In article , "Wade Lippman" wrote:
The problems are just with "improperly" installed 12 and 14 gauge. The
heavier stuff is still in common use and causes little problems, though it
is prudent to make sure the connections are still tight every now and then.

Actually, *any* improperly installed aluminum wiring is hazardous, regardless
of its guage. And of course the same is true of copper also.