Kiwi,
How did that work out in the end?.
I was researching a thing for a mate of mine to do with generators when I thought of this thread.
He is looking to permanently wire a 4000kVa generator into wiring with remote start and stop wiring.
It was the transfer switching that caused me to bring this topic back up again.
I suggested an Appliance Inlet with cord-set.
I couldn't remember if the Neutral had to be broken or not at the transfer switch.