Copper-clad aluminium wire
This article needs additional citations for verification. (June 2021)
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 and cable television distribution cables; and power cables.
CCA is also seen in unshielded twisted pair networking cables. These cables are often less expensive than their full-copper counterparts.
The properties of copper-clad aluminium wire include:
- Less expensive than a pure copper wire
- Lighter than pure copper
- Higher electrical conductivity than pure aluminium
- Higher strength than aluminium
- Electrical connections are typically more reliable than pure aluminium
- Typically produced as a 10% or 15% by copper volume product
The skin effect causes alternating current to concentrate on the more-conductive copper cladding of the conductor, causing the resistance of the wire to approach that of a pure copper wire at high frequencies, which makes the copper-clad aluminium wire a good fit for such applications. The skin effect is also utilized in copper-clad steel wire such as RG-6 coax, which is also commonly used in high frequency applications with high strength requirements.
- John R. Free, Clad Metals:They're Moving Into Your Home, "Popula Scince", December 1971, page 12-13