New regulatory requirements, developed in accordance with Federal Law No. 123 "Technical

Regulations on fire safety requirements" regulate the need

When installing communication lines, use fire-resistant cable to ensure the required

Operating time of systems in case of fire.

According to clause 4.1 of the set of rules SP 6.13130.2009 “Fire protection systems.

Electrical equipment. Fire safety requirements": "cable lines of systems

Fire protection must be made with fire-resistant cables with copper conductors, not

Fire propagating when laid in groups according to category A according to GOST R IEC 60332-3-22

Low smoke and gas emission (ng-LSFR) or halogen-free (ng-HFFR)."

Preferred areas of application of cable products, taking into account their type of execution

Defined in GOST R 53315-2009 and GOST R 53769-2010.

Predominant area of ​​application of fire-resistant cable

When designing security systems, a cable with the end of

In the marking ng -FRLS (for example cable KPSEng FRLS 1x2x0.5), although it is more logical to use

Cable ng-FRHF (KPSEng FRHF 1x2x0.5).

The LS index, which is an abbreviation for Low Smoke, literally means "lowered

Smoke emission" is apparently more understandable compared to the HF - Halogen Free index, which

Means "halogen-free". Perhaps this is the reason why more widely

The cable used is ngFRLS, rather than fire-resistant cable with the index ngFRHF. Obviously the role is the same

The good thing is that the price for KPSEng FRLS cable is always a little lower.

According to GOST R 53315--2009 with amendment No. 1 "Cable products. Fire safety requirements

Safety "NGFRLS cable is used" for installation, taking into account the volume of flammable load

Cables, in internal electrical installations, as well as in buildings, structures and closed cable

structures", while fire-resistant cable ng FRHF - "for laying, taking into account the volume of flammable

Cable loads in internal electrical installations, as well as in buildings and structures with mass

The presence of people, including in multifunctional high-rise buildings and buildings -

Complexes."

Cable fire hazard class

According to GOST R 53315--2009 in the fire hazard class designation:

• the first indicator is the fire propagation limit (O1 or O2 for a cable tested singly, or P1--P4 for a cable product tested during group installation)
• the second is the fire resistance limit;
• the third is an indicator of corrosion activity;
• fourth - toxicity indicator;
• the fifth is the smoke generation indicator.

So a cable with a declared fire resistance of at least 180 minutes type ng(A)-FRLS (for example KPSEng

FRLS 1x2x1) has fire hazard class P1b.1.2.2.2

Cable type ng(A)-FRHF (for example cable KPSEng FRHF 1x2x1) - has a fire hazard class

P1b.1.1.2.1. Accordingly, the use of ng(A)-FRHF cable provides not only minimal

Emission of corrosive gases, but also significantly less smoke emission compared to

Cable ng(A)-FRLS. Therefore, for complete clarity, the ng(A)-FRHF cable is correctly called

Fire-resistant, halogen-free and smokeless, non-flammable when grouped

Gasket.

Halogens, corrosivity and toxicity

NGFRLS cable (for example KPSEng FRLS 2x2x1 cable) when exposed to high temperatures And

Flame releases halogens. The most famous of them are chlorine and fluorine. This toxic substances And

Vigorous oxidizing agents that cause corrosion, which seriously limits application possibilities

Such a cable. In case of fire, highly toxic gaseous chloride

Hydrogen released from the material collapsing under the influence of temperature cable insulation,

It spreads throughout the object and, combining with water vapor, condenses in the form

Concentrated hydrochloric acid.

Acceptable values ​​of indicators of corrosion activity of products according to GOST R 53769-2010

Smoke and gas emissions during combustion and smoldering of insulation, shell and protective materials

Cable hoses with the LS index and the HF index differ by 28 times!

Smoke emission

The NGFRLS cable (for example, the KPSEng FRLS 1x2x0.75 cable) is quite smoky - when

Destruction in a flame according to GOST R 53315-2009, a reduction in light transmission of up to 50% is permissible,

Cable VVG(a), also known as power wire VVG(a), also known as cable VVGng a, is a flame retardant wire that is used for the transmission and distribution of electricity, which occurs in stationary installations that have an electric current frequency of 50 Hz and a rated voltage of up to 660 or 1000 V. extremely widely - it can be used in any climatic conditions, at high altitudes, in water - virtually anywhere, unless, of course, it is damaged. This subtype is especially often used in places where there is an increased risk of a fire - for example, in enterprises working with flammable or explosive components.

Decoding of VVG(a) cable

The marking allows us to understand in more detail what this cable is. Here is its decoding: “VVG” means “vinyl-vinyl-naked,” which refers to the presence of two layers of polyvinyl chloride, as well as the absence of a specialized protective layer. Well, “ng”, if used in marking, means that the cable, in the event of a fire hazard, will not spread combustion. The letter “a”, very often placed in brackets, means the category of non-propagation of combustion according to. In particular, this means that even when laid in bundles, these cables do not propagate combustion, while traditional VVGs can “boast” of this only when laid individually. This letter should not be confused with the “a” that is placed before the abbreviation and means that the cable is not copper. IN in this case it's definitely copper. Often ls, frls, frlsltx, frhf are added to the marking, but in essence this is one cable.

Technical characteristics of VVGng (a)

U VVGng A a number of parameters can vary. For example, this may be the form factor of the cores (which can be round, triangular or flat), their number (from 1 to, as a rule, 5), their sections (from 1.5 mm 2 to 50 mm 2, and sometimes even more), nominal diameter (directly dependent on cross-sections), weight (from several tens of kilograms to several tons per kilometer). Allowable current can vary from 21A to several hundred, depending on both the type of cable and its location. As you can see, variations of this product There are a great variety, so before you buy a cable, you need to study in detail the description of its specific brand; it is this description that will save you time and nerves in the future. The price, again, varies depending on the complexity and size of the cable. But in comparison with other types of VVG, the cost remains at approximately the same level. But any cost is very justified, because the cable will serve you under proper operation conditions for more than thirty years, five of which, as a rule, will be under warranty.