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Old 05-16-2020, 05:27 PM   #1
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50amp RV with 30amp cord and 50amp adapter

I bought a new camper, or a new to me camper. The camper is a 50amp, the cord that came with it is a 30amp, I know you can plug a 50amp camper into a 30 amp plug and will work fine, but i have a 30-50 amp adapter, can i use the current cord which is a 30amp with a 50 amp adapter, basically can i safely use 50amps thru a 30amp cord?
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Old 05-16-2020, 05:34 PM   #2
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No you can't. Having said that you aren't going to get 50 amps through the cord anyway without modifying the connector. The outlet you would plug the 30 amp cord into will have a 30 amp breaker so that's all that it will receive. Your 50 amp rv will also not work "fine" on 30 amp. You will be limited as to what appliances you can use together at any given time. if your adapter allows you to plug into a 50 amp outlet and you have 50 amp main breakers don't do it it is unsafe.
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Old 05-16-2020, 05:44 PM   #3
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If you are trying to use a 30 amp extension to power an RV that is wired for 50 amp service; between a 50 amp supply and the RV , you have to be very careful because your 30 amp cable is just that ... designed with connections and wire to safely carry 30 amps and you can overheat it .
Your 50 amp supply to 30 amp cable adapter will only use one leg of the 50 amp service to feed the 30 amp cable but that's still more power than the 30 amp was designed for . When you adapt the power from the 30 amp cable back to the RV , you're splitting the power supply in half , so each half in the RV is only getting partial power . YOU CANNOT RUN EVERYTHING.
Even if the connections and wire hold up , the RV can use 2 X 50 amp service and your adapters have cut it in half.
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Old 05-16-2020, 05:46 PM   #4
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The 50 amp, down to 30 amp adaptor, only powers the one and only leg of the 30 amp cord.

If you use a 30 amp, back up to 50 amp adaptor, at the RV, it will split that power back to 2 legs.

Now your able to draw a total of 50 amps thru the undersized 30 amp cable before the 50 amp breaker at the power post trips.

By then, your overloading the cord by up to 20 amps. It should be getting hot and causing voltage drop, I don't suggest it.
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Old 05-16-2020, 05:49 PM   #5
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0k, this is what i wanted to know, I like the 30 amp option but i want to make sure it is safe to use, so seems like i need to buy a new cord. i appreciate the info
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Old 05-16-2020, 05:53 PM   #6
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Jasindude1

Welcome to iRV2 Again.

What kind of camper? Is the cord a plugin or wired to the camper?

Please post your make,model, and year in a signatue. It makes things so much easier to help you.

You might also want to add it to your profile in the user CP,

Are you going to the Balloon Fiesta. We can use help!
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Old 05-16-2020, 05:55 PM   #7
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Most pedestals have both 30 and 50 Amp outlets. If you plug your extension cord into the 30 Amp jack it is safe, and you won’t be able to overload it. But if you don’t keep your electric usage below 30 Amps, you will pop the pedestal breaker.
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Old 05-16-2020, 05:56 PM   #8
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Quote:
Originally Posted by Jasindude1 View Post
0k, this is what i wanted to know, I like the 30 amp option but i want to make sure it is safe to use, so seems like i need to buy a new cord. i appreciate the info
Thatís your best move, but if you can live with 30A (3600W max), plug into a 30A receptacle on the pedestal. Donít adapt up to a 50A receptacle at the pedestal.

Just so you know, a proper 50A connection is good to 12,000W, so thereís a huge difference between the two.
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Old 05-16-2020, 06:16 PM   #9
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i've never heard of an RV of any type thst has 50-amp service but a 30-amp cord. OP...why do you think your RV has 50-amp service? if that's true you might be better served by switching out your 30-amp cord for the correct 50-amp.
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Old 05-16-2020, 06:39 PM   #10
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Quote:
Originally Posted by Jasindude1 View Post
0k, this is what i wanted to know, I like the 30 amp option but i want to make sure it is safe to use, so seems like i need to buy a new cord. i appreciate the info


If itís the only cord you have how does a 30 amp cord even fit on a 50 amp camper.
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Old 05-16-2020, 07:17 PM   #11
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If itís the only cord you have how does a 30 amp cord even fit on a 50 amp camper.
that was essentially my question. OP...why do you think your RV is 50-amps?
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Old 05-16-2020, 07:52 PM   #12
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Fire Hazard

For 30A cord plugged into a 50A outlet, the Pedestal 50A breaker is the overcurrent protection for the cord/wire rated at 30A. The cord/wire will overheat and could melt the insulation and cause a fire, while the 50A overcurrent protection will not trip ... at least until the wires short after it melts and trips the breaker on instantaneous/magnetic element. Continuously using a 30A wire with 50A will overheat the wire insulation over time and the insulation and cable sheath will deteriorate. There are may reasons this is a bad idea but the most important is that it could burn your rig down.
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Old 05-16-2020, 08:14 PM   #13
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Originally Posted by swduns View Post
For 30A cord plugged into a 50A outlet, the Pedestal 50A breaker is the overcurrent protection for the cord/wire rated at 30A. The cord/wire will overheat and could melt the insulation and cause a fire, while the 50A overcurrent protection will not trip ... at least until the wires short after it melts and trips the breaker on instantaneous/magnetic element. Continuously using a 30A wire with 50A will overheat the wire insulation over time and the insulation and cable sheath will deteriorate. There are may reasons this is a bad idea but the most important is that it could burn your rig down.
If he plugs into a 50A outlet you are correct, but not if he plugs the cord into a 30A outlet. In that case he is protected by the 30A breaker.
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Old 05-16-2020, 09:17 PM   #14
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Ya it says 50 amp right on the plug in for it, I think the PO just used a 30 amp cord bc some campgrounds around here only have 30amp hook ups. My camper is a 2011 heartland prowler27f bumper pull.
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