Question

When insulated copper cables are substituted by aluminium wires should be thick. Why ?​

Answer 1

Answer:

because the copper have under aluminium wire so the wire can contain critin

Answer 2

When it was first introduced on the mainstream scale in the 1980s, copper was a significant improvement compared to aluminum wiring with its high conductivity. Since then, copper wiring has become a golden standard for homes. Aluminum used until the 1970s in home wiring was not the same as the modern aluminum alloys; it did not adhere to the modern safety standards and had a profound tendency to overheat.

Copper wires were a significant improvement compared to this. They are still used today because the conductivity is superior, even though the safety concerns related to aluminum have long been resolved, for the most part.