Power Lines 80 years old

The manufacture of cables for transmitting electric power is shown. Copper bars are rolled and drawn into wire, which is twisted into strands, and covered for insulation and protection with layers of rubber, lead, cloth and paper. The completed cables are then given high-voltage tests before being dispatched from the factory.

Credits

Power Lines Cast

Name	Character
Norman Shelley He was 41, 77 years old when he died	as Commentator (voice)

Power Lines Crew

Name	Department