They state that the earth ground cable connecting ground to the neutral wire inside the transformer is a feedback path for electrons. From that information I would conclude that without it the circuit would not be complete and current wouldn't flow. Then they follow by saying that the use of a ground cable is a safety measure. I have read that in other forums that no current normally flows through the earth ground cable unless there is an emergency situation such as a voltage spike. These are contradictory statements.. I think this will answer my question. If we were to take out the earth ground wire, would all the circuitry would still operate? I am thinking yes, the circuits would still operate because there is the neutral and -120V lines that always act as return cables back to the transformer. It would just be more dangerous without the earth ground cable. Right??