I might be sticking my foot in it here, but if I am, we'll all benefit from it.
I don't feel that this installation would comply with 430-53. Part (a) would require the branch circuit to be protected at not over 15 amps.
Part (b) the smallest rated motor is not protected per 430-52 & table 430-152. 300% x 3 amps = 9 amps which would require 15 amp fuses (see standard sizes 240-6).
You might be able to comply with part (c) or (d), but it would depend on what you're using as a controller.
If all motors don't run at the same time, going to 15 amp fuses looks about right. Otherwise, this installation would have to come into compliance with 430-53(b) or (c) or (d).
[This message has been edited by Tom (edited 09-09-2001).]
Few things are harder to put up with than the annoyance of a good example.