It is not only more cost-effective than the other materials, but also offers very good conductivity. However, copper is not always a better conductor. When we consider power cable material, it is often said that copper is always a better conductor than aluminium, and thus should always be used. In some instances, this is not the case. A number of factors should be considered when questioning which is a better conductor.

Assessing the conductivity of a cable wiring is not always the case of looking at resistivity. It is a combination of a number of things, such as the size of cables and the insulation material. It is said that when high voltages have to be used over long distances, it may be more economical to use aluminium wiring.