COMPARISON OF THE ELECTRICAL CHARACTERISTICS OF ALUMINIUM AND COPPER

Aluminium and copper are the two most used metals for electrical conductors. The table below compares their characteristics.

Al and Cu CONDUCTORS

This comparison points out that:

Although the specific electrical resistance of aluminium (2.8 μΩ/cm) is 1.6 times higher than that of copper, an aluminium conductor requires a diameter only 1.3 times bigger for an equal linear resistance.
The specific mass of copper (8.9 Kg/cm3) is 3.3 times higher than that of aluminium (2.7 Kg/cm3). So, for identical linear resistance, an aluminium conductor will be twice as light as a copper conductor.

Comparison Charts

Comparison Al and Cu

Comparison Al and Cu

Comparison Al and Cu