Gasket of armored cable

Electric cable, accused by steel ribbons and protected by a hose from PVC plastic, is called armored. This is a relatively new and very convenient way of laying power grid. Thanks to steel protection, the cable does not threaten anything: neither the ground nor water nor the air.

The body of the armored cable forms one or more conductive current lived various class affiliation. Copper veins or soft wire isolate polyethylene, propylene copolymer or fluoropolymer composition - it depends on what maximum temperature cable will be used. Protective armor, which throws the cable in several layers, is represented by high-strength galvanized wire made of steel.

Positive qualities of the armored cable

The most obvious advantage of this product is increased strength and ability to withstand large mechanical loads. In addition, the following "pluses" of cable protection with special armor can be noted:

1. B.the fused cable is resistant to corrosion and excessive humidity.
2. Long service life - from 30 to 50 years.
3. The product has no special requirements for warehouse storage conditions.
4. The cable is simply mounted when laying the line.
5. It is fine tolerate a wide range of temperatures from - 50 ° C to + 50 ° C. And the maximum allowable temperature for work was 90 ° C.
6. High reliability of the product minimizes all temporal and cash spending on its use and repair in case of damage to the cable.
7. The product is presented in a wide range, which allows you to easily find the desired armored cable to complete the enterprise of any industry.

It would be unfair to default about the shortcomings of this product. Armored power cables are not particularly flexible. However, too sharply the problem is not worth it when the LP is paving for many kilometers. If there is a need for a durable and flexible cable, manufacturers offer a product, which protects the steel single-string helix. With this type of armored cables to electric power supply, industrial and transport equipment are connected to electrical power.

Varieties of armor covering cable

1. Galvanized tapes. Ultrasound armor will protect the cable from a negative mechanical effect, for example, from a shovel blow in the process of riveting trench.
2. Steel galvanized wire. Armor from this material is a reliable protection against the harmful influence of moisture, blows and stretching.
3. Steel corrugated tapes. They strengthen the armored optical cable and telephone communications lines. The steel barrier is a serious obstacle for rodents and mechanical shocks.

Types of armored power cables

The most famous varieties of power armored cable products are called VBBSHB and AVBBSH cables. The cross section of their lived is 1.5 - 240 kV. mm. When the section size exceeds 25 square meters. mm, multi-wire cable veins, as a rule, round or sector form. The diameter of the Armored Cabling type VBBSHB and ABBSB varies: for example, 0.32; 0.5; 1.4; 13.4; 16.7 mm. The cable can be formed by different quantities (from 1 to 5), and in a 4-core product, one of the veins may have a zero value and be less than the other three.

Letter abbreviations that mark the product are indicated:

• B - veins are isolated PVC conductor;
• B - cable protection is represented by sheet armor, which is formed by two steel galvanized spirals. The gaps of the inner spiral in such a design overlap the outer spiral.;
• b - bitumen layer. This feature is in cables with a common cross section lived more than 6 square meters. mm;
• Shv - cable covers an external PVC hose;
• A - the presence in the cable lived from electrical aluminum. When this letter is not in the abbreviation, implies copper veins.

Armored power cable type VBBSHB and AUBBSHV is modified by voltage from 0.66 to 35 kV. Also, both types of products have standard color marking, which denotes phase and zero conductors.

Visible cables WBBSHV and AVBBSH only lived by material. The armored cable copper differs from its aluminum "fellow" higher operational properties, but, at the same time, has a higher mass per unit of conductivity and is more expensive in financial terms. For this reason, the armored aluminum cable has today an extensive scope of application.

Features of the armored copper cable

The armor of the copper power cable is able to protect the product from the effect of the aggressive medium in conditions suitable for mounting the high level of strength cable slots. If you do not expose the armored cable of this type of significant tensile load, it can be almost without restrictions in the open air. The product is separated from the external environment by several steel armored ribbons, purchased into a special PVC hose. Thus, the power copper cable is reliably hidden from rodents and damage to mechanical origin.

Features of the armored aluminum cable

The cable product of this type has no shielding. In the creation of the cable, the conductive current aluminum core with a circular cross section is used. Multi-breed residential use with large sections. Insulation material in this case - plastic from polyvinyl chloride. The cable armor shape, winding galvanized ribbons with a spiral.

