Talk:Copper-clad aluminium wire
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Current Carrying Capability
The 1/6 current carrying capability seems extremely unlikely given that raw aluminum retains over 1/2 the current carrying capacity of raw copper. The citation is needed and proof should be provided as to how the interaction between the materials reduces the current carrying capacity to significantly less than the sum total of the materials, especially given that manufacturers generally specify higher current carrying capacity than raw aluminum. — Preceding unsigned comment added by 198.91.200.145 (talk) 03:29, 22 August 2017 (UTC)
Mains Cable
No mention yet of CCA's use in mains cable, where it removed some of the downsides of ali cable, but not all. Tabby (talk) 21:20, 7 December 2007 (UTC)
Manufacturing Method
Please would someone knowledgeable add details of the manufacturing method of CCA ? Many thanks ! Darkman101 (talk) 00:37, 12 July 2013 (UTC)
I have no idea. For very thin copper clad probably electroplating is used. For thick copper clad, I guess the seamless copper tube is formed then molten aluminium is poured into while keeping copper above the melting point of aluminium. 2A02:168:2000:5B:DF15:960F:8DBD:5598 (talk) 19:18, 8 September 2020 (UTC)
Update: I looked a bit. The big wires are made by taking a preformed aluminium wire and a copper strip. Then the strip is wrapped around the aluminium to form the outer shell. It is basically forming a tube around the aluminium. It is pretty fast process. Either straight or helical form can be used for copper strip around central aluminium core. A pressure is used to close make it seamless. 2A02:168:2000:5B:DF15:960F:8DBD:5598 (talk) 19:21, 8 September 2020 (UTC)
Advantages over bare aluminum?
I know that CCA is sometimes used as cheaper fake copper, but why clad it in copper for e.g. domestic mains voltage? Does it reduce corrosion or improve mechanical properties? Uncoated aluminum wire does exist and was or is used in some regions, so why coat it at all? --92.200.156.56 (talk) 08:39, 6 June 2021 (UTC)
- As the article mentions, without a citation, the idea was to use copper clad aluminum wire to avoid the oxidation effect of aluminum in screw terminals of wiring devices. This caused quite a lot of trouble with residentil wiring until wiring devices were changed to improve connections to aluminum wire. Needs a citation, I'll see what Google turns up. --Wtshymanski (talk) 18:53, 8 June 2021 (UTC)