poster

Power Lines (1944)

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.

Released April 8, 1944 16 min None+
16 min
April 8, 1944
Released
NR