Cables are most widely used electronic equipment in the power industry as a transmitter of energy. Generally, the main part of the cables are conductors and insulation. The difference between cables types are in their application.
For the operation of the cable, select the cross section is important. In Electrical network, cable length that fits voltage drop is a particular operating considered.

Today, a large part of the energy distribution in the power industry, especially in the low voltage carried by cables. Of course, for energy transfer medium and high voltage also in some cases of special cables are used. Application of cables in electrical installations are wide and should be comply with the technical principles.