Kraig- the note about insufficient wire size isn't a myth. In higher-power electric motors, any limitation of input current causes a drop in input voltage. In synchronous AC motors, this causes the motor to 'drag', which causes the windings to demand more current (at the lower voltage), and they get pretty darned hot. Submersible pumps are "usually" cooled by presence of water jacket, which keeps the entire assembly's temperature stable, but the windings will get points of very high temperature, either melting the shellac insulation or burning windings open. The other thing that happens, is that a capacitor-start synch. motor will never get up to correct operating speed, hence, will run continuously on the starting capacitor. Eventually, the capacitor exceeds it's duty cycle, and burns out, causing the motor to just growl and draw current. I've repaired quite a few motors that killed starting caps, just by swapping out the starting cap and burnishing the changeover contacts (if they existed), but fried windings are fried windings.
Using heavy gauge wire (ESPECIALLY over long runs) cures that problem in a hurry. Also- same holds true for DC motors (and motor-gens)... if you've got a lame connection or bad cable, your motor's brushes will take a royal beating, and the motor will be weak.
Another (unrelated, but interesting) note, is that it's not unusual for a circuit breaker to blow with no apparent overload... if the wire connection isn't solid at the breaker's terminals... the breaker is thermally-operated, and heating of the wire as a result of the terminal not being tight... will cause the breaker to trip... in the same realm as weak wiring. How's the song go... "Loose Wires... Cause Fires..."
On to real news- I'm enjoying a nice few days working here in Hornell, NY... already visited one cubber, flying back home tomorrow to resume work on my marine railway... and to get my NEW (to me) loader installed on Loader-Mutt!!! Yippeeee!
The bummer is... no internet at the hotel... so I can't check mail or forums much... :-\