Copper-clad aluminum wire, commonly abbreviated as CCAW, is a conductor composed of an inner aluminum core and outer copper cladding. In Science and engineering, a conductor is a material which contains movable Electric charges. WikipediaNaming Copper (ˈkɒpɚ is a Chemical element with the symbol Cu (cuprum and Atomic number 29
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Uses
The primary application of this conductor is for high-quality coils where weight is an issue, such as the voice coils in headphones, portable loudspeakers or mobile coils in other applications. A coil is a series of loops A coiled coil is a structure where the coil itself is in turn also looping A voice coil (consisting of a Bobbin, Collar and Winding) is the Coil of Wire attached to the apex of the cone of a Loudspeaker Headphones (also known as earphones, earbuds, stereophones, headsets) are a pair of small Loudspeakers or less commonly a single For the Marty Friedman album see Loudspeaker (album A loudspeaker, speaker, or speaker system is an electroacoustical
CCA was also used in mains cable for domestic and commercial premises. Electrical wiring in general refers to insulated conductors used to carry Electricity, and associated devices The copper/aluminium construction was adopted to avoid some of the problems with aluminium wire, yet retain some of the cost advantage. Aluminum wire is a type of wiring used in Houses and power grids. It is not used today in domestic 240v installation wiring.
Properties
The properties of copper-clad aluminum wire include:
- Lighter than pure copper
- Higher conductivity than pure aluminum
- Higher strength than aluminum
- Better solderability than aluminum, due to the lack of the oxide layer which prevents solder adhesion when soldering bare aluminum. Electrical conductivity or specific conductivity is a measure of a material's ability to conduct an Electric current.
- More expensive than a pure aluminum wire; cost relative to pure copper may be hard to establish due to the volatility of copper prices.
Skin Effect
Although 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 sufficiently high frequency, the skin effect is too weak at audio frequencies to be of importance in typical applications of copper-clad aluminum wire, the skin depth generally being greater than the radius of the wire (about 0. The skin effect is the tendency of an alternating electric current (AC to distribute itself within a conductor so that the current density near the surface of the An alternating current ( AC) is an Electric current whose direction reverses cyclically as opposed to Direct current, whose direction remains constant Skin depth is a measure of the distance an Alternating current can penetrate beneath the surface of a conductor. 6 mm at 20 kHz in both Cu and Al). The primary benefits of cladding aluminum with copper rather than vice versa are solderability, as described above, and manufacturability, copper being a metal that can be electroplated with ease, unlike aluminum.
The skin effect is of greater importance in copper clad steel, due to its use in high frequency applications such as coaxial cable, the lower skin depth in steel, and the greater difference in conductivity between the core and the cladding. Copper clad steel, also known as copper covered steel or by its acronym CCS, is a bimetallic product mainly used in the Wire
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