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Old 05-09-2014, 08:23 PM   #29
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Funny... But I use the Fleetwood energy management system that they have been un-successful in using.....
Yeah.....I sure don't have any complaints either............
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Old 05-10-2014, 05:51 AM   #30
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Most manufacturers try to match the generator to the incoming supply as best as they can, so a 30A coach would have a 3500W generator while a 50A coach would have a 5500W generator.
Hummmm!! I wonder why Fleetwood would put a over kill LPG 6.5W(54.2AMP) in my 30 AMP MH? It has no problem running a 13.5K & 15K AC's the same time.

And they also had a optional 7.5W diesel for the same model 30 AMP MH's.
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Old 05-10-2014, 05:58 AM   #31
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Hummmm!! I wonder why Fleetwood would put a over kill LPG 6.5W(54.2AMP) in my 30 AMP MH? It has no problem running a 13.5K & 15K AC's the same time.

And they also had a optional 7.5W diesel for the same model 30 AMP MH's.
Mine has a 5.0 more than adequate for running the whole show. Don't understand the earlier 3500 comment, never seen that with 2 airs, but I'm still green.
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Old 05-10-2014, 06:25 AM   #32
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I would not just get a 50amp adaptor for the 30amp without having someone that knows what they are doing to make sure the wiring is capable of 50amps.
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Old 05-10-2014, 09:24 AM   #33
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I would not just get a 50amp adaptor for the 30amp without having someone that knows what they are doing to make sure the wiring is capable of 50amps.
HuntingHawk
Most, (all?), campground pedestals with a 50A receptacle also have a 30A receptacle .
No adapter is needed to connect a 30A RV to a 30A receptacle.

However, if there is only a 50A receptacle in the pedestal, a 50A male to 30A female adapter is required to connect a 30A RV.
In that case the pedestal breaker may not adequately protect the 30A cord, (but the circuit breakers in the RVs electrical panel will protect the wiring in the RV).

To connect a 50A RV to a 30A receptacle, a 30A male to 50A female adapter is required.
If/when a 50A RV is connected to a 30A receptacle not everything in the RV can be operated with the 30 available amps.

BTW, years ago some 30A RVs with 2 roof airs had a manual "front/rear A/C switch" somewhere in the cabin.

Mel
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Old 05-10-2014, 09:37 AM   #34
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I would not just get a 50amp adaptor for the 30amp without having someone that knows what they are doing to make sure the wiring is capable of 50amps.
The 50 amp at the pedestal indicates service available. It will still only provide the current that your system demands. Your electrical system (circuit breakers) still protect your equipment from exceeding 30 amps.
Using the 50 to 30 amp adapter is done to hopefully provide a cleaner connection to the heavier wiring used in the 50 amp pedestal circuit.
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Old 05-10-2014, 09:48 AM   #35
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Doesn't clearly answer the question. If you connect to a 30A shore supply you will have 30A service - no matter if your RV is set up for 30A service, 50A service, or 100A service. The question was "How is your RV built?" Most manufacturers try to match the generator to the incoming supply as best as they can, so a 30A coach would have a 3500W generator while a 50A coach would have a 5500W generator.
I have worked on thousands of motorhomes and all the motorhomes with two AC's and thirty amps service had a 5500 or 6500 generator to run both AC's at the same time. I have never seen a motorhome with two AC's with a 3500 watt generator.
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Old 05-10-2014, 09:54 AM   #36
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'07 National Surfside Class A motorhome.

When I'm hooked up to 30 amp shore power, I can only get one of my AC's to operate. When I unplug the shore line and turn on my generator, I can get both AC's to operate. I don't want to run my generator. Is there any way to get both AC's to operate from shore power?

Is there any benefit to running the generator while plugged in to shore power? Is it even safe to do so?

Thanks.

Mike
The simplest cheapest and easiest method to run both A/C's is to run one using your regular 30 amp shore power cord. The second A/C can be powered using the 20 amp outlet at the pedestal along with a 12 gauge extension cord.

You would have to run romex from your rear A/C or the A/C sub panel CB to a dedicated junction box at the rear of the coach or whatever compartment your shore cable goes into. Then using the extension cord to plug into the pedestal and the junction box.

You now have power to run your second A/C.

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Old 05-10-2014, 10:11 AM   #37
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I have worked on thousands of motorhomes and all the motorhomes with two AC's and thirty amps service had a 5500 or 6500 generator to run both AC's at the same time. I have never seen a motorhome with two AC's with a 3500 watt generator.
when I read that I said oh boy the miss information on the internet is amusing and really can mess things up for the novice. Glad you caught it too.
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Old 05-10-2014, 11:18 AM   #38
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I would not just get a 50amp adaptor for the 30amp without having someone that knows what they are doing to make sure the wiring is capable of 50amps.

The adaptor does not put 50 amps into the coach. It puts 2 30 amp circuits into parallel, kind of like 2 12 volt batteries in parallel gives you 12 volts not 24. That's not a real great explanation someone else will probably come along and do better.
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Old 05-10-2014, 12:35 PM   #39
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50 amp versus 30 amp has been discussed SO many times previously that my fingers are now stubs.

50 amp service is really 100 amps total on two separate out of phase 120 VAC Lines, L-1 and L-2.

A 50 amp to 30 amp dogbone simply takes only ONE of the 120 VAC lines, either L-1 or L-2, NOT both and uses that 120 VAC to power the 30 amp coach.

The 30 amp coach and its CB's are still only 30 amp 120 VAC regardless of how much 120 VAC you try to stuff into the coach.

Another way to look at it is this:

A RV 30 amp 120 VAC supply has 3600 watts of power available to use - 120 x 30 = 3600.

A RV 50 amp 120 VAC supply has 12000 watts of power available to use - (L-1)50 x 120 + (L-2)50 x 120 = 12000.

Here is a web site that you should bookmark that is VERY helpful to RVer's. It will explain EVERYTHING you will ever need to know about RV Electric.

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Old 05-10-2014, 01:16 PM   #40
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Richard, saw this diagram, it may help the explanation.. The 30 amp adapter does not use 1 leg of the 50 amp circuit..
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Old 05-10-2014, 05:31 PM   #41
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Hooligan,

Your post contradicts the drawing that you have posted.

Your drawing IS correct and IS only using one Leg of the 50 amp plug.



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Old 05-10-2014, 05:58 PM   #42
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Hooligan,
Your post contradicts the drawing that you have posted.
Your drawing IS correct and IS only using one Leg of the 50 amp plug.
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Correct
His drawing clearly shows only 3 wires:
1 Neutral--(Gray)
1 Ground--(Green)
1 Hot Leg--(Black)
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