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Old 07-17-2005, 12:54 PM   #1
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We have a faulty circuit breaker in our 5th wheel - a combination 30 amp main breaker and a 20 amp A/C breaker. The 20 amp breaker is the bad one but whole thing must be replaced because it is a single unit. Not luck finding that combination at two 2 RV parts departments. Found one at Lowes that is a 30-30 and one that is a 20-20.

The question is: Since the 20-20 is not big enough for the main breaker, can we increase the A/C breaker to use the 30-30? Would that be a problem or should we search the internet for a 30-20?
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Old 07-17-2005, 12:54 PM   #2
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We have a faulty circuit breaker in our 5th wheel - a combination 30 amp main breaker and a 20 amp A/C breaker. The 20 amp breaker is the bad one but whole thing must be replaced because it is a single unit. Not luck finding that combination at two 2 RV parts departments. Found one at Lowes that is a 30-30 and one that is a 20-20.

The question is: Since the 20-20 is not big enough for the main breaker, can we increase the A/C breaker to use the 30-30? Would that be a problem or should we search the internet for a 30-20?
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Old 07-17-2005, 01:21 PM   #3
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Stay with the 20/30 the brteaker is there to protect the wiring.going larger may turn the wire into a toaster wire.
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Old 07-17-2005, 02:20 PM   #4
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Do some searching on the internet for them. You need to get the part number from the CB for the search. While not easy to find, they are commercially available parts. You might also try your RV manufacturer. Do not oversize the breaker.
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Old 07-18-2005, 05:47 PM   #5
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Make sure the 20 Amp. is bad. I was at the National and had a service tech tell me the same thing. He didn't have one, so we went on our way. When we stopped for the night I switched the Air conditioner with the microwave both 20 Amp.. I found out the microwave would work but the air would not. I had a bad starting Cap. on the fan motor. I replaced the cap. and everything as good as new. The problem was low voltage at the campground as my plug was melted also. I have since got a meter to check the voltage. The campground still said he had no problem even after the service tech told him he did.
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Old 07-19-2005, 07:12 AM   #6
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Thanks for all the info. We checked out the A/C and everything was working. The parts department for our local RV dealer was not helpful even though the manufacturer said they should offer to order the part for us. Found a web site and ordered exactly what we needed - should be here in a couple of days. We'll be "on the road again" in no time!
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