Originally Posted by
RealHJ
Yes. But the solution is simple, and very cheap. Just use a Manual Transfer Switch. It is purely mechanical (think a lever you pull down), so it has very low chance of failure. And certainly not all many 100s of them are going to fail at once. Downside is then the duty electricians would need to go and switch the MTSes to switch the load over.
You still have a single switch. In ATL the room containing the switch was on fire. Melted transfer switches do not operate, and wires with melted insulation also do not work very well. Even in the non union South, I am sure there are safety regulation prohibiting electricians from entering burning rooms to flip manual switches. Please correct me if I am wrong about this.