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Aluminum wire used before the mid-1970s had a somewhat higher rate of creep, but a more significant issue was that the same high price of copper driving the use of aluminum wire led to the use of brass-coated steel rather than solid brass screws for terminations at devices such as outlets and switches.
A mechanically rigid connection system is required to hold both halves of a B2B motionless (often impossible). Wire to board (W2B) connectors tend to be immune to fretting because the wire half of the connector acts as a spring absorbing relative motion that would otherwise transfer to the contact surfaces of the W2B connector.
Aluminum conduit, similar to galvanized steel conduit, is a rigid tube, generally used in commercial and industrial applications where a higher resistance to corrosion is needed. Such locations would include food processing plants, where large amounts of water and cleaning chemicals would make galvanized conduit unsuitable.
Au 5 Al 2 typically forms at 95% of Au and 5% of Al by mass, its melting point is about 575 °C, which is the lowest among the major gold-aluminum intermetallic compounds. AuAl 2 is a bright-purple compound and a brittle, its composition is about 78.5% Au and 21.5% Al by mass.
The disadvantages of aluminum wiring lie in its mechanical and chemical properties. It readily forms an insulating oxide, making connections heat up. Its larger coefficient of thermal expansion than the brass materials used for connectors causes connections to loosen. Aluminum can also "creep", slowly deforming under load, which also loosens ...
Connectors are produced in different materials such as Brass, stainless steel, [15] Aluminum and plastic. Their design and configurations vary from miniature and high-density [ 16 ] signal and power connectors to compact, rugged, sealed and hermetic seal connectors made to withstand extreme conditions, such as low and high temperatures ...
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