The manufacture of wire and cable is completely different from that of most electromechanical products. Mechanical and electrical products are usually used to assemble the other parts, a plurality of components and then assembled into a single product, the product by number or number of units measured. Wire and cable is based on the length of the basic unit of measurement. All wire and cable from the conductor processing began, in the periphery of the conductor layer after layer of insulation, shielding, cable, protective layer and other wire and cable products made. The more complex the product structure, the more layers are superimposed.