Wire brand PV 3 1 × 6 is widely used in industry and everyday life. Serves for laying in electrical installations, lighting networks and power networks, for connecting electrical mechanisms, machines, equipment. A feature of the cable is its ability to withstand various bends and turns, vibration loads.
Content
- Decoding of marking
- Design features
-
Specifications
- Mechanical features
- Electrical parameters
Decoding of marking
When getting acquainted with the PV 3 1 × 6 wire, you need to understand its abbreviation. Although it may seem that everything is quite simple here, in practice there are some nuances. Conductor marking is deciphered as follows:
- P - wire.
- B - vinyl insulation, also called polyvinyl chloride.
- 3 - flexibility class.
- 1 - single core.
- 6 - conductor cross-section diameter in square millimeters.
All of the above was true until 2010, until a new standard, GOST R 53768—2010, was adopted. In accordance with it, serious changes have taken place in the marking of wires, and now PV3 should be called PGV. This abbreviation stands for the following:
- Pu - installation wire.
- G - flexible.
- B - vinyl insulation.
Until 2010, it was customary to call conductors with a low flexibility indicator, the installation wire, and the rest belonged to the installation wire. Now all wires are installation wires, and a special symbol has been introduced to indicate their flexibility. And also the new abbreviation may contain additional information, for example, the fire safety class, if any. The letters are followed by numbers in the range of 0.5-95, indicating the cross-section of the vein.
Design features
Pvz wire 1 × 6 has one core made of copper. To increase the flexibility index, it is made of several wires twisted together. In the manufacture of a conductor with a cross section of up to 35 mm2, according to the standard, the core must have at least seven separate wires. It is on their section that the class of flexibility depends.
Another important point in the PV-3 design is the insulation thickness. However, with this everything is quite simple and this indicator must necessarily correspond to the values from the table given in GOST. And also it is worth paying attention to the color of the insulation layer. The standard assumes the use of eight colors, but at the request of the customer, the color of the surface of the insulating layer can be changed.
Specifications
Knowing the design features of the PV-3, one can proceed to the question of its characteristics. They can be conditionally divided into two types - mechanical and electrical.
Mechanical features
This group should include not only physical and mechanical indicators, but also resistance to aggressive environments, durability, terms of Use. One of the mechanical characteristics of a wire is its flexibility. The maximum possible bend radius is in direct proportion to the PV-3 diameter. In accordance with the standard, this indicator should be at least 10 outer diameters of the conductor.
Other mechanical characteristics of the wire include the following:
- Operating temperature range - from -50 to +65 degrees. At the same time, the PV-3 installation can be carried out only with an indicator of -15⁰С - + 35⁰С.
- The service life is 15 years, but if the conductor does not come into contact with corrosive media or air, then this parameter increases.
- Flammability - depending on the location of the wire, this indicator can be important. Today on sale you can find products that are not capable of sustaining combustion and even belong to the group of self-extinguishing wires.
Electrical parameters
The wire serves primarily as a conductor of electric current. Therefore, one should in no way forget about its electrical properties.
In this matter, special attention should be paid to two parameters:
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Resistance is regulated by the standard, and all nominal values can be found in the corresponding table. It is important to remember that when performing independent measurements, they should be carried out at a temperature of 20 degrees. For PV-3 1 × 6, this figure is 3.3 Ohm / km. - Insulation resistance - during manufacture, wires are subjected to high-voltage tests, during which the ability of the insulating layer to withstand operating voltage for a long time is tested segment. With regard to the wire in question, the indicator is 5 megohm / km.
Another parameter that is paid attention to when choosing a conductor is the maximum current load when laying through the air and in the ground - 59 A. For more information on wire characteristics, refer to the relevant standard.
