Aluminum wire will vibrate with the frequency of the signwave. In this case, 60hz. This causes it to loosen from any connections other than solid crips. When it loosens, you get arcing at the connection. It's also is soft so it will loosen up over time. You need to retighten at least every year.
Al wire is not compatible with copper and cannot be connected together without special al/cu connectors. They do make a grease for this also.
Al wire must be sized larger than copper for current carrying capacity (usually one size bigger eg; #10 copper you would use #8 al.)
A lot of trailers use al and older homes. They used a special al/cu outlet for this purpose. Inserting copper blades from the plug has no effect. You can plug most any connector wire into an outlet with no problem. Just because the conductors are al doesn't mean the plug connector is. It is usually copper(or an alloy.)
Al wire is not compatible with copper and cannot be connected together without special al/cu connectors. They do make a grease for this also.
Al wire must be sized larger than copper for current carrying capacity (usually one size bigger eg; #10 copper you would use #8 al.)
A lot of trailers use al and older homes. They used a special al/cu outlet for this purpose. Inserting copper blades from the plug has no effect. You can plug most any connector wire into an outlet with no problem. Just because the conductors are al doesn't mean the plug connector is. It is usually copper(or an alloy.)