Historical information

Differing gauges of transmission line was/is used in the Kiewa Hydro Electric Scheme. Some carried 330KV, 220KV, 66KV (Mount Beauty to Bright) and (Clover to Mount Beauty) and 22KV.
All the cables have a core of steel for strength and an aluminium outer layer for transmission. Examples include 66KV copper cable, copper earth wire from the towers, copper cable found along the aqueducts for telemetering and copper earth wire.
The 24 Volt Communication cables were/are used for linking different sites on remote SEC equipment.

Significance

The State Electricity Commission of Victoria constructed the Kiewa Hydro Electric Scheme during the late 1930's to 1960's.

Physical description

A wooden board with samples of differing gauges of transmission cables used for the transmission of power and 24 volt communication cables used for communication linking different sites on remote S.E.C. equipment. The cables No.s 1 to 9 have a core of steel for strength and an aluminium outer layer for transmission.
The copper cables No.s 10 - 14 are used for earthing and are in the ground as copper doesn't rust or corrode (steel does). Copper is three times heavier (dense) than aluminium.
Each of the outside aluminium wires are wound in the opposite direction so that when the cable is stretched under load, they tighten.