General description and main types of wire VVG

Cable (wire) VVG consists of veins made of copper and covered with a layer of PVC. It has a flat shape and in most cases is used for transmission of electrical energy with its further distribution in all kinds of stationary installations. Nominally designed this cord for a voltage of up to one kilowatt. Some brands work even at higher rates. Such a cable can be laid in both dry rooms and in those that have high humidity. Often, VVG wires can be found in special cable blocks, overpasses and even in open space. It should be noted that they can be laid in horizontal, inclined and vertical routes, as well as in places that are characterized by an increased level of vibration. The only place where it is not desirable to lay this cable is under the ground. The main and most common VVG wires are described below.

The VVG-P ng cable structure

Each vein here is single-wire and has a round shape. Its nominal cross-section can be up to 16 millimeters square. Polyvinyl chloride plastic is used for insulation. It should be noted that the shell of individual veins has a different color. The outer sphere is low in flammability and in most cases has a white color. The gasket is recommended to be produced at a temperature ranging from 15 to 35 degrees Celsius and humidity to 98%. This power cable, like its other brands, has a flat design. The characteristics of VVG-P ng wire make it possible to apply it at rather high voltage levels.

Cable VVG-P ng LS

This variety is characterized by reduced fire hazard, and the LS (Low Smoke) encoding indicates that the product has a low level of gas and smoke emissions. Since it does not spread combustion, it is most often used to distribute electrical energy in cable rooms, structures and installations where the variable nominal voltage ranges from 660 V to 1000 V at 50 Hz.

The structure of veins

At VVG-P ng LS wire, the conductor conducting electric current is made of copper and can be single-wire or multiwire. If there are two or three cores in the twist, then they all have the same cross-section, and if four - then the last of them is smaller. It serves for grounding and is called zero. The production of insulation uses a special polyvinyl chloride composition, which is characterized by high resistance to combustion. The shell of each vein has a different color, while zero is always blue. The thickness of the inner layer is not less than three millimeters. It should be noted that the interstices between the strands and the insulation of the polyvinyl chloride composition are filled due to it.

Specifications

Installation and laying of this wire VVG can be performed without the work of preheating at a temperature of at least minus fifteen degrees. For operation, a temperature range of -50 to +50 degrees is permissible. As for non-ignition, for this cable, the limiting temperature of conductive wires is set at a rate of four hundred degrees.