Sorry Gorge! I sent you my post as a PM hit the wrong button.
We all went in to left field and left Scott standing all confused! Probably made him even more confused!
Scott this is how to figure out the size of the circuit you will need for your camper.
The light bulb and switch:
The switch does not draw any power. The light bulb is ratted in watts you need amps. To convert watts to amps: divide watts by the voltage in use.
Example: 100 watt bulb 110 v.ac = 0.9 amps.
Light bulbs and frying pans are resistive loads and that is the total current the devices will use.
Your AC and refrigerator have motors in them and have an inrush current that may or may not be on the ratting plat. There should be a running current and maybe a starting current ratting. If there is no starting current ratting you can do a guess to the starting current by this method.
Take the running current and multiply it by 0.7 then add that to the running current that gives you the starting current. It will be close to the real starting current.
Assuming the AC runs off of 110 v ac!
Example: AC running current 6.2 amps starting current will be11 amps.
Ref running current 4.6 amps starting current will be 8 amps
To figure the amperage needed you just have to add all the currents like this.
Light bulb = 0.9 amps
AC start = 11 amps
Ref start = 8 amps
Total is = 18.9
So a 20 amp supply will work with every thing turned on if you plug in to the power pole at the campground.
The running current will be 12 amps, this will give you 8 amps lift over for TV and other appliances plugged in to the duplex outlet.
If you are not using the AC you then can use things like a frying pan at 1000 watts and a coffee maker at 700 watts. You just have to be careful not to use more than the 20 amp supplied by the power pole.
I hope I didn’t make thing even more confusing.
Chuck