Originally Posted by JRnTX
We've made two trips in our new Wildwood 27RKSS. In each campground, it seems we either trip one leg of the breaker at the pole or, trip one leg of the breaker inside the trailer. Sometimes, only the A/C is running.
The first campground, the breaker at the service pole kept tripping every 30 seconds or so on the 30 amp service. Used a 50 to 30 adapter and only tripped one side of the breaker, once. On this trip, outside temp was 97/99.
The second trip which, ended yesterday, the breaker at the service would trip if, the A/C is running and we tried to use the microwave or, the A/C and a floor fan.
The question: If the trailer is rated at 30 amps, shouldn't be able to run more than just, the A/C at one time?
2016 Wildwood 27RKSS
2016 F-250 4x4
It does sound like you are possibly just simply overloading the circuits, as RV'ers with 30 amp campers do have to learn what can be on (and what must be off) at the same time to not trip the circuit breakers. Each 30 amp RV is a little different in this aspect, and some can use more than others without tripping the breakers, even though they are supposed to be the same.
Your A/C is your biggest energy user, followed by water heater electric element and microwave. In the winter time, space heaters will consume up many amps.
It's basically kind of additive math, and circuit breakers are really designed to run continuously at 80% rated load. A 30 amp circuit is really designed to carry around 24-25 amps for long periods of time but can carry more in shorter periods.
Now for the math. Watts = voltage X amps (ex 1440 watts = 120 volts X 12 amps)
I used that example because if your water heaters 1440 watt element is on, then it is consuming 12 amps in itself.
Say your A/C is using 13-16 amps. then there is 25-28 amps just with those two. That is before you add amps your converter needs to run the 12 volt stuff, your fridge if on 120 volt AC, and ANYTHING plugged into an outlet. Haven't even added the 1000 watt microwave in either.
I always suggest the following two articles by Mark Polk as good reading which explains amp draws and converter function:
Basic RV Electricity - RV Information (RV Maintenance)
RV Converters and Amp Draw - RV Information (RV Maintenance)
I also recommend the Suburban water heater tutorial, which explains amp draws too.
Suburban's electric switch and much more
As I stated each RV is a little different, and each pedestals breakers are a little different depending on how weak they may be from others doing like you and tripping the breakers. In the summer I cannot run the A/C and microwave in my RV at the same time (even if the water heater is turned off of electric)...but many other members here can.
Hope this helps, and it's this simple and you don't have an electrical problem.