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Old 06-16-2020, 06:28 PM   #1
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30 AMP - 2016 27' Flying Cloud FB

Our RV => 30 AMP 2016 27' Flying Cloud FB with 1 A/C Unit

Is it logical to plug into a 50 AMP source and assume that it's ok to run the microwave and A/C unit at the same time?
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Old 06-16-2020, 06:33 PM   #2
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the pole breaker will be 50 amps but the main in your trailer's power center is 30A. The A/C draws 15 amps and the microwave under 10 amps so you should be ok if your batteries are 85% or more charged so the converter is not drawing a lot


Do you generally find you can't run the A/C and microwave at the same time?

Edit: You will have to keep your water heater off or on propane at the time but the refrig at about 3 amps should be okay.

Edit2: an easy but not exact way to confirm charge level is to note voltage. If it is 13.2-13.6 it is likely not drawing much from the converter.
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Old 06-16-2020, 06:33 PM   #3
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No. When you plug the 30 amp cord into the 50 amp adaptor you only get one leg and 30 amps. The 50 amp cord and box has 2 legs. 30 amp trailer connected to 50 amp box works just like a 30 amp connected to a 30 amp box. Plus your main trailer breaker is still 30 amp

Our microwave seems to draw a lot more than 10 amps when we run the generator. Our trailer has the AC/microwave selector switch so I have never tried the 2 together.
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Old 06-16-2020, 06:46 PM   #4
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Perhaps you have a powerful microwave. I show the modern microwaves all on a 15 amp breaker 2016 and newer. Mine pulls a wimpy 10 amps on high

Edit: FYI the 50A service is actually two 50A split services or 100A total, so if you plug a 30A cord into a 50A service you do have one leg 50A capacity at the cord.
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Old 06-16-2020, 06:48 PM   #5
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Thank You

Thank you for the responses and for educating me. I wish I was technically inclined but I appreciate there are others like you both that can educate me here.
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Old 06-17-2020, 09:17 AM   #6
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Should work (just) assuming you are using a dog bone to connect this will reduce down to 30 amps
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Old 06-17-2020, 09:24 AM   #7
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Just to add to this, my microwave draws almost 15 amps, a big surprise to me. I never run my A/C and microwave at the same time. In our use I sort of have a rule about only 1 big appliance at a time, with our 30 amp trailer, meaning A/C, microwave/convection oven, water heater(electric), or hair dryer. There could be some wiggle room, but I do not intend to use it.
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Old 06-17-2020, 10:56 AM   #8
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Quote:
Originally Posted by Frank&Mike View Post
Our RV => 30 AMP 2016 27' Flying Cloud FB with 1 A/C Unit

Is it logical to plug into a 50 AMP source and assume that it's ok to run the microwave and A/C unit at the same time?
The breaker is there to protect the wire.
So you're in no danger of tripping the breaker in the pedestal, but you may trip the breaker inside your trailer, the main.
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Old 06-18-2020, 11:34 AM   #9
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Another thought, may be a good idea to check your voltage when pulling large loads.
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Old 06-18-2020, 01:10 PM   #10
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My microwave is a replacement microwave from Lowe’s and shows 15 plus amps on the portable EMS readout. Maybe Airstream ships a smaller unit.

I gave an internal breaker that runs either the microwave or the ac. It sometimes trips on the microwave when it starts.
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Old 06-18-2020, 02:38 PM   #11
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It is "hillbilly chic", but if your pedestal has a 15/20 amp plug, you can use a heavy duty extension cord as well as the 30 amp cord. Run the plug thru a window or your fantastic fan, or perhaps thru your under bed storage door and hook up the microwave or hair dryer to it. Use the shortest cord.that will reach. I have seen two people who successfully used an auxiliary air conditioner in the back window on their secondary cord.
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