The electrical cable. Definition and composition.
An electrical cable is a conductor or set of them coated by an insulating or protective material, used to transport electrical energy, generally.
The best conductor of electricity is silver. However, due to its high price, it is usually used copper or aluminum. The latter, although it has an electrical conductivity of 60% compared to copper, is more economical and lightweight. So, it is ideal for overhead transmission lines for electricity in high voltage networks.