If you are running 10ga why would you ever use less than a 30a breaker on a
motor load?

BTW
If this was a test question the correct answer would be min14 ga wire and a
max40a breaker.
(long story but it is on the inspector's test)
hint: you can use 310-16 at the full rating on a motor not 240.4(D), O/C device
can be 250% of FLA and round up to next breaker size.

I guess the real answer is "what do the instructions from the manufacturer
say?"