Wire PuGV - decoding and main characteristics. Explanation, description and technical characteristics of the wire Pugv Pugv decoding GOST

The PuGV wire is a power conductor whose cores are made of copper. PVC plastic was used as an insulating composition. This cable is characterized by the absence of a sheath. Produced in accordance with GOST R 53768-2010 standards. The cores are assembled from tinned copper wires(rods). The number of rods is 7 or more. Operation is carried out in enclosed spaces for stationary units. In the absence of direct exposure to solar radiation, installation under canopies is allowed. Work in conditions of precipitation is not allowed. With the closed installation method, installation work can be carried out under layers of plaster, in brick and concrete masonry.

Decoding

The PuGV cable is deciphered as follows:

• P is the common name for cable conductors, hereinafter referred to as wire.
• y is an installation-type product used in electrical installation of conductor lines.
• G – wire flexibility index. This marking refers to stranded conductors as opposed to, for example, cords.
• B – PVC is used as insulation.

Thus, this product is a single-core conductor. Current-carrying elements are made of copper wires twisted together. There is no shell, PVC insulation.

The numbers that follow indicate the area cross section wires in mm2. For example, PuGV-4. The next letter index characterizes the color marking of the insulation (B - white, K - red, etc.). This condition is discussed when placing an order for the product based on information about the further use of conductor products.

Features and Benefits

The PuGV power cable meets the requirements of numerous international standards based on its design and technical and technological parameters. Due to the great flexibility of the product, it is possible to lay the wire in a box, various pipes, etc.

With a single installation method there is no risk of fire. The service life is more than 20 years. The duration is calculated from the moment the product is released. In this connection, NTD has high requirements for various cable characteristics.

Information about the manufacturer, as well as product markings, are applied to the insulation surface with a stamp or in relief. The designation should not be interrupted, possibly several additional designations, the distance between which should not exceed 500 mm. The above information includes length, manufacturer, production time, weight and GOST number. Has appropriate confirmation of technical control in the form of stamping and certification marks.

Wire colors

The installation wire PuGV has a variety of color scheme. The color coating is only continuous. It is possible to cover it in the form of double longitudinal strips, which are located diametrically. Each stripe has a natural color. Provided that the PuGV cable is used as a grounding cable, the insulating coating should be yellow-green. When used as neutral wires, blue color is used. Color marking is discussed when placing an order.

In the absence of instructions on the color designation, the manufacturer reserves the right to choose. This is possible when ordering, for example, conductors with mixed and transitional colors. However, the content of such products must be less than 10% of the total order.

Application

This type of conductor is used to power stationary electrical units in lighting and electrical systems. In addition, for electrical installation of various electrical devices, apparatus and mechanisms in enclosed spaces. The alternating voltage is up to 450-750 V with a frequency of up to 0.4 kHz. In networks with constant voltage 1 kV.

This conductor complies with the rules and regulations of the following international standards for design and technical and technological characteristics: IEC 60227-1:2007, IEC 60227-3:1997, IEC 60227-4:1997.

The products are used for installation in electrical systems requiring increased flexibility during installation work. Laying is possible in boxes, pipes, etc.

Wire composition

1. The cores are made of tinned copper wires in accordance with GOST 22483-77.
2. The insulation is made of colored PVC plastic.

Specifications

Buy PuGV wire

Our company supplies these products throughout Russia. The purchase and sale process is based on the availability of goods in stock or on order from manufacturers. You can leave us your request in a way convenient for you (via the website or by e-mail). The product has all the necessary certificates and quality marks.

The price of PuGV wire is calculated depending on the volume of copper used during its production. Additional discounts are available depending on your volume. You can purchase this wire and determine the exact cost by sending us your request.

Delivery of goods is carried out within 24 hours after payment. In a minimum period of time, a technical proposal will be drawn up for you, discounts and a method of delivery of goods will be selected.

Methods of inspection and product quality

The products can be checked using an external inspection, on the basis of which a preliminary assessment of the condition of the PuGV cable is made if the measured values ​​and parameters are in doubt.

During determination electrical resistance The contact point of the test leads must be properly checked. Allowed definition resistivity cable. A unit of conductor is measured with further calculation for the entire length.

