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Old 03-20-2017, 04:28 PM   #11
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Originally Posted by F.R.O.G.;1449214
There's no advantage or disadvantage to plugging into a 50-amp plug, so you might as well not bother with the adapter.

There's a pretty good non-technical explanation at [URL
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Old 03-20-2017, 04:48 PM   #12
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There is really only one reason to use a 30 to 50 amp adapter on a 30 amp RV and that is to avoid a tired 30 amp receptacle and a worn 30 amp pedestal breaker. I have a 50 amp coach that really only needs 30 amps most of the time (single A/C). The cable, however, is wired for 50 amps and I generally use it when available.
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Old 03-20-2017, 06:18 PM   #13
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Originally Posted by F.R.O.G. View Post
If you find the situation of a weak 30-amp breaker, it won't hurt to use the 50-amp side, but I'd quickly report the breaker to the park manager as well.
Yeah, good luck with that. We were at a park at Big Bear Lake, CA where the 30A receptacle was worn so that it was open ground. No 50A at this spot and the park management was clueless. They have to call an electrician for this so I got by with the 20A and an adapter. Not a big deal.
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Old 03-20-2017, 07:00 PM   #14
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A few times camping with my ac and water heater running I kept tripped the 30 amp breaker on the pedistol. I plugged in my 50 amp adapter and never tripped the 30 in the camper. I would have to say there is an advantage to running off of 50 amps.
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Old 03-20-2017, 07:09 PM   #15
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A few times camping with my ac and water heater running I kept tripped the 30 amp breaker on the pedistol. I plugged in my 50 amp adapter and never tripped the 30 in the camper. I would have to say there is an advantage to running off of 50 amps.
the only explanation for that would be a weak breaker in the pedestal and/or a bad pedestal receptacle that generated a large voltage drop when both were running. You weren't drawing much more that 30 amps or the breaker in your AC panel in the RV would have tripped.
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Old 03-20-2017, 07:12 PM   #16
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Even though your 30 amp breaker in your power center SHOULD trip, your cable is only rated for 30 amps. It will melt before the 50 amp breaker will trip. I wouldn't think that would be very likely, but just wanted to point it out in case you had a dead short before the load center (critter eating the insulation and wires on your incoming power feed).
I agree.

Here is a photo of a camper that was using a 30 amp extension cord in addition to the OEM cord. It kept tripping the 30 amp breaker on the pedestal. They moved the extension cord with an adapter to the 50 amp service and the camper was "happy" not seeing more than 30 amps; the 50 amp breakers were "happy"; but the connection between the cord and the extension cord was not "happy".
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Old 03-20-2017, 07:15 PM   #17
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This just may be me but I have found at times the 50 amp side of things seems to be more stable when allot of folks are running things like ACs. I always use a surge guard at the pedestal so there is no way I will overload my 30 amp cord.
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Old 03-20-2017, 07:18 PM   #18
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I used to use the 50 amp to 30 amp all of the time. The 30 amp plugs at Goshen for example are loose and will cause the end of your plug to either weld into the outlet or fall out. Resistance in a connection will cause heating. My 30 amp breaker in my trailer was replaced due to tripping with a higher curve model. I do check all connections for heating and also clean them often. I also carry a temp gun and Fluke clamp on ammeter.
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Old 03-20-2017, 07:24 PM   #19
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This just may be me but I have found at times the 50 amp side of things seems to be more stable when allot of folks are running things like ACs. I always use a surge guard at the pedestal so there is no way I will overload my 30 amp cord.
The surge guard is not a breaker. It prevents voltage spikes, it will not prevent an overload. Only the pedestal breaker or RV breaker protects for overload.
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Old 03-20-2017, 07:31 PM   #20
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I do have to check mine I though it also had over amperage and voltage features in it.
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