In cables with XLPE insulation for medium and high voltage «\» symbol indicates section of the screen in square millimetres. It is regulated by Technical specifications according to which the cables are made.
See the table of analogues of XLPE cable.
The maximum overall length of the cable depends on the design and cable manufacturing technique. At one reel can be several cable lengths. For some cables, the maximum length is stipulated by the capacity of the reel.
It depends on the class the higher the class is, the greater is flexibility of the cable. Flexibility of the cable depends on the number of twisted wires.
It all depends on the model of the cable and manufacturing technique. Total period of impregnated paper-insulated cable manufacture comprises 30 days; cables with XLPE insulation – from 30 to 40 days; General industrial cables – up to 20 days.