Wire size help...

[DRJDVM's '69]

So I'm brand new to welding so I was looking for some info.



I'm taking classes at a local trade school and just purchased a Miller 175 to use at home. I'm not planning on anything of significant structural integrity until I get alot of practice, so most of my stuff will be sheet metal (floor pans, patch panels, brackets etc). I do plan on making an engine cradle and a body cart too, so there will be some structural stuff but nothing on the car itself for now.

So.... the Miller came with a small roll of 0.024 wire and contact tips 0.023 and 0.030....

So from a practical standpoint... which wire sizes and contact tips should I have on hand for these kind of jobs ????

In other words, what wire size and contact tip goes with which material/job ???