The rated loss rate of cable is 1%, the cable consumption is 1%, and 2.5% is the wave form, bending and radian coefficient. Take BV- 1.5 as an example: 100+ 13.9 (reserved line length)+1.
The wire and cable products used in power system mainly include bare overhead wires, buses (bus bars), power cables (plastic cables, oil-paper power cables (basically replaced by plastic power cables), rubber cables, overhead insulated cables, branch cables (replacing some bus bars), electromagnetic wires and wires and cables for electrical equipment.
Quality appraisal:
First, look. See if there is a quality system certificate; See if the certificate is standardized; See if there is a factory name, address, inspection stamp and production date; See if there are any trademarks, specifications, voltages, etc. Printed on the wire. It also depends on the cross section of the copper core of the wire. Superior copper is bright and soft, otherwise it is inferior.
Second, try. It is advisable to bend the end of a wire repeatedly by hand, and those with soft hand feeling, good fatigue strength, high elasticity of plastic or rubber hand feeling and no crack on the conductor insulator are excellent products.