Numerous household appliances and electric tools are connected to the home power supply network, and considerable load is placed on electrical wiring. That the electrics has sustained loadings and has served not one decade, it is important to choose electrical wiring cable correctly.
Instruction
1. Making the choice between aluminum and copper wires, consider the fact that the first are cheaper, however concede to the last on characteristics a little. Aluminum wiring has the smaller durability and conductivity, crumbles at excesses quicker, than analog from copper, is oxidized, interacting with air. Copper wires are stronger, durable and reliable.
2. When choosing wire pay attention to such characteristic as cross-sectional area. The ability of wire to maintain certain loading depends on this indicator. Choose wiring with section as equal 6; 4; 2.5; 1.5; 1; 0.75 mm. If you after all have preferred aluminum wire which has low conductivity, buy that with section indicator, the highest on unit, than from copper analog.
3. Getting cable for premises, be guided by special wires of the following types: PVS, VVG, VVG with marking of "NG" and NYM. The PVS connecting wire consists of the copper veins twisted among themselves and protected outside by PVC cover. His main merit – pozharostoykost, that is lack of ability to extend burning at single laying. The wire of PVS is used under repair premises, for connection of electrically operated hand tools and devices. In the conditions of the correct operation such cable will serve not less than 10 years.
4. The VVG powerful cable is capable to maintain tension ranging from 0.66 up to 1 kV. At operation of this type of wiring, environment temperature variation from "minus" to "plus" fifty degrees is admissible. The main cable core can be made both of aluminum, and of copper. Cover and isolation – from PVC. Stacking the VVG-cable, it is necessary to consider that bend radius should not be less than six diameters of cross-sections. VVG wire with marking of "NG" has non-combustible materials as a part of cover that allows to use with success it at increase in level of electric safety of object.
5. The reliable NYM cable is supplied with layer swept - rubber isolation which reduces risk of its damage during the work to non-standard conditions. For increase in electrical safety the cable is supplied with outer jacket from plastic compound. NYM wire with success is applied during creation of network of electrical wiring in premises. And here on the street and laying in crude concrete this type is not suitable for wiring.