According to my handy dandy Square D motor calculator the below are the specifics for a 5hp single phase 230v motor.
Full load current 28 amps
Minimum copper wire size #8 awg
Thermal magnetic breaker 60 amp
#8 wire is good for 50 amps
#6 wire is good for 65 amps
#4 wire is good for 85 amps
Normally wire is sized at 125% of max load. 28 X 125% = 35 amps.
Wire it properly, you will sleep better.
Last edited by 302/Z28; 04-18-2005 at 12:28 PM.