The other night I had to wire a double oven to an existing box that had 6/3 (with ground) AL wiring. Thought it would be easy - just get some wirenuts at Home Depot rated for Al and Cu. They don't sell them. Everything was Cu to Cu. They sold the Al anti-oxidant, but no connectors to use it with.
Next plan: Install a plug and receptacle (NEMA 14-50). But all of the instruction books packaged with them said Cu to Cu only.
Then I looked at the receptacle itslef, and stamped in the metal it said Cu-Al 75C. So that is what I went with. Does anybody see a problem with this?

Thanks,

Steve.