Less than a week and I've already had my first major screwup.  I hooked my trailer up to 220 using a double 30 amp breaker instead of a single 30 for 110.  I'm pretty sure I've blown something (or maybe a lot of somethings) with this little mistake.  I'll go to the store tomorrow and see if I can get the correct breaker to see what all's gone bad.  I checked the breakers and fuses in the trailer box and everything seems okay, but when i use my adapter none of the lights are working nor the range fan.  They worked fine before.  The fridge and A/C seem to be working for now.  I knew I should have called a professional like my wife said.  What a complete mess...

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You probably blew the 12 v. system out in the inverter/converter with hooking up 220v into it,,,Hopefully you have a breaker on your inverter converter...

It sounds like you blew a Power Fuse or if more modern, tripped an AC breaker that feeds the 12 volt DC converter or at worse the DC converter it's self. In my old rig, the lights, fans( including the furnace, range hood fan and bathroom fans are all 12 v DC as well as the fresh water pump) I have the old buzz box converter and it is protected on the 120 AC input side with the old paper fuse that you have to pull and read with a meter to tell if it is blown or not. Hope things work out for you and remember it's always going to be something so take it easy on your self.

Damage depends on the year of coach and what got turned on. A switch mode converter will blow. A ferro resonant or a linear on the older coaches will probably survive. If the ac got turned on while hooked to 220, it's probably toast. Usually a linear converter will just pump out 24 volts and toast the circuit boards on the 12 volt side. Got a pic of the converter?
Well I can't believe it, but everything seems fine. Not a single blown fuse or bulb or anything. As soon as I got the single breaker in and cut it on the AC ran fine. All systems look good so far after about 20 minutes of running. Can't show a picture of the box right now cause I'm on my phone but it's an older "Underwriters Limited" Series 6300A Model 6332. They seem to make a quality product cause it took 240v for a couple minutes and lived to tell about it. Pretty lucky so far...
That a magnetek linear. Get a test light and look at the label inside the door. It will show the ground lug. Ground the light on the appropriate lug and test the supply side of the fuse block, the top row.




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