When accomplishment infield often necessary electrification garage, workshop, baths and arbors. You also need to connect the lights in the courtyard. Draw a line from home to your destination can be underground.
This option is good that the electric wires do not spoil the view. But will have to dig a trench, lay not cheap special cable with a protective cover. It will take a lot of time and money. More accessible way - the line laying in the air.
Especially for electrical cables in the air
Under this option, the electrification of farm buildings should bear in mind a number of adverse factors:
- negative temperatures in winter;
- the probability of formation of ice on the cable line;
- UV exposure with sunlight;
- considerable heating wires in the hot weather.
Because of their exposure to the cable insulation condition worsens, she cracks. What is fraught with wiring circuit and fire. Therefore, each line should be protected by a separate circuit breaker. And do the cables must be laid in the ripple and pipes.
The choice of materials
It is known that connect homes to power lines made with the help of SIW. His transcript reads as follows: self-supporting insulated wire. It does not need any additional supporting ropes, as it is already neutral conductor comprises a steel core.
But to use the SIP cable with aluminum conductors for the electrification of outbuildings uncomfortable. To be able to connect the high-power electrical appliances need to use cable cross sections that is 10 square meters. mm or more.
Have difficulty connecting terminals, sockets and switches. In addition, the weight of the cable will be significant, so you have to use more expensive hardware.
So it is usually used for such needs cable VVG. Its copper conductor cross-section of 2.5 or Q4. mm able to withstand considerable loads. But, as already mentioned, it is necessary to provide for the protection of the cable insulation from unfavorable factors.
This is usually used flute with the necessary flexibility and durability. For street pads recommended for use of corrugated polyethylene. Usually it has a black color. Gray flute made of PVC, which does not tolerate the sun UV and strong temperature fluctuations.
How to reach the wiring through the air?
And VVG cable and corrugation have insufficient load-bearing capacity. Therefore, they attach to the cable, a pre-stretched between two buildings. If the distance between them is more than 20-25 m, recommended for extra support. Otherwise, the cable will be much sag and sway with strong gusts of wind. As a result, all may result in sudden rope breakage and damage to the cable.
Galvanized steel wire can be purchased at any hardware store. Preference should be given to products that have a protective polymer shell. This cable will serve longer. Also need articles for tensioning cable: hooks or turnbuckles.
When the cable is attached and tensioned, attach it to the cable in the corrugation using plastic clamps. The cable should be solid and not connected to two or more parts. This will prevent unexpected problems with it. Especially that the elimination of failure in such circumstances would require much time and effort.
After pulling the cable only to have the right to remain its outbuildings in the junction box, and hold the line to the sockets, switches and light fixtures from it.