Plugging into shore power.... Buzzing noise

mtrumpet wrote:
falconman, I'm pretty sure that what tropical36 is referring to is......Many gassers (my previous as well) didn't even have a transfer switch. When you were plugged into shore power, the power (obviously) went into the coach electrical system. However, when you unplugged from shore power, you merely plugged the shore power cord into an outlet (typically located in the power bay) that was wired directly to the generator. You could then run the coach on generator power. (The generator became the source of power as opposed to the shore power pole.) It was a very simple but effective system. Much easier to maintain and no expensive transfer switch to deal with. Frankly, I sort of liked it.

You got it and not any different than having more than one source of shore power to choose from. Unplug from one source and plug into the other, whether it be from the shore or another gen set. I've even plugged into a remote 1000watt generator when dry camping for saving noise and fuel, when just wanting to charge the batteries or for other small loads.
Just don't get it with these transfer switches and would be the first thing, I'd throw away if it went bad at all. Maybe in the beginning even, as it just might go bad at the wrong time and in the wrong place.
I mean you get yourself a 50amp range outlet from Home Depot (or maybe camping world in the case of a 30amp) and connect it to the output leads of the gen set. Connect the shore power cord to the coach main breaker box. After that, you should be able to choose either power source. Like I said and with some rigs, you may have to do something with the rear air generator circuit, like adding a 15 - 20amp relay of sorts.
I'd have to see the transfer sw., but first thought would be to use the empty unit for a junction box to house these connections.