Back in 1973 my cousin's house in Kearns had a fire. Seems the receptacle behind the drapes sparked and caught them on fire. It was traced to aluminum wires. I, being the electrician in the family, was enlisted. I discovered that all the switches and receptacles were connected to aluminum pigtails, but the devices were rated for copper only. We couldn't afford to gut and re-wire the house, so I pig-tailed all the Al wiring with copper, splicing with Scotch-Locks, Penetrox and Tape. I used Scotch-Locks because they were more flexible than Wire-Nuts. I taped to keep moisture out. There have been NO problems since. (31 years) Looking at the UL approved Al/Cu spring-nuts, I see that their design is similiar to mine.
Earl
