Receptacle Adapter HelP!!!

I was hoping to use just 1 adapter, but perhaps I need two?

Stop, don't do anything yet or you may risk damaging many parts of the TT electrical system. Persons more knowledgable than I will help you address this issue. The NEMA 6-50R is not compatible with your 30A 120v TT plug.

What you have is either a plug for a 50 amp range, or possibly something else. You will need a new plug, either a 30 amp 120 Volt RV plug, or a 50 amp 240 volt RV plug. Unless you are familiar with electrical you will need an electrician to do this. NOTE: make sure electrician understands that you want to end up with a 120 Volt plug for your trailer, as RV's and 30 amp 240 dryers use almost the identical plug.
If you go for the 50 amp 240 volt RV plug you will be able to handle a bigger service in the future, but you will requite a 50 to 30 amp RV adapter for your Airstream.

Thanks for the information guys!

What about the below? These seem to do exactly what I need.
The below is a link which will take the plug from the Airstream (NEMA TT-30P) and convert it to a NEMA 14-50P.

Connector = TT-30R to NEMA 14-50P
http://www.corddepot.com/shop/50a-to-30a-adapters/50a-to-30a-rv-adapter/?gclid=CjwKEAjwtYSsBRCDx6rM1v_uqmsSJAAZgf2qX1CUddnBXZOIC053vkQvmhc5P1G3goiwJGHJBu4GDhoC9Efw_wcB

The below is a link which will take the new NEMA 14-50P and convert it to the house connection (NEMA 60-50R).

Connector = NEMA 14-50R to NEMA 6-50P
https://www.evseadapters.com/14-50r-to-6-50p-adapter

Danger, danger! Even experienced and licenced electricans have screwed this up. Guaranteed stories about damaging 120 volt 30 amp RVs every year which can result in thousands of $$ in repair costs. Make sure whoever is doing this knows exactly what is needed. Test the voltage at the new TT-30R before plugging to verify it's okay.

The existing wiring is use-able and that's all. That is, as long as you intend to convert that existing receptacle and circuit for your RV only. You need a single pole, 120 volt 30 amp breaker in your panel. If the wiring is rated for 50 amps, that's good as it can minimize any potential voltage drop issue. You will need a TT-30R receptacle of course. You will note on these RV receptacles that they will be marked "125 volts 30 amps". The side of an RV also has the same marking. Electricians can completely overlook this and wire it at 240 volts...

I highly recommend that you install a disconnect switch at the new TT-30R location so that you aren't plugging in your TT live every time which can eventually cause damage to the plug blades and eventual overheating. A motor rated switch works well as they have heavy duty contacts to withstand inrush current.

Danger, danger! NO!!!!

What you have there is a standard 50 amp RV configuration which has two hot legs and a neutral leg. It is not compatible in any way. The dryer recept. you linked to in first post is for a 240 volt dryer with NO neutral.

Maybe you only need a 15 amp connection to your Airstream? If so, you have a couple of options. One is to forget about the existing 50 amp recept. and wire in a whole new dedicated 15 amp circuit. If you have a long run to the trailer, you could have a voltage drop problem and would need to increase the size of the wire to #12, #10 or even #8 in some cases. Alternatively, use the wiring only to the existing 50 amp recept. You need a TT-30R as shown in the 3rd pic.

I really recommend that you just hire an electrician to do this - and an experienced licensed one - not a friend of a neighbor who wired his garage once. An electrician will take care of the licence, do a load calculation for the house panel if needed, and do final sign-off.

mwhitedesigns wrote:
Thanks for the information guys!

What about the below? These seem to do exactly what I need.
The below is a link which will take the plug from the Airstream (NEMA TT-30P) and convert it to a NEMA 14-50P.

Connector = TT-30R to NEMA 14-50P
http://www.corddepot.com/shop/50a-to-30a-adapters/50a-to-30a-rv-adapter/?gclid=CjwKEAjwtYSsBRCDx6rM1v_uqmsSJAAZgf2qX1CUddnBXZOIC053vkQvmhc5P1G3goiwJGHJBu4GDhoC9Efw_wcB

The below is a link which will take the new NEMA 14-50P and convert it to the house connection (NEMA 60-50R).

Connector = NEMA 14-50R to NEMA 6-50P
https://www.evseadapters.com/14-50r-to-6-50p-adapter

Thanks redracer for all the info.

Playing devils advocate the description on the adapater states that it down converts 50A to 30A.

And then what about the below connector?
Connector = NEMA 14-50R to NEMA 6-50P
https://www.evseadapters.com/14-50r-to-6-50p-adapter

If you have identified your house outlet correctly - No, you can't do it.
The house outlet has 2 - 120v prongs and 1 - ground prong. There is no neutral wire. At the trailer you need 1 - 120v prong, 1 - neutral prong and 1 - ground prong. If you have an electrician correctly rewire the house outlet for a NEMA 14-50R receptacle then you can use a standard 50 amp to 30 amp RV adapter. He can put a 14-50P Plug on the dryer cord so it will be compatible.

Your house receptacle..........



That is a 240V AC outlet (2 hot legs---120V each and a Ground)

Your 30A RV uses 1 Hot leg/1 Neutral/1 Ground


What you could do.........

Go to breaker panel and disconnect wires on the 50A breaker (Replace with a 30A circuit breaker)

Get a 30A RV receptacle and outlet box

Wire it using the existing wiring from that 50A plug BUT use only 1 Hot leg and the 1 ground......then use the other existing wire (that was 2nd hot) as Neutral (Wrap white tape at each end of wire) and connect panel side end of that wire to neutral bus bar. Connect the ground wire to ground bus bar and the 1 hot leg to new 30A circuit breaker

Now you have a 30A RV receptacle to plug your RV into

Get yourself a bonded and insured electrician and make sure he understands you not only want a 30amp plug but you want 120 volts to enter your Airstream. Have him check the flow when finished. At least that way when you burn out everything in your RV you can hold him accountable.