Let's talk about 3 phase feeders (NO neutral) on a aluminum ladder in a factory. When grounded properly.....when hot wire touches ladder....we pop the breaker. A live cut high voltage line on the ground is another good example....how does it return to the generator at the electric company? I'll buy that it travels all the way back thru the earth to the power company......but how exactly does it get back into that generator?? Or how does it get back into the magnetic field or coils or generator. If the generator is grounded that's not going to help because the chassis of the generator is insulated from the windings. Or perhaps they are using a Y configured generator and they just ground the Y similiar to a center tap transformer? Don't know if that makes sense or not. Someone said the Earth just absorbs it....but I'm not buying that. I have asked several intelligent people this question....but still no exact answer. Anyone?