The final conclusion about the quality status is obtained after laboratory tests. However, the cable has several advantages that allow it to be used quite widely with a guarantee and high reliability.

Wire installation

The conductor is used in lighting networks and stationary power systems. Provides power to electrical installations, various machines and objects.

At installation work with a temperature of -15? C, the cable is wound onto a cylinder with a diameter of 5D, where D is the outer diameter of the wire. One example is installation in a refrigeration unit.

The best manufacturers

The cable products market offers a wide range of products. However, this is not a guarantee High Quality products. Not every product meets the requirements of GOSTs. Manufacturers of PuGV wire that have proven themselves in the market: Kavkazkabel, Energokabel, Kamkabel.

Wire PuGV 1x25 is a power-type installation product, which contains a copper core made of one wire with a cross-sectional area of ​​25 mm2. The insulating layer is made of PVC with different colors. Regulatory support - GOST 31947-2012. A conductor is required when laying...

The power wire PuGV 1x95 includes a current-carrying part made of copper. For its production, a bundle of wires is used, total area which is 95 mm2. The next layer is insulating PVC plastic compound with different colors: black, blue, gray, brown, red, yellow-green, ...

PuGV wire- This is a power conductor with copper conductors. Most often it is insulated with polyvinyl chloride and does not have a shell. It can be used both in the implementation of building wiring and for laying power cable lines.

The cable cores consist of a group of tinned copper rods. The number of rods varies depending on the type and manufacturer, but is usually at least seven. Such cables are used indoors closed type to supply stationary devices with electricity. Laying outdoors is allowed, provided there is protection from direct contact sun rays and precipitation (canopies and similar devices are used for this).

Application area

In lighting networks, power lines. Widely used in rooms of varying degrees of humidity - normal, damp, especially damp, with the presence of steam emissions of acids and alkalis. If the temperature environment does not exceed 40 degrees Celsius, it can be used to connect launch boxes, light panels, closed cabinets.

Multiple bends of the wire are allowed. This wire replaced the wires PV1, PV3, PV4.

Multifunctional wire PuGV is used for electrical installations for stationary installation in networks of various directions (lighting, power networks), installation of electrical equipment, devices, mechanisms and machines with alternating voltage up to 750 V, or direct voltage up to 1000 V.

Explanation of the name

Explanation of the abbreviation PuGV:

• P - wire;
• U - installation;
• G - flexible;
• B - with polyvinyl chloride insulation.

PuGV performs a connecting function for electrical installations; it has one core, the cross-sectional area of ​​which is determined depending on the standard size. The core flexibility of conductors of this type can be of three classes: 3, 4 or 5 according to GOST standards. The cable can be used in moderate and cold climates (UHL, from +40 to –60 °C) and more severe conditions.

Benefits and Features

Increased flexibility allows you to lay the cable in a box and all kinds of pipes. You can lay lines with a variety of bends and turns. If the wiring does not involve the presence of other types of electrical wires, then the likelihood of a fire is minimized. With proper operation, the service life of such a line can be twenty or more years. The service life should be calculated from the date of manufacture.

Supplied without additional protective layers and shells, since PVC is not afraid of light, water and mechanical damage (within reasonable limits).

Design Features

It consists of a core that passes electric current and PVC insulation. Flexibility is achieved due to the fact that each current-carrying core consists of several copper wires, which are connected by twisting. Sections from 0.5 mm² to 35 mm² consist of 7 or more wires twisted together.

The flexibility of an electrical wire is inversely proportional to the cross-sectional area: the larger the area, the less flexible the cable. Also, flexibility depends on the diameter of the individual wires located inside; the larger their diameter, the lower the flexibility index.

Sectional view of electrical wire

The thickness of the insulation depends on the cross-section. It is possible to use two-layer insulation, but in this case the first layer must be 70 percent of the total insulation thickness or more. Colors are determined depending on the customer’s needs, or standard colors are used.

Polyvinyl chloride insulation significantly increases the service life of wiring due to its chemical properties. It decomposes slowly, is not afraid of moisture, extreme temperatures and corrosion, and also has a significant margin of safety that does not allow rodents to chew through the wiring. In addition, it has a special smell that repels rats and mice.

