If everyone knew that then there wouldn't be such a large market for it, would there?I'm a little bemused by this
Aluminium wire is crap, everyone knows that - and what's with the 'oxygen free' rubbish, that's just a marketing term used by HiFi advertisers to con the gullible.
That wasn't the reason, there is a lot more of that wire used in the application as it was selected based on specified conductivity. HOWEVER, galvanic corrosion and thermal stresses introduced by dissimilar metals in heat generating electrical contact are not in the wire specs and appear to be significant. Notably I am seeing levels of corrosion across all the CCA installations which imply it's probably best to avoid using it in PWM apps.That length of wire of that cross section should be <5 mΩ in aluminium, and <3 mΩ in copper. At 6 A the heat dissipated should be <0.2 W with aluminium and < 0.1 W with copper.
Anyone who is trying to save fractions of a penny on 5 cm of wire by using CCA instead of copper, or who is trying to hide that the wire is cheap by using CCA which is fatter for the same resistance, isn't going to be making the connections properly. It could also be that the wire had been bent too much on installation, and aluminium would crack strands more easily than copper.
What makes you think there is?If everyone knew that then there wouldn't be such a large market for it, would there?
No, but we probably have the worlds best electrical system - which probably explains the lack of aluminium wireLots of producers/suppliers = demand:
The U.K. doesn't represent a sampling of the World markets.