Well that's certainly more in depth than I've learned since I stated flying it, but you can burn up electrical components with under amperage. I had to look it up, but the poster would have to know that the current amperage demand is under 150 if the apu is running, plus what the engine gen is producing at the time the GCU allows it pass through. Or he'd just be relying on circuit breakers popping. Granted it would have to be under a heavy draw. I apologize for an impolite comment regarding his knowledge, but a successful engine start with gen switch on in no way validates it as harmless. Even with the GCU monitoring volts and hertz.