It is worth emphasizing that PVC cables with double-layer insulation are safer. The double layer reduces heating from current, reduces the likelihood of fire and increases resistance to high temperatures generally. Therefore, PVC electrical wires are often used in high-voltage lines.

Specifications

Flexibility is important distinctive feature For this type of cable, the bending radius is measured in outer diameters. Thus, the bending radius of the PuGV is ten or more diameters.

Other mechanical characteristics:

This type of wiring can withstand 450 to 750 volts of alternating current having a frequency of 400 Hz or 1000 volts of direct current. Withstands environmental humidity up to 98%.

Important! PuGV wire (especially PuGVng-LS) is often used in places with high temperature stress - baths and the like; it is considered safer because it does not burn. Special insulation protects the cable from fire, so in the event of a fire it only melts. The insulating shell can withstand temperatures of +160 degrees Celsius. Thanks to this, PuGVng LS is used as leads for electric motors and for charging. lighting fixtures with temperatures from +80 to +180 degrees.

Laying method

It is allowed to lay lines in pipes, on insulators, rollers, and cleats. Also laid on top of metal and concrete surfaces, in this case it is necessary to place insulation under the cable.

PuGVng-LS

PuGVng-LS is a low-voltage cable fire danger. It is distinguished by the presence of a single copper core of increased flexibility. This modification emits low amounts of smoke and gas and does not burn. PuGVng-LS is used in the construction of lines with an increased risk of fire.

Low fire hazard electrical wire

GOST and other legal requirements

Since 2012, the state standard for PuGV lines has been established by GOST 31947–2012, and for the requirements fire safety meets the GOST 31565–2012 standard. The modern standard meets international standards. Technical characteristics are determined by the requirements of TU16–705.501–2010.

It should be noted that GOST R 53768–2010, which should have been followed earlier, has now been canceled and has no legal force.

What is the difference between PuGV and PV-3

The presence of two names often causes confusion. In essence, both abbreviations refer to the same cable, it’s just that PuGV is a newer name that corresponds to modern GOST and differs only in increased requirements for flexibility. Outdated standards corresponded to flexibility classes 2, 3, 4, and modern standards they should be 3, 4 and 5.

Packaging requirements and quality control

The cable must be wound on a drum or supplied in coils. The minimum length is 100 meters.

Quality control is carried out by external inspection for the presence of insulation damage, as well as using special instruments for measuring resistance.

Video on the topic

PuGV wire appeared on our market only in 2010. But this does not mean at all that this is the latest development and you could not find this wire on the market before.

The fact is that in 2010 the new GOST R 53768-2010 came into force. According to this normative document The marking of the wires has changed and the PV-3 wire, which has long proven itself, began to be called PuGV wire.

In order to understand what PuGV is, let’s take a detailed look at the decoding of its name. And then we’ll try to understand the features of its design and varieties.

Decoding the marking of the PuGV wire

Let's start our analysis by deciphering the name. After all, no matter how it is, it is in it that the main parameters of the wire are hidden. And understanding this abbreviation should already give us an understanding of the design of the wire.

So:

• Our first symbol is “Pu”. They mean that we have an installation wire in front of us. Previously, wires were divided into installation and installation. Installation wires were called less flexible wires, and installation wires were more flexible. There were other differences, but these are the main ones. Now they decided to call all the wires installation ones.

• But the flexibility of the wire still needs to be determined. Therefore, we decided to introduce the symbol “G”, which indicates that the wire is flexible. If this symbol is not present, it means that the wire is not flexible. The symbol “G” is assigned to all wires belonging to the fifth class of flexibility according to GOST 22483 - 2012.
• The last character is "B", which indicates the type of insulation. In our case, this is vinyl insulation or, as it is more correctly called, polyvinyl chloride. In addition, the abbreviation may contain another letter “B”. It indicates the presence of a shell and indicates the material of this shell. But this is a different type of wire.
• The last symbol that can be in the abbreviation is the fire safety indicator of the wire. Moreover, if this abbreviation is not present, it means that the cable does not propagate combustion when laid alone. If the symbol “ng” appears, it means the wire does not spread flame when laid in groups.

