splicing aluminum to copper elec wire

frankwp wrote:
Are you sure it's aluminum? That would be highly unusual. It's probably tin plated copper.

Thanks everyone for your input. I am kind of anal when it come to stuff like this.

I looked at the wire closely and it sure looks like aluminum but on the wire I found AWM style 3321 which is tin plated copper so I don't have the problem I thought I had.

The oven is at my home and it is a built in oven. There is a very heavy three conductor wire sticking out of the wall and that is how the old oven has been hooked up for 35 years so I guess going back the same way will be OK now that I know it is not aluminum.

Thanks everyone for taking the time to respond. There is a wealth of knowledge available on the site and you are willing to help. This is why I asked the question here.

The oven came wit an armored pigtail with 12 ga wire and it was not intended to be changed.

Thanks again