The electricity cables we have in our homes are made up of three smaller wires. These are normally made from copper, because it’s a good conductor, and covered with a plastic sheath to insulate the electricity current.

This clip is from:
Bitesize Secondary, Science 1
First broadcast:
28 February 2008

Can be used to introduce the concept of conductors and insulators and why some materials conduct electricity. Students could then plan an investigation to find which materials conduct electricity and those that don’t.