In addition, for wires with the designation “ng”, GOST assumes the possibility of having some more symbols. So “LSLTx” speaks of reduced dust and gas emissions during combustion.

The “HF” symbol indicates that the cable does not emit corrosive gases when burned. Well, the “HFLTx” symbol demonstrates that the wire, when burned, emits little dust, gas and corrosive substances.

Numbers are usually indicated after the abbreviation. Usually this is one number from 0.5 to 240. It indicates the cross-section of the current-carrying part of the wire. And only in rare cases can you find the symbols “1x1” or the like, in which the first digit indicates the number of cores, and the second the cross-section of the current-carrying part of the wire.

PuGV wire design

Now we can talk about the design of the wire itself. As we have already mentioned above, PuGV wires are single-core and due to this their design is quite simple.

So:

• First of all, it is a conductor, which consists of several copper wires. Individual wires of smaller cross-sections twisted together make it possible to ensure proper flexibility of the wire even with a large total cross-section.
• The number of these individual wires depends on the cross-section of the cable. So for wires with a cross-section from 0.5 mm 2 to 35 mm 2 the minimum number of wires is 7 pieces. But usually for larger diameters there are more of them and their number is determined by the technical regulations of each individual manufacturer.
• For wires with a cross-section from 50 mm 2 to 95 mm 2, the instructions provide for the use of at least 19 wires. And for larger cross-section wires there are 37 wires.
• But this is the minimum value. The actual value can be found out based on the cross-section of each individual wire. After all, it is quite logical here that the smaller the cross-section of each individual wire, the greater their number will be required in order to obtain the required nominal cross-section of the wire.
• And here standards come to our aid again. So for a wire with a cross-section of 0.5 mm2, the cross-section of each individual wire should be no more than 0.21 mm2. For a wire with a cross-section of 10 mm 2 this value should already be no more than 0.41 mm 2, and for a wire with a cross-section of 240 mm 2 it will be equal to 0.51 mm 2.

• In addition to the conductor itself, each wire must have insulation. And here it is also quite logical that the larger the cross-section of the wire, the thicker its insulation should be.
• And here standards come to our aid again. They standardize the nominal insulation thickness, its minimum value and the maximum outer size of the wire. You can see these values ​​in more detail in the photo below.

Well, the last aspect regarding the design of the wire includes its coloring. At all this parameter is not standardized and the wire can be solidly painted in any color. Only for tropical wires it is not recommended to use natural colors. In other cases, this aspect is discussed with the customer.

Note! If the PuGV wires are intended for use as a grounding conductor as in the video, then they should be yellow-green in color. In this case, any 15 cm of wire should account for no more than 70% of one color and no less than 30 cm of another.

Electrical and mechanical characteristics of PuGV wires

The main condition influencing the choice of wires is its characteristics. They are divided into electrical and mechanical.

Electrical characteristics of the wire

Since the main purpose of the wire is to pass electric current, then of course we’ll start with the electrical parameters.

And here the efficiency and reliability of PuGV is important for us:

• To determine the efficiency of a wire, we need to know its resistance. The lower this parameter, the less loss there will be in the wire. But as you probably remember from physics lessons, the lower the temperature of the conductor, the lower its resistance. Therefore, to standardize this indicator, all calculations are usually made for wires with a temperature of 20⁰C.
• But there is another aspect to this. The higher the cross-section of the wire, the lower its resistance. Therefore, each wire size has its own standards. So a wire with a cross section of 1x6 has a resistance of 3.11 Ohms per kilometer of length, and a wire of 50 mm 2 has a resistance of 0.394 Ohms/km.

• If the cable being measured has a temperature other than 20⁰С, then to check you should use the formula - R 20 = R t K t 1000/L. In this formula, R 20 is our resistance at 20⁰С, R t is the measured resistance of the wire, K t is the correction factor, which we determine from the table below, and L is the length of the measured section of wire.

• But the reliability of PuGV wires is ensured by high-quality insulation. For this purpose, special high-voltage insulation tests are carried out. A voltage of 2.5 kV is applied to the wire and the conductor must withstand it for at least 5 minutes.
• In general, at a temperature of 20⁰C, the insulation of the PuGV wires should be at least 5 MOhm. For installations up to 1000V this is quite enough.
• In addition, the rules require that the insulation properly withstand elevated temperatures. To do this, they provide data on the minimum insulation resistance at a temperature of 70⁰C. You can see these requirements in the photo below.

