I realize you're not asking a trick question, but here's a trick answer. Another application of 30 gauge wire is to make stranded wire. For example, 22 gauge stranded wire is typically made with 7 strands of 30 gauge wire!
I asked because I have an old spool of 30 gauge cloth covered solid wire and a spool of 28 gauge plastic covered stranded wire. The stranded roll is silver. I purchased it at a computer show, where I was told it was for wiring backplanes. (Who knows?)
I've used some of the 28 gauge for something or other, I have never used the 30 gauge.
As far as strippers go: After using a friend's, I purchased a set of Klein strippers. I think they work great. I just stripped a bit off of the ends of my spools to see whether they were solid or stranded.