Aluminum wiring concerns

Looking for some info on solid-conductor aluminum wiring used for a 240v circuits in older homes.
I have not been able to find much info on this.

Homes built between 1965 and 1972 that use #6 solid-conductor aluminum for a 240v circuit, does this wiring experience the same issues as #12 solid-conductor aluminum for 15-20 Amp circuits? Is there cause for concern and is this something you call out or mention in your report?

Information I have read indicates aluminum wiring post 1972 is considered to be the “newer” type alloy that does not experience the same issues at the older (pre-1972) aluminum wiring. Is this accurate information?

If it’s single strand, I’m writing it up. It’s going to the subject to the same type of thermal expansion (though likely far fewer cycles than a circuit serving a refrigerator for instance) and oxidation.

I wouldn’t phrase it that way, but the newer alloy is considered less prone. I may be able to tell when a house was built, but not when the wire was manufactured, so I don’t try to differentiate in a report. I always shared the CPSC article with the clients.


Thanks Chuck.