musty wrote:
Hi,
I need a little bit of info about the wire sizing for upgrading a
10 hp motor to a 15 hp motor. The present system uses a 30 amp
protective circuit. The 15 hp motor is rated @ 23.7 max amp. The wiring
is 8 gauge. Please tell if a direct swap in motors is likely. nb the
voltage is 3 phase 460 volts.

Unless very high startup current, sounds fine for the wiring itself.
Will need to get starter "heaters" sized for the new motor, probably,
though.

Is wiring copper or aluminum? How long a run?