Mechanical characteristics of the wire

But the mechanical requirements for the wire are no less important. After all, ease of installation and the possibility of using in different rooms, as well as in different temperature conditions.

So:

• One of the most important parameters of any wire or cable is its flexibility.. It depends on how far the wire can be bent without fear of damaging the conductors or insulation. The determining factor in this case is the bending radius.

The bending radius directly depends on the nominal diameter of the wire. And specifically in our case it is 5 diameters of PuGV. This is enough good indicator. For most less flexible products it does not exceed 10 or even 20 diameters.

• As for aggressive environments, the wire tolerates high humidity very well.. So, at a temperature of +35⁰С, it can be operated in an environment with 98% humidity. And here sunlight All wires in PVC insulation are poorly tolerated, and our PuGV is no exception.
• The operating temperature range of PuGV is also quite high. There, the wire can safely work both at minus 50⁰С and at temperatures up to plus 70⁰С.

Note! If you plan to install the wire yourself, then you must remember that the minimum temperature at which this wire can be installed is -15⁰C. But better installation perform at positive temperatures.

• The service life of PuGV wires is usually 20 years. Guarantee period service usually lasts 2–3 years. But given experience, under normal operating conditions, this brand of wire can last you much longer.

Stages of selecting PuGV wires

It is also interesting that the standards provide for separate stages for wire acceptance.

These rules are quite simple and can be used by private individuals:

Conclusion

The technical characteristics of PuGV wires make it possible to use it to solve a wide variety of problems both in industry and in individual households. After all, the wire has very good electrical properties, excellent flexibility and reasonable price.

Some disadvantages include the fact that the wire is single-core, but in many cases this is an advantage. Therefore, if your choice fell on PuGV brand wires, then this is a very good choice.

For organizing electrical wiring that is located inside or outside industrial premises, as well as for connecting various electrical equipment, electrical appliances, electrical mechanisms, etc. use an installation wire. It is used most often in the case of stationary installation, that is, when the equipment is installed on its own permanent place. There are several brands of such cables that are designed to work in different conditions.

When installing an electrical network alternating current with a rated voltage of 450/750V and a frequency of no more than 400Hz or direct current with a voltage of no more than 1000V electrical cables and wires used during installation must comply with GOST 31947-2012.

Marking of installation wires and cables

According to GOST, the marking of such electrical installation products is deciphered as follows:

• The first two letters determine the type: wire (Pu) or cable (Ku);
• The third letter characterizes flexibility. The symbol G indicates that the product has increased flexibility. If you do not plan to bend the conductor during the installation process, then you can choose a brand without the letter G;
• The fourth character identifies the insulation material. If the protection is made of polyvinyl chloride plastic, then the marking contains the symbol B, if polymer materials, then the symbol P.
• The fifth symbol characterizes the degree of fire hazard. For example, if the letter is missing, then the conductive element does not support combustion in the case of a single gasket. If the designation is “ng (A, B, C, D) - LS”, then it does not support combustion when laid in a group (A, B, C and D indicate categories), if the marking is “ng (A, B, C, D) – LSLTx”, then when laid in groups, the cable not only does not support combustion, but also has reduced gas and smoke emission. In addition, conductors marked with this marking do not emit toxic substances into the environment at elevated temperatures.

The marking also includes the following characteristics:

• The climatic design is written with a hyphen from the brand (determined according to GOST 15150);
• Number and nominal cross-section of cores (written using a multiplication sign). If there is a ground wire in the cable, then after the “+” symbol the symbols “PE” are added, if zero, then the symbol “N” is entered. Next are their characteristics;
• At the end of the markings are indicated technical specifications for the operation of products (determined in accordance with GOST 15150).

Design of PuGV (analogue of PV-3)

According to GOST, for marking PUGV, the decoding is carried out as follows: installation wire of increased flexibility with insulation made of polyvinyl chloride plastic. It can be laid in trays, gutters, boxes and other places where it is necessary to bend conductors.

