Hey guys thanks for the input. As far as code is concerned I was going to upgrade to the 50A cable and go to a box rated for 50A with a 50A double breaker for the two legs. Then run the existing 30A off of a 30A breaker in the new box and then a 20A and a 15A off the other leg. I think this should be safe and meet code. I don't want to do anything to start a fire or electrocute someone.
Anyway, you guys answered a question I had decided to pose, which is, how many are using a washer/dryer and Air conditioning with just 30 amps? I guesss the main reason I was thinking of going to 50A was the problems I had last summer with breakers tripping. The real culprit may be low voltage because of poor wiring in the campgrounds. When the campgrounds would fill up my breakers would start tripping so I wasn't sure if I should try to add more energy using appliances.
The Duo-therm air-conditioner uses 12.9 Amps @ 115 volts = 1483.5 Watts. The Splendide WD2100 uses 13 Amps @ 120 volts = 1560 Watts (Website says 1300 Watts). If these numbers are real then the A/C and W/D together will use between 2783 Watts and 3043 Watts which leaves me with 600 to 800 Watts to run the converter and other miscellaneous loads. The key is I'll need to have dependable voltage of 115 - 120 volts. Maybe I just need to get a 30A Hughes Autoformer and leave the wiring alone.
Gruffy - Do you ever have problems with breakers tripping due to low voltage?
I appreciate your input