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Old 01-29-2016, 11:09 AM   #1
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Is 50 Amp power better than 30???

My Rockwood runs on 30 Amp power. If given the choice, should I use the 50 Amp plug with a 30 Amp adapter for a more reliable power supply to the RV? I've heard people say this a more constant 30 Amps than the 30 Amp plug which may fluctuate, and at times be less than that.
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Old 01-29-2016, 11:11 AM   #2
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I did on my last 30 amp unit.
50 outlet 30 amp adapter


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Old 01-29-2016, 11:17 AM   #3
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I think the bigger benefit is that the 50A socket gets used (and abused) less, so will make better contact then the 30A one may...

A 30A circuit is designed to be used to 24A (80% of rated OCP) - A 50A circuit will have more available power; so if you're pushing the 30A to it's max, there may be an advantage to using the 50A.

Last thought - 30A trailers are more common, so depending on how the posts are wired, there may be more load on the 30A "side" of things, which could lead to less stable power - but that's very much dependent on how the park and post are wired.
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Old 01-29-2016, 11:25 AM   #4
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A Good 30 is all you need! 50 A adds nothing to your 30 A service! Youroo!!
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Old 01-29-2016, 11:48 AM   #5
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Quote:
Originally Posted by youroo View Post
A Good 30 is all you need! 50 A adds nothing to your 30 A service! Youroo!!
The key word there is GOOD!

True, a 50 amp outlet (through an adapter) won't allow your 30 amp rig to utilize any additional power that a correctly balanced, properly wired 30 amp outlet will... but in the real world, those pristine 30 amp'ers seem to be fewer and farther between.

I'll always take the 50 amp outlet if available.
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Old 01-29-2016, 12:02 PM   #6
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When In Nashville last year I was plugged into 30 amp, about noon I was down to 102 volts.
Plugged into the 50 and was back up to 112v
My recent experience.


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Old 01-29-2016, 12:40 PM   #7
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IMO a 30 amp receptacle is better. A 50 amp service provides about 25 amps on each leg. So if you are trying to use one leg of a 50 amp circuit you are not going to be able to run close to 30 amps. When I tried running with one leg of the 220 receptacle on my generator it kept kicking the breaker. When I ran off the 30 amp 110 receptacle there was no problem.
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Old 01-29-2016, 12:51 PM   #8
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IMO a 30 amp receptacle is better. A 50 amp service provides about 25 amps on each leg. So if you are trying to use one leg of a 50 amp circuit you are not going to be able to run close to 30 amps. When I tried running with one leg of the 220 receptacle on my generator it kept kicking the breaker. When I ran off the 30 amp 110 receptacle there was no problem.
I'm not sure this is correct. 50 amp service should provide nearly 50 amps on each leg.
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Old 01-29-2016, 12:59 PM   #9
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Quote:
Originally Posted by TURBS View Post
When In Nashville last year I was plugged into 30 amp, about noon I was down to 102 volts.
Plugged into the 50 and was back up to 112v
My recent experience.


2015 Columbus 320RS
2008 2500HD Duramax
2015 nights camped "34"
X-4 Has always been my experience also. Places I visit, 30a s always browning out. Sometimes 95-105 volts. 50 amp doesn't seem to have that problem.
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Old 01-29-2016, 01:01 PM   #10
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Quote:
Originally Posted by jgriffin7 View Post
I'm not sure this is correct. 50 amp service should provide nearly 50 amps on each leg.
This is correct, that a split phase 120/240 campground service is capable of providing 50 amps PER leg or a 100 amps total.

This is often misunderstood by many. These links may help out:


Electrical Tutorial - Chapter 3 - 30 Amp versus 50 Amp


Click the 50 amp tab on left for this one:
RV Electric

AC Electricity

Here is a good visual:

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