How do I connect a stranded wire to a bus bar?
I sell a lot of stranded wire and I've never heard of anybody tinning a wire that goes on a neutral or ground bar.  AFGI &amp; GFCI breakers come with stranded copper and is rated to fit into these bars, along with solid.  I would just make sure the hole you are using matches up with the wire you are using.  Most of the ground and neutral bars have different size lugs with different size ratings, like 14 to 10 awg, or 14 to 4 awg or 6 to 2/0 awg.