Is there a reason why wires are solid copper or strands of copper?

Question

I noticed that wirings have different kinds wires inside the rubber coating. Does it make any difference in terms of transferring electricity or being solid or strands have its own purposes?

In: 7

Answer 1

Solid is cheaper, stranded is more flexible. Solid is used more for permanent, non-moving fixtures, stranded for movable cords. They both conduct the same.