15 amp plug is rated at 15 amp MAX
Your Roof AC will pull about 12 to 14 amps HI COOL at 95 degrees ambient. Subtract 1 amp for each 10 degrees below 95 degree ambient
Your refer will usually pull 2.8 amps (2 door RV refer)
Your POWER CONVERTER (people forget this appliance) will pull 1 to 3 amps depending on how many 12 volt appliances and lights you have on, but usually 1 amp.
Your M/W will pull anywhere from 8 to 11 amps depending on the wattage
Forget the "bar" fridge.
Remember, these are 30 amp RV's and you want to attempt to run on 50% of the needed amps to run your RV
The Compressor on the roof AC is the big amp draw. There is only about 1 amp difference between Lo fan speed and hi fan speed.
If you give me the model number of your Roof AC and the refer, I can give you exact amp draws. The refer amp draw I posted will be within .5 amp draw of what I posted (2.3 to 2.8) \
Then TV's and other items(Coffee maker/Skillets and anything that plugs into a wall receptacle add up.
On 15 amp service, it is NOT advisable to run a RV roof AC at all because you will be using all available amps just to run the AC unit. The MINIMUM required 120 breaker INSIDE the RV for a RV AC is 20 amp. Doug