The cable may be different from the cable? It's just copper(Ideally) core and some rubber insulation around. Unfortunately, not so simple, because both the insulation and conductor, can cause problems.
Material
Currently completing the installation of electrical networks, whether at home or facility of production are used almost exclusively copper wiring purchase you can here https://sokol.energy/provod-i-kabel. Aluminum disappearing. This is due to several factors, better conductivity of copper and smaller losses in energy transmission, to a longer period of use.
During the so-called "yield stress" of copper is about 20 years old, this means that the change in structure of the material begins to occur gradually after about 20 years of operation. It is natural that for the passage of the life of the network settings become worse. therefore, especially in older networks require periodic study of the effectiveness by periodically measuring electrical parameters.
Problems faced by each
The vein section and
It is time to discuss two major problems, cable-connected. The first relates to fraud "producers" over the cross section of the cable. Very often, for example, instead of the cable 3?2,5 mm2 can be sold with a section 3?2,1 mm2. Of course, not so that the light does not light, a microwave oven does not heat up food. The fact that the wire is designed for a different voltage, ie for other tasks, so it accelerates wear tremendously.
0,4mm2 wiring difference in diameter causes, that instead of the cable section which should be about 4,9mm2 it is only 3,46mm2, ie 30% less. And this is a lot of, taking into account the duration of use.
Attention! If you want to make sure that the cross section is such an important aspect of, make the following experiment. Buy the cheapest cable, one meter, and connect the vacuum kettle and the oven. When you feel how warm it up you will realize that it is not suitable for your needs.
How to determine the section of the cable?
The easiest way to measure the digital device, but unfortunately not everyone has it. The second way is to measure the caliper,. A third method is by inserting wires into the holes indicated by section, for example when she lived with the stated section of 2.5mm2 are very easily enters the hole of the same diameter, this means cheating, and if the extent is difficult to match the declared value.
material conductor
The second problem is fortunately much rarer, This problem veins, that is, it is not made of copper and it is only covered. The truth of this type of cheating is rare, but it is worth remembering, that can be reached by a metal coated with copper.
Insulation
Another problem concerns the insulation of the core, ie "rubber" around it. It can occur in basically two potential threats:
- Accelerated aging of insulation, made of low-quality rubber, then the electrical system will lose its settings even before, how to lose it lived;
- Too thin / weak isolation also affects the measurement and durability. Worth buying cables, character designating 500V / 750V instead of 350V / 500V. The second most often found in supermarkets.
Wiring does not change every year. So it pays to buy good cables, to have peace of mind for more than a quarter of a century. It's not just a question of reliability, but also security. The prospect of saving on the wires does not seem a particularly smart idea. Yes, there are certainly its supporters are building with Chinese materials entire houses, but experts say, there are things which are not worth saving.
If you are building, renovating or equip any object using a construction services company, ask about the wiring of the manufacturer they use. If these are well-known brands that are described on the Internet, then you can be calm. But if the wiring from east(China), the experts can except to wish good luck as it surely you will need.
In concluding this topic, worth mentioning again about electrical measurement. Yes indeed, thus the state is checked by setting. each installation, Even made from dubious in quality materials, immediately after putting it into operation(if inserted in accordance with the rules) will fulfill its task. About the quality of materials, can only say with trouble-free and reliable use. But experts recommend periodically perform measurements at least for their own safety, because such measurement is not only a study of the state of cables, and in particular overvoltage protection. In other words, the measurement must save the possibility of electric shock in unfavorable circumstances.
