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Old 11-08-2013, 06:46 PM   #1
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30 AMP (240 volt) Plug

My 2011 GT 378 XL of course came with a 50 AMP plug but can via an adapter be converted to a 30 AMP. The storage building where I keep it has a 30 AMP 4 wire Dryer Plug available. Knowing nothing about electrical stuff my question is, is there an adapter available to convert my 50 AMP to this type of 30 AMP?
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Old 11-08-2013, 06:52 PM   #2
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Do not plug into a dryer plug..it's the wrong voltage!
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Old 11-08-2013, 07:31 PM   #3
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A electriction could help adapt your 50amp

At risk of starting a disagreement I would suggest you contact a local electrician and I am sure he would help you make a adaptor or rewire your location if you are permitted to do so.
Your 50 amp 250 volt and the 30 AMP 250 VOLT are compatible but will only supply 30 amps unless you can change the breaker and insure the wire is of proper gauge. Yes some refer to 110 volt and 220 volt it is all the same as there is a variable to the voltage readings. A 30amp RV plug uses ONE 110/125 volt lead and the ground lead and the ground fault lead. The 50 amp RV plug uses two opposite phase 110/125 leads and the same two ground leads. The Dryer outlet depending on the type you have may or may not have the ground fault lead.

SEE: RV Wiring for a simple explanation. QUOTE "50 amp RV service can deliver approximately 12,500 watts (125 volts X 50 amps X 2) to the RV. Some people believe that the 50 amp RV receptacle is a "special" part. This is absolutely not true. In fact, it is a commonly available 50 amp, 250 volt receptacle. Unlike the 125 volt, 30 amp Travel Trailer receptacle, this one is used in many different 250 volt applications. It carries part number 14-50R. The matching plug is a number 14-50P.
There is a lot of misunderstanding about how MOST 50 Amp RV's are wired. Some of the larger bus type diesel pushers are all electric and in fact, do have 250 volt appliances in them. In that case, both sides of the 50 amp circuit are used to power those devices (just like your home) and those coaches MUST have 50 amp, 250V service in order to run things like the 250V stove, AC and the electric water heater. In the case of the rest of the 50 amp RV's, 250 volts is still supplied to the coach just like your home electrical service but typically one side of the line is used for all the 125 volt appliances except the rear AC and the other side is used for the rear AC only. The service coming into the RV is still 50 amp, 250 volts. Please note that all of the 50 amp RV's (at least in the US) use the SAME receptacle wired in the SAME way. If they didn't, they couldn't all plug into the same outlets at the RV park. "

Like I said consult a electrician so you do it correctly but for your lower power needs in storage it would work well.
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Old 11-08-2013, 07:32 PM   #4
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Do not plug into that plug, your camper is 120 volt system and a drier is 240 volts you will fry your camper.
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Old 11-08-2013, 07:38 PM   #5
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Originally Posted by jergeod View Post
Do not plug into that plug, your camper is 120 volt system and a drier is 240 volts you will fry your camper.
There are several threads on this forum where unknowing RV'ers plugged into the dryer outlet and did just that!
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Old 11-08-2013, 09:58 PM   #6
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Pathfinder is correct. If you check the voltage on any campground outlet you will find two 120 volt legs, if you check the voltage on a dryer or range outlet you will find two 120 volt legs. No difference. Doesn't matter if the dryer or range outlet is 30 amp or 50 amp, still two 120 volt legs. I would have no problem plugging my 50 amp motorhome into a dryer receptacle. (Assuming of course the receptacle is wired correctly.) However I doubt if such an adaptor exists.

Just my opinion.
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Old 11-08-2013, 10:08 PM   #7
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Originally Posted by Rmexline View Post
Pathfinder is correct. If you check the voltage on any campground outlet you will find two 120 volt legs, if you check the voltage on a dryer or range outlet you will find two 120 volt legs. No difference. Doesn't matter if the dryer or range outlet is 30 amp or 50 amp, still two 120 volt legs. I would have no problem plugging my 50 amp motorhome into a dryer receptacle. (Assuming of course the receptacle is wired correctly.) However I doubt if such an adaptor exists.

Just my opinion.
X2 It would not be hard to build...all you need is a dryer plug and a 50 amp RV receptacle and some 10 gauge wire. The 10 gauge is plenty big, it will carry 28 amps and should work fine. If you are not familiar with wiring, get a qualified electrician build it for you.

The urgency over not plugging into a dryer or similar receptacle applies to the folks who have a 30 amp service in their RV. It is only a single phase system and the 2 phase 220 will fry the 110 devices. In our coaches, we have a 50 amp 2 phase system.
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Old 11-08-2013, 10:11 PM   #8
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Normally the problem arises when you try and hook up a 30amp rv " one hot, one ground, one neutral" to a dryer outlet.

Not a 50 amp "two hots, one ground, one neutral"

If he used a 30 amp adapter on his 50amp cord and plugged into the dryer outlet he'd only have half the required voltage to the distribution center .


Correct?

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Old 11-08-2013, 10:13 PM   #9
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Originally Posted by f1100turbo View Post
Normally the problem arises when you try and hook up a 30amp rv " one hot, one ground, one neutral" to a dryer outlet.

Not a 50 amp "two hots, one ground, one neutral"

If he used a 30 amp adapter on his 50amp cord and plugged into the dryer outlet he'd only have half the required voltage to the distribution center .


Correct?

Turbs
Turbs, not so. The dryer outlet will provide 220v at 30 amps. He will just be limited to 30 amps for his RV instead of 50. A normal 50 to 30 amp adapter will put single phase 110 to both of the 110 distribution systems in the RV,
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Old 11-08-2013, 10:38 PM   #10
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Quote:
Originally Posted by buddyu View Post
My 2011 GT 378 XL of course came with a 50 AMP plug but can via an adapter be converted to a 30 AMP. The storage building where I keep it has a 30 AMP 4 wire Dryer Plug available. Knowing nothing about electrical stuff my question is, is there an adapter available to convert my 50 AMP to this type of 30 AMP?
Buddy, is the dryer/appliance outlet you are referring to look like this one (NEMA 14-30R)?



or is it something else?

If it is a 14-30R, do you own a multimeter aka multi-tester (which is a $10-20 dollar tool all RV'ers really should have)?

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