Is aluminum wire legal at all? Since they quit using it in the 70's, it was still used after for panels, ranges, and such. Why would it be allowed for that with all the problems they had with it and still do. I have done so many loose connection repairs over the years with aluminum. Is it less likly with the larger sizes to cause problems, I wouldn't think so.. Can you still buy it?
I always buy copper, haven't checked if aluminum is still sold in the larger sizes.
