Coast Resorts Open Roads Forum: 30 vs 50 amp electrical issue help
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 > 30 vs 50 amp electrical issue help

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toedtoes

California

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Posted: 04/19/23 12:39pm Link  |  Quote  |  Print  |  Notify Moderator

It doesn't really matter if the solar can power the AC or not.

The concern for the OP is whether the RV is actually 50 amp or not AND what damage may have been done to the electrical system and/or appliances.


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Posted: 04/19/23 01:15pm Link  |  Quote  |  Print  |  Notify Moderator

Since the RV is 50A perhaps no damage. Unless of course there was an open neutral.

I've posted many times that every 50A RV should have a EMS as in full power protection to protect against an open neutral. I prefer the PI HW50C. Don't think twice about the cost, just do it. I've even had a open neutral once on a 30A pedestal and had 160V in the RV. Some would say that's not possible - the open neutral was in the CG power distribution which is 240/120V just like a home. The PI shut down the power long before I saw the display and ran to unplug.


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ODG255

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Posted: 04/19/23 03:36pm Link  |  Quote  |  Print  |  Notify Moderator

Well, the plot thickens. I just got off of the phone with Heart land I asked them to look up my build based on VIN.

They told me that my trailer was supposed to be shipped with the 50 amp cord that I have but that there is supposed to be an “adapter” between cord and trailer. He stated that the trailer itself is 30 amp but when I told him that I want to run a second AC he said that will be no problem at all.

I asked if this is some kind of hybrid between 50 and 30 and he said yes exactly.
So everything in my trailer is 120v…. And it’s 30 amp but supposedly I can run 2 ACs?

I was hoping for clarification but this makes the whole thing even more convoluted.

I talked to my sales guy and he said that was the craziest thing he’d ever heard, I don’t know much but I have to agree with him!

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Posted: 04/19/23 04:41pm Link  |  Quote  |  Print  |  Notify Moderator

Yes you can run 2 A/C's if they are smaller and there is no start up problem. However the recommended sustained draw is 80% or 24A and A/Cs are certainly sustained. And you won't be able to run much else.

2 months in the Arizona summer at 100F+ you are very likely to have low voltage, tripped breakers etc. The dealer didn't know what they were selling - go get your money back and expect a fight.

ODG255

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Posted: 04/19/23 04:54pm Link  |  Quote  |  Print  |  Notify Moderator

Copy that is the stance I will take. The trailer will be very much lived in with kids and cooking etc so constantly tripping breakers and half ass AC won’t be acceptable. Thank you all for the input.

dougrainer

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Posted: 04/19/23 06:36pm Link  |  Quote  |  Print  |  Notify Moderator

ODG255 wrote:

Well, the plot thickens. I just got off of the phone with Heart land I asked them to look up my build based on VIN.

They told me that my trailer was supposed to be shipped with the 50 amp cord that I have but that there is supposed to be an “adapter” between cord and trailer. He stated that the trailer itself is 30 amp but when I told him that I want to run a second AC he said that will be no problem at all.

I asked if this is some kind of hybrid between 50 and 30 and he said yes exactly.
So everything in my trailer is 120v…. And it’s 30 amp but supposedly I can run 2 ACs?

I was hoping for clarification but this makes the whole thing even more convoluted.

I talked to my sales guy and he said that was the craziest thing he’d ever heard, I don’t know much but I have to agree with him!


Well, it appears that both Heartland AND the Dealer will lie to fix this problem. What Heartland told you is NONSENSE. YOU CANNOT RUN 2 RV AC UNITS ON 30 AMP SERVICE. PERIOD. You stated MY link is the wall connection to your trailer. That is 50 amp. Period. You need to go to the trailer and open the 120 breaker box access lid. Until YOU do this, there can be no good resolution to this thread. IF your breaker box has (2) 50 amp breakers, your RV IS 50 amp. Doug

PS, I had a Jayco electrical engineer tell me that I could NOT add a 3rd AC to a customers 39 foot Jayco with 50 amp service, because 3 AC's would draw about 42 amps and that would leave only 8 amps for the rest of the RV. I e mailed his boss and told him that person needed to be FIRED. 50 amp RV service is a TOTAL of 100 amp service.

toedtoes

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Posted: 04/19/23 06:42pm Link  |  Quote  |  Print  |  Notify Moderator

As I see it, you have a 30 amp trailer. You were sold a 50 amp trailer that could support two AC units. You know you need two AC units for the summer.

Either the manufacturer or the dealer screwed up the wiring. That the connector on the trailer for the cord is a 50 amp connector and not the appropriate 30 amp connector. There is no adapter that would go between the 50 amp connector on the trailer and the 50 amp cord that would do anything to the 30 amp system IN the trailer.

The 30 amp system IN the trailer is the limiting factor. All they've done is changed the plug to fit in a 50 amp outlet. But you still only get 30 amps to power your trailer.

I would add that I would not trust the wiring of this trailer. Someone has obviously messed up the wiring to the power cord.

Since you know you need two ACs, I would demand they take back this trailer and replace it with one that actually has a 50 amp system and is wired for the second AC (or better has the second AC installed already).

With 30 amps and living in the trailer for the summer in Arizona, you are going to use too much power for a 30 amp system - period.

Get the right trailer and power system now. Don't let them try to make this trailer work. If you do, you're going to find yourself living in a hotel during your Arizona stay while your trailer sits at a dealership waiting for warranty work.

Cptnvideo

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Posted: 04/19/23 06:58pm Link  |  Quote  |  Print  |  Notify Moderator

Correct, Doug. And I would like to know what the "adapter" consisted of that Mallard said needed to be installed between the 50 amp cord and the RV.
I assume the wire gauge is slightly larger in a 50 amp cord, resulting in slightly less voltage drop therefore slightly less current - but it would be negligible.

As an aside, I once stayed at a RV Park that claimed to have 50 amp service. But it was the same 120 VAC going to both legs. My previous DP MH shed loads down to 30 amps because it didn't see 240 VAC across the 2 legs.

* This post was edited 04/19/23 07:04pm by Cptnvideo *


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Grit dog

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Posted: 04/19/23 07:48pm Link  |  Quote  |  Print  |  Notify Moderator

Oh boy.
OP if you’re tuning in, Doug is right and telling you the right thing. Nevermind the rest of the bickering and misunderstanding

* This post was edited 04/19/23 09:02pm by Grit dog *


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wa8yxm

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Posted: 04/20/23 04:37am Link  |  Quote  |  Print  |  Notify Moderator

Why would they put a 50 amp cord on a 30 amp trailer?

Some parks charge based on which outlet you plug into so you'd be over charged every time you plugged into 50 amps.

* This post was edited 04/20/23 06:52am by an administrator/moderator *


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