I was beginning to setup my new Grizzly jointer/ planer combo in my barn/ shop when I realized I needed to run a dedicated 30amp line. For my 20amp line I used rigid nonmetallic conduit, 40' pull with 3 90 degree bends. What a struggle that was!
This time I thought about using metallic flex conduit, threading it with the three #10 wires (1/2" dia conduit), then putting the line in place. I have three 90 degree bends, but they can be gradual sweeps. Any reason not to thread the wire first?