The construction of a small private house and a large industrial facility is not without the supply of electricity. The most advanced solution can be considered an armored cable for laying in the ground, which solves many problems of classical air or combined wiring on simple VG type cables in a metal pipe.

• Something about couplings

What are the advantages of underground wiring?

Our homes and apartments require the organization of the power supply system of the required capacity. Their nutrition is organized due to the external line in one of three ways that differ in the complexity of installation, maintenance / repair, as well as the price:

1. Air. The easiest way in which the supplying wire flies through the air from the nearest LPP. Most often used simple lived sections without isolation or with it, for example, VG;
2. Underground. A more modern, reliable way, in which the approach to the house is organized by the trench with the laying of insulated cables in the ground directly or in the protective tube. It has a greater complexity of execution and subsequent maintenance / repair;
3. Combined. This option combines areas with air and underground (in a pipe) with a gasket in the presence of complex conditions for the location of the LAM, terrain. Accordingly, the most expensive, time-consuming option for installation / repair.

An option with an underground gasket is more modern, has obvious advantages over a classic airport:

• First, the laying cable in the ground can be selected with a loan to the desired section or even with a margin, because it does not have to take into account its sagging;
• Secondly, the ability to use the minimum number of input devices;
• Thirdly, the price of an underground line arrangement may be below the air;
• Fourth, when compliance with the technologies of laying cable to the ground, you can forget about it for many years, without resorting to repair;
• Fifth, this option is simply aesthetically aesthetically, since the line does not hang in the middle of the yard, does not block the space.

Marking and basic types of cables for underground lines

Despite the obvious advantages, laying the cable to the Earth is conjugate with no less obvious problems:

• The possibility of mechanical damage to the line when conducting earthworks;
• Wintering cable in winter when sufficiently complied with sufficient trench depth;
• Damage to the wire rodents;
• Violation of the integrity of the compounds in the absence of special couplings;
• The complexity of the repair of the cable line.

Avoid this when using classic PVC cables with insulation, for example, the VG, it is possible if you lay them on a metal pipe. An alternative to this was an armored cable, between the isolation balls of which an additional metal layer is present.

Visual and practical differences of the enhanced Cable WBBSB from simple WDG can be seen in the following illustration:

To save money for electricity payments, our readers advise "Energy Economy Electricity Saving Box". Monthly payments will become 30-50% less than before the use of the economy. It removes the reactive component from the network, as a result of which the load is reduced and, as a result, consumption current. Electrical appliances consume less electricity, the costs of its payment are reduced.

The following main types of cables in the ground, differ in the amount of core, a combination of insulating, armored layers are used.

Subtleties selection of cables in the ground

As mentioned above, the cable gasket into the tank allows you to not focus on its mass and pay more attention to the required power that can be selected with a reserve, to the extension perspective. It is determined at the calculation of the total load of all existing consumers (household appliances, devices, etc.), and also depends on the material and the minimum cross section of the vein.

Sequence of laying underground power cable

Put the introductory line into the trench, regardless of which cable is used armored or simple VG, it is necessary in two main stages:

1. Preparatory;
2. Mounting.

The purpose of the preparatory phase is to develop, coordinate the project to enter electricity, as well as digging the tranny on the markup. It has a section in shape resembling a trapezium expanding to the top. The depth must be at least 80 cm on the household plot (lawn) and 125 cm on areas with a road surface. The foundation width of the trapezium depends on the number of cables that need to be laid, branch / connecting couplings, maintenance / repair solutions. It fluctuates from 35 cm to 1 m.

The finished ditch is cleaned of third-party objects, garbage, and then placed on the bottom of the sand pillow with a thickness of up to 10 cm. After that, measures are being taken to arrange a branch coupling, reinforcing pipes. On this preparation is considered complete and you can start directly laying the cable to the ground.

In the process of laying it is necessary to avoid tight, forming a wavy line. If in separate areas is predicted from pipes, they should already be in their place. In the trench, the cable has a whole length. If this does not work, then it is necessary to use special connecting / branch couplings.

With parallel laying of several wires, the minimum distance between them is complied with 10 cm. The laid cables fall asleep from above the 10-centimeter sand layer, and even above the ground pillow. Places where you need to lay the cable to the ground are denoted by a special signal tape.

It is necessary to organize the grounding of the armor, check its resistance, in order to avoid short circuits.

Something about couplings

Protective coupling will help protect the most vulnerable sections of underground wiring

Depending on the type of object, the required power, internal power grid, the connection of cables of different sections and directions may be required. Obviously, the contact site will be the most vulnerable from the point of view of integrity, and therefore, more than others are subject to repair. To protect this site, special couplings are used.

The clutch can have a stationary body (at the top on the illustration) with bolted fasteners, filling compound or manufactured from thermoplastic materials, followed by crimping connectivity. The specific option depends on the type of cable (VG, VBBSHB, PVBVNG, etc.), its cross-section, power.

As we can see, laying an armored cable to the ground can solve many practical and aesthetic issues on the commissioning of electricity to the house. This method is more reliable, has a relatively smaller price, does not require the use of protective pipes (this is a necessary condition when using a simple power cable of the WG type).