During construction, one of the important issues is the introduction of electricity into the house.
Conducting electricity is considered a responsible event, on which the internal operation of the network depends, the quality of operation of electrical appliances, heating and fire safety at home.
Input methods: the underground method and by air are allocated. For outdoor installation, the most suitable wires are SIP 2 * 16 or 4 * 16, and for intra-house VVGng-Is 2 * 6, 4 * 6, 4 * 10 or 2 * 10. The choice will depend on the installed total power consumption of the building.
Note: The abbreviation SIP is translated as self-supporting insulated wires.
These are modern safe assistants when conducting electricity.
If we compare outdated electrical cables, in which there was no insulation, and self-supporting insulated wire, then undoubtedly the latter are more reliable and differ in a large number of advantages.
Previously, in the production of electrical cables, insulation was not provided at all, since in those years there were no materials that could withstand heavy loads for a long time while on the street. Which naturally resulted in big problems because the wires are fixed on the support insulators and must maintain the required inter-core distance. Because of this, the design turns out to be cumbersome.
And with a strong wind, it is not uncommon for wires to overlap and break, which naturally leads to short circuits and, at best, a simple lack of electricity.
SIP is completely covered with insulating polyethylene material.
Advantages of self-supporting wires:
Note: For the electrification of households, four or five self-supporting insulated wires are often used, having the same cross-section on the veins equal to 16 square millimeters.
Due to the fact that there are special one-sided piercing clamps, the conductors do not need protection, and using the hex head the clamps can be adjusted.
Materials that will be needed for direct connection to the walls of the building:
How the self-supporting insulated wire will be carried out along the outer wall of the building depends on the material of execution.
Note: The most convenient and safe entry of wires is considered to be using corrugations or plastic boxes. If the building is made of fire-resistant materials, then the cable can be laid open along the wall.
With the air method, a branch is performed from the nearest power transmission line support to the household, which should be no further than twenty five meters.
If at a greater distance, then an additional post will be required here. The conductive wire must run below six meters.
Anchor bracket is used when connecting the wire to the air support and the structure. Important: According to safety standards, brackets are attached to the house at a level not lower than 2.75 m from the ground. This is followed by the introduction of wiring into households.
SIPs are excellent for outdoor use, but they are not suitable for indoor ones. That is why experts recommend making a shield outside and connecting them to a different cable.
Also, the presence of an electrical panel outside will protect against voltage surges. The panel has a grounded circuit breaker. It is placed in a protective box, which should be positioned so that the self-supporting insulated wire falls below with a margin.
In the shield, the SIP cable passes into another one that goes into the structure.
Note: It is advisable to wrap the self-supporting insulated wire going to the electrical panel in a corrugation. Also, in the place where it passes through the wall, place the wire in a steel tube. This will serve as additional protection. The VVGng cable is most suitable for conducting from the street panel into the house.
Note: The abbreviation VVGng stands for vinyl-vinyl-naked non-flammable, provided for voltages - 220-380 Volts and 660-1000 Volts.
Unlike SIP, it is narrower, has greater flexibility, service life is up to thirty years, does not lend itself to combustion and has a two-layer polyvinyl chloride coating. Through a metal pipe, it is introduced into the wall of the house, and inside it enters the electrical panel. The electrical panel serves as the distribution of electrical energy throughout the building. It is installed in a plastic or metal box, which can be fixed both on the wall and placed in a niche.
Inside it is a DIN rail that houses the entire automation system.
The electrical panel is the main element of the internal distribution of electricity, from which it is distributed throughout all rooms.
This method is considered the most common today. This is largely due to the minimum impact of precipitation on the wire, protecting it from gusts and fires, and they also do not affect the appearance of the structure
The scheme consists in lowering the cable, enclosed in a metal pipe, down the support post. A trench is pulled out from the pillar to the building to a depth of at least 0.
8 m. The cable passing through the trench is placed in a plastic or metal pipe, it is better that it be armored. Further, the trench is filled up.
Electrification of a house by an underground method can be performed by 2 methods:
In the first method, an electrical cable, hidden in a metal pipeline, is routed to the outer shield.And in the second through a hole in the foundation.
Here the cable is hidden in an armored pipe and led to the location of the electrical panel.
Introduction of conductors with aluminum conductors into a wooden structure is strictly prohibited. Since, conducting such wires through a combustible structure is not allowed.
Here you need to make a transition to a copper conductor. The most suitable cable is VVNng.
Important: When aligning these wires, do not use ordinary twisting, but rather use a terminal box. Because when copper and aluminum materials are directly bonded, they can react and oxidize. And as a result, a spark may appear at the point of alignment, even with a small load, which is a direct path to fire.
Also, the cable through a wooden wall should be routed using a heavy-wall steel pipe, the diameter of which should be four times the outer cable.
It is advisable to make the connection with a slight reverse slope to prevent water inflow inside.
The entry point will need to be sealed with asbestos, rubber or plastic plugs.
If the entry into the wooden dwelling is carried out from the post through the foundation, then the situation is somewhat different, since the structure is not combustible. Here attention is focused on the room into which the cable goes - dry or wet.
Which input method to choose will depend only on your desires. Each method is good in its own way - the air method is lighter, but it is more reliable underground.
Posted By: Work Style |02, Nov 2020
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Posted By: Work Style |01, Nov 2020