Originally Posted by Derrin
Yeah, this is true. It's over voltage that'll kill it. In A/C motors you can ruin them by not supplying enough current.
Whoops!!!! let me correct myself! You can ruin an A/C motor by supply less voltage than it requires, not less current. Less current will just pop the circuit breaker. Less voltage demands more current via ohms law and therefore fries the field windings.
I was thinking about this and it didn't sit right after I posted it, so I did a little looking and it has to do with using long extension cords that are not large enough gauge wire. The voltage drop can cause the motor to fry itself because it demands more current to run.
All of this has to do with A/C line voltage motors and nothing to do with stir plates so my apologies for posting