I'm pretty sure I didn't ask whar I needed to run my whole camper. Actually I'm more than sure I specifically said I'm running my refrigerator only. According to the sites provided, 12g is fine for what I need. ThanksCircuit breakers do not protect against low voltage, only over amperage. The cord will fry before tripping a 30a breaker.
A camper with 2 ac units will be a 50a 120v unit, not 240vac.
A microwave averages 1000-1300 watt draw, a roof ac unit can pull a lot more.
Plugging in a 30amp rv plug into a standard 15a duplex receptacle is just a bad idea all around for anything more than keeping the fridge running.
A 12ga wire will not support 30 amps.
a 30amp 240vac breaker can be broken off to 2 30a 120v lines, it is 30a per pole, either way it will melt a 12ga cord before tripping the breaker.
DO what you want, you asked for advice and it was given. I will stand by a 12ga cord (or 12ga romex) of any length being well undersized for a camper.
My bad, I see what you mean, I took a look at the camper and it is a 30 amp 115 volt plug. I thought it was a 240V plug with two 115 volt feeders.