Armored cable aluminum, as well as copper, can not be exposed to a large tensile load. With a single cable laying ABBBSV, the burning of it does not apply. The gasket of the armored cable bundles prevents the spread of combustion if the ABBBSN brand cable is used. The location of the product in the abbreviation indicates the letterparther of NG.

Scope of application of armored power cable

In a wide range of armored cables there are products that will satisfy all types of cable systems - these are power cables, communication cables, fiber cables. The high quality of the armored cable guarantees the normal operation of power lines in conditions of bad weather and accidents.

The armored copper cable is paved in rooms and open ground, because the product is often used for laying in trenches, mines and collectors - where high corrosion activity is observed.

Scope of armored aluminum cable - trenches, premises, tunnels, shafts and outdoors.

By the way, the trench mounting of the armored cable is not limited to the house electrical input. The landscape design was greatly popular in the decoration of the household site today, and the armored cable products came here very by the way. With their help, garden lamps are connected, watering pumps, remote stationary electrical installations and other attributes of a comfortable stay at the cottage.

Gasket of armored cable in the ground: nuances

The trench for laying the cable line can be viewed as an alternative to air branch for input to the house. Objectively evaluating the specifics of work, the laying technology can be called a relatively simple, but labor-intensive process.

Before starting work, consider the following aspects of the case:

1. The cable track should be freely spending 220 volts. So, she should not hinder the roots of bushes and trees, pipes of the gas pipeline and other objects. Remember that the intersection of two cables is unacceptable. In addition, the cords cannot be installed in places with an increased risk of mechanical deformation (for example, in parking lots).
2. The cable laying provides for the use of sand or special fibers for creating a pillow, so the depth of the trench in the ideal should be from 75 cm to 1 m.
3. Armored wire is subject to mandatory grounding.
4. If it is impossible to get rid of the bottom of the trench from unnecessary sera in the form of roots or glasses, the problem is solved by filling the concrete or iron pool.
5. The optimal material for creating a pillow - sand, but not a substance that can be combustion.
6. To lower the cable into the trench with the support of the LAP, it is possible to openly, isolate it only at an altitude of 2.5 m from the surface of the Earth. In this case, in this case, the VGP tube with a diameter suitable to the external cable diameter is taken.
7. If the layout plan provides for a location in one trench of several armored cables, the distance between them should be at least 10 cm.
8. When connecting the armored cable from the LPP and the consumer, use special terminal clutches. They do not pass inside moisture and prevent the destruction of the protective shells of the cable.

How to pave the cable: phased instruction

Important! Before direct operation, make up a detailed layout of the armored cable. The scheme should be certified by the Territorial Service for Electricity Control.

1. Prepare a cable to laying, thoroughly checking the integrity of its surface along the entire length. All detected damage isolate. If there are many more, it is better to buy a new cable so that you do not threaten the closures and voltage drops. Remember the increased rigidity of the product: In order not to damage the cable, install it on the rolling, pre-secure the drum on goats. Work only with a whole cable, the stitched cord for laying into the ground will not fit.
2. You have to have a master plan of a plot that will allow you to evaluate the overall picture of your chosen location - you must be sure that any engineering communications are laid underground. Drop the trench at least 70 cm into depth, and the width of the pit should be sufficient for free cable location. The gasket of the armored cable in the pipe from steel or asbestos cement is carried out in places over which the driving part is located. The diameter of the protective pipe should be at least 10 cm.
3. Put the sand pillow on the bottom of the pitted pit.
4. Place the cable in the trench. The product must lie by waves, flexing freely (without tension).
5. From above on armored cable you need to pour at least 10 cm of sand. Then close the sand pillow with a red brick, distributing the signal tape over its surface. This little trick will protect the cable from random deformation during extraneous earthworks.
6. Put the trench with a soil (15 - 16 cm) and wipe it well.

When an armored cable is laid in the land of the country area, the price of this event depends not only on the size of the cable: its magnitude also affects the cross section, brand and general characteristics of the product. The cost of laying the cable in the ground can vary from 5000 rubles and higher.

Gasket of armored cable: video