I have done a little testing and I'm still a bit confused. I took the cover off the electrical box that I presume is for a generator output (at front of trailer adjacent to cargo area where a built-in genny would reside).
I determined that the red button on the cover is a circuit breaker (30a). All 3 wires are terminated in this box with wire nuts.
I removed the wire nuts carefully separating the wires and plugged into shore power. Interestingly, using my VOM the wires at the front of the trailer (presumed generator box) become hot with shore power.
I am hoping to use this connection to energize my trailer from a newly installed Xantrex 2000 inverter. The box is located only a few feet from my inverter and it would be very easy to make a cord to go from this box to my inverter output plug. I realize I would have to turn off the converter and other loads that I want to isolate when running the inverter. I don't dry camp that often so this isn't a big deal to me.
Since the wires in the generator/inverter box get hot when I plug into shore power, I assume the shore power plug will become hot if I energize the circuit from the generator/inverter box. I can make a dummy receptacle to plug the cord into to protect from shorts or shock.
Now I'm really wondering what the 30a receptacle is near the shore power cord box. I have a call into Northwoods (Arctic Fox) and am waiting for a call back.
Has anyone used this method of energizing the trailer from an inverter? Is there a better way for me to accomplish this?