Copper-clad aluminium wire, commonly abbreviated as CCAW or CCA, is an electrical conductor composed of an inner aluminium core and outer copper cladding.

Uses:

The primary applications of this conductor revolve around weight reduction requirements. These applications include high-quality coils, such as the voice coils in headphones, or portable loudspeakers; high frequency coaxial applications; such as RF antennas; CATVdistribution cables; and power cables.

CCA was also used in electrical wiring for buildings. The copper/aluminium construction was adopted to avoid some of the problems with aluminium wire, yet retain some of the cost advantage. But, solid copper is most commonly used in internal residential 120v or 240v wiring in the US.

CCA became extremely popular in emerging markets as a cheap replacement for copper category 5e twisted pair cables.