PUGV inside have one conductive core, which is made of twisted annealed copper wires. For different cross-sectional diameters of cores, it is provided minimal amount wires and their thickness.

According to the standard, for conductors with increased flexibility, the cores must comply with class 5.

Interpretation of the cable marked pugv - 1x4. The numbers at the end of the name indicate that the product has one core with a diameter of 4 mm.

The following requirements are met for insulation:

• should cover the core tightly enough;
• when removing it, it should be freely removed without damaging the conductors;
• the protective coating must not be damaged: cracks, dents or thickenings;
• the shell must be homogeneous, without foreign impurities and have no pores.

Technical characteristics of PUGV wire

According to GOST, installation cables can be used in the temperature range from -40°C to +65°C. They must also not lose their performance characteristics in rooms with high humidity(up to 98%) and temperatures up to +35°C. Prolonged heating of the product to a temperature of +70°C is allowed.

The minimum service life for this brand is at least 15 years, although some manufacturers guarantee a longer period - up to 20 years or more.

Technical characteristics of PUGVV

When laying electrical networks PUGVV wire can be used. The insulation and conductive part in it are made of the same materials as in PUGV, only it additionally has a shell, which is made of PVC plastic compound with filling the space inside the conductor, and can have from one to four cores.

This type is used when installing electrical wiring in the voids of various building structures, in concrete, as well as under plaster, drywall, etc. It can be used when installing electrical wiring located on the surface of walls and ceilings.

Interesting. In the case of a single-core version, the color of PVC plastic can be any. If the wire is multi-core, then a different color of insulation is used for each wire.

For two-core, white and blue colors, for three-core - white, blue and yellow-green.

Yellow-green is usually used for ground, blue for zero, white (or another color) for phase.

Design characteristics of PuGV and PuGVV wires

Permissible current loads at conductor temperature +70°С and ambient temperature +20°С

Permissible current loads at conductor temperature +35°С and ambient temperature +25°С

Features of storage and laying

The shelf life of electrical installation products depends on the conditions in which the cable is located. Yes, on open area the period should not exceed 2 years, under cover - 5 years, in indoors- 10 years.

Produced in accordance with GOST 6323-79.

OKP code 355113.

Subject to mandatory certification in the Russian State Standard system.

Description and design of the PuGV wire

Installation wire PuGV - wire with one flexible copper core, with insulation from PVC plastic, without shell.

Explanation of the designation:

absence of the letter “A” at the beginning – copper core;
“Pu” - installation wire;
“G” - for installation conditions requiring increased flexibility;
“B” - PVC insulation, including low fire hazard and heat-resistant;

Designation example: PuGV-2.5 - PuGV wire with a conductor cross-section of 2.5 mm 2

Since PuGV installation wires are intended mainly for industrial use and are designed for a long service life, GOST sets strict requirements for finished products in terms of structural, electrical and mechanical parameters. The values ​​of individual parameters are also regulated for the period of operation and storage.

The range of produced sections of PuGV installation wires is from 0.5 to 95 mm 2.

The cores must be twisted from individual wires (at least 7 wires for sections up to 1.5 mm 2 inclusive and with the diameter of individual wires for the most used sections not exceeding that indicated in the table).

The insulation must fit tightly to the core and be removed without damaging the core. The nominal and minimum values ​​of the radial insulation thickness and the maximum outer diameter for wires of the most commonly used sections up to 50 mm 2 are given in the table.

It is allowed to repeat the configuration of the current-carrying core on the insulation surface within permissible deviations.

PuGV wires must be manufactured various colors. The coloring must be solid or done by applying two longitudinal stripes to the insulation natural color, located diametrically. For single-core wires used for grounding purposes, the insulation should be a solid yellow-green color.

The color of solid insulation or longitudinal strips must be specified in the order (the letters indicated in the table are added to the wire designation when ordering, for example: PuGV-2.5 Zh).

If there is no indication of a specific color in the order, the manufacturer supplies wires at its discretion, while it is allowed to supply wires with insulation of transitional and mixed colors (designation “BC”) in a volume of no more than 10% of the batch.

Conditions for installation and operation of the PuGV wire

Operation is allowed at ambient temperatures from minus 50°C to a temperature at which heating of the cores does not exceed plus 70°C. Installation must be carried out at a temperature not lower than minus 50°C. The minimum bending radius when laying is 5 outer diameters. Does not propagate combustion when laid alone. Service life – at least 15 years.

Technical characteristics of PuGV wire

Electrical resistance of current-carrying conductors on DC for wires with a cross-section of up to 50 mm 2 upon acceptance and delivery should be no more than that indicated in the table. For wires with a cross section of 0.75; 1 and 1.5 mm 2 core resistance depends on the core design.

For the period of operation and storage, it is allowed to increase the specified resistance values ​​of the cores by 20%.

The electrical insulation resistance per 1 km of length at a temperature of 20°C must be at least 1 MOhm upon acceptance and delivery and at least 0.01 MOhm for the period of operation and storage.

Upon acceptance and delivery, finished wires must withstand, when immersed in water without preliminary exposure to it, testing with an alternating voltage of 2000 V at a frequency of 50 Hz for 5 minutes, applied between the conductor and water (for the period of operation and storage - 1000 V under the same conditions).

The wires must withstand winding at a temperature of minus 15°C into a cylinder (drum) with a diameter equal to 5 outer diameters of the wire (on a special installation directly in the refrigerating chamber).

Requirements for packaging of PuGV wire

PuGV wires must be supplied in coils or on drums. The diameter of the coil or the diameter of the drum neck is not regulated, but should not be less than 10 outer diameters of the wire.

The construction length must be at least 100 m. In one delivery lot, no more than 10% of wires with a length of at least 20 m are allowed.

Labeling requirements

Wires must have the manufacturer's designation and the wire identification, which must be made in the form of a continuous marking on the insulation surface. The marking may be printed, embossed or stamped onto the surface of the wire. The distance from the end of the marking to the beginning of the next one should not exceed 500 mm. It is allowed to mark wires with a cross-section of up to 6 mm 2 in the form of a distinctive thread or colored stripes or solid marks.

The label attached to the coil or drum, or on the cheek of the drum, must indicate:

Trademark of the manufacturer;
- symbol wires (full, indicating the number of cores and cross-section);
- length in meters;
- gross weight (for drums) in kilograms
- date of manufacture (year, month);
- GOST designation.

The label must bear a technical control stamp and a certification mark.

For wires supplied on a drum, the label attached to the coil or drum, or on the cheek of the drum, must indicate the number of segments and their length through a plus sign from the top to the bottom layers in meters.

Requirements for storage conditions of PuGV wire

According to climatic conditions, wires must be stored indoors.

Weight and size parameters of PuGV wire

Approximate weights of the most common wire cross-sections for packaging and transportation purposes are given in the table. The given values ​​may differ for wires of different batches and manufacturers by 10% less or more.

PuGV wire load currents

Permissible load currents for wires are not regulated in GOST. In accordance with the PUE, for any installation method it is recommended that for single wires not exceed the load currents indicated in the table.

Available methods for quality control of PuGV wire

Control methods are presented that, while not strictly complying with GOST, allow preliminary conclusions to be drawn about the quality of the wire if the measured values ​​differ significantly from the regulated ones. The final conclusion about the compliance of the wire with GOST can be made only after testing the wire in a specialized laboratory using strict methods and in the volumes specified in GOST.

Visual inspection.
The following can be checked: marking, number of wires in the core, color and integrity of the insulation.

Measuring structural dimensions.
The insulation thickness and outer diameter can be checked using suitable measuring instruments. Measuring the wire diameter d pr and calculating the cross-section of the core using the formula 0.785d pr 2 N (where N is the number of wires in the core) is not a strict method for controlling the cross-section of the cores, because confirmation of cross-section compliance is electrical resistance, however, a significant deviation of the calculated cross-section from the nominal (more than 10%) may serve as a basis for doubts about the quality.

Measuring the electrical resistance of current-carrying conductors.
It can be carried out on the finished wire with an ohmmeter with a suitable measurement limit (with a small cross-section and the normal length of the wire in a coil or on a drum can be several Ohms) and recalculated to a length of 1 km. Special attention care should be taken to make good contact with the test leads.