I just bought a new trailer.. Its not a camper/TT.. its a car hauler, however... it is wired for 50a service. My garage is wired for 50a service but with a different plug. Trailer has a 4 prong plug, looks like this - https://www.gexpro.com/shopimages/gexpro/P/S/3/PS_3867_IMAGE_ZM.jpgThe outlet in my garage looks like this- http://ecx.images-amazon.com/images/I/41xgA8DDz2L._SX300_.jpg Any one of you helpful folks know of the right cord i need toplug my 4 pronger into to turn it into a 3 pronger? I have found one... But its over $80. (what the..) http://www.amazon.com/Conntek-50-Amp-Electric-Vehicle-Adapter/dp/B00STD8SEUAny and all help is greatly appreciated. I have bought a 50a to 15a converter to allow me to simply plug ina everyday extension cord, i have basically the same thing for our TT.. I would like to take advantage of my garage being wiredwith 50a service though. Thanks-Sean

That outlet looks like an air conditioner outlet.Go to Lowe's or Home Depot and get an RV50 outlet to replace the one in your garage.Verify it is actually 50 amp and 120 volts.

Don't forget to pick up some marshmallows to roast over your 240 volt fire.

You really don't want to use that 3 prong outlet for your RV. It is a 240v 50A outlet with no neutral. The 3 wires are 2 hots and a ground. For an RV you need a 4 wire connection with a separate neutral and ground.There shouldn't be a ready made adapter.It is possible to use the ground for the neutral and make it work but it's not advisable at all. It could pose a rather large safety hazard.By the way, 50 amp RV outlets are not 50A 120v; they are 50A 240/120v split phase.

KD4UPL wrote:You really don't want to use that 3 prong outlet for your RV. It is a 240v 50A outlet with no neutral. The 3 wires are 2 hots and a ground. For an RV you need a 4 wire connection with a separate neutral and ground.There shouldn't be a ready made adapter.It is possible to use the ground for the neutral and make it work but it's not advisable at all. It could pose a rather large safety hazard.By the way, 50 amp RV outlets are not 50A 120v; they are 50A 240/120v split phase.Thats all i needed, Thank ya

You need a standard range receptacle.Range receptacleI am guessing that you will not four wires in your existing wiring. You will need to replace what feeds the current receptacle with 6/3 w ground cable.

Needing help with electrical plug | Good Sam Community

Ron_Gratz
Explorer
Jan 07, 2016
LinkedXJ wrote:
The outlet in my garage looks like this-
http://ecx.images-amazon.com/images/I/41xgA8DDz2L._SX300_.jpg
The image appears to be the Eagle Electric Surface Mount Receptacle Outlet 5-50 50A 125V 1251.

If that actually is what you have in your garage, it is intended to provide up to 50 amps of 125V power.
And, if properly installed, the feed circuit would be one hot and one neutral capable of handling 50A plus a ground.

There should be a single 50A breaker which controls this receptacle.
The receptacle would not be able to provide two legs of power at 50A each. Nor could it provide 240V power.

If you want more than 15A going to the trailer, I recommend that you have a licensed electrician install a receptacle which is compatible with your trailer's electrical system.

Ron
LarryJM
Explorer II
Jan 06, 2016
KD4UPL wrote:
You really don't want to use that 3 prong outlet for your RV. It is a 240v 50A outlet with no neutral. The 3 wires are 2 hots and a ground. For an RV you need a 4 wire connection with a separate neutral and ground.
There shouldn't be a ready made adapter.
It is possible to use the ground for the neutral and make it work but it's not advisable at all. It could pose a rather large safety hazard.

By the way, 50 amp RV outlets are not 50A 120v; they are 50A 240/120v split phase.

In my non electrician view that's the most informative post thus far and I would say what you have is a 50A 240V receptacle and as KD4UPL states will have to hots and a ground. What you want is a 50A 240/120 receptacle which is a standard range configuration which will have two hots, a ground and a neutral. The 50A 240V configuration does not have 120V available to it whereas the 50A 240/120V has both 240 and 120 V available to it. Typical 50A RV use the 50A 240/120V configuration.

As mentioned it's work checking to see if the line feeding that existing 50A/240V receptacle has an unconnected neutral which would allow an easy conversion to a 50A 240/120V configuration w/o running a lot of new wire.

Larry
hohenwald48
Explorer
Jan 06, 2016
LinkedXJ wrote:
Yes, i understand Lynnmor had nothing to offer but a smartass remark.
I kept my remark to my self.

I thought he was making a humorous remark. Kind of hard to tell on a forum though. :)
pianotuna
Nomad III
Jan 05, 2016
Hi,

Use a meter to check the voltages. Be careful that neither leg is more than 120 volts.

What is existent in the garage may be intended for a 240 volt welder.

http://www.myrv.us/Imgs/PDF/50-amp%20Service.pdf
Lynnmor
Explorer
Jan 05, 2016
rjxj wrote:
I hope you fully understand why Lynnmor said that. This classic rv disaster stuff.

Yes, I was little abrasive, but it was so obvious that this guy was getting real close to frying his RV. In hindsight, maybe we should just let Darwin's law take its course.
Old-Biscuit
Explorer III
Jan 05, 2016
LinkedXJ wrote:
I just bought a new trailer..

Its not a camper/TT.. its a car hauler, however... it is wired for 50a service.

My garage is wired for 50a service but with a different plug.

Trailer has a 4 prong plug, looks like this -
https://www.gexpro.com/shopimages/gexpro/P/S/3/PS_3867_IMAGE_ZM.jpg

The outlet in my garage looks like this-
http://ecx.images-amazon.com/images/I/41xgA8DDz2L._SX300_.jpg

Any one of you helpful folks know of the right cord i need to
plug my 4 pronger into to turn it into a 3 pronger?

I have found one... But its over $80. (what the..)

http://www.amazon.com/Conntek-50-Amp-Electric-Vehicle-Adapter/dp/B00STD8SEU

Any and all help is greatly appreciated.

I have bought a 50a to 15a converter to allow me to simply plug in
a everyday extension cord, i have basically the same thing
for our TT.. I would like to take advantage of my garage being wired
with 50a service though.

Thanks
-Sean

Did you read what that adapter intended use is for????
Telsa Electric Vehicle Charging adapter.
EV uses 240V for charging.

Your RV will NOT like being connected to 240V as it uses 120V for components.
You will FRY most of the electrical equipment if you were to connect to that 240V receptacle.

DO Not use as currently configured.
time2roll
Nomad
Jan 05, 2016
Pull the outlet from the wall... you might just fine a neutral in the J-box like I did. :B
azrving
Explorer
Jan 05, 2016
LinkedXJ wrote:
Yes, i understand Lynnmor had nothing to offer but a smartass remark.
I kept my remark to my self.

Just want to be sure a fellow rver doesn't smoke a couple thousand dollars in appliances.
westend
Explorer
Jan 05, 2016
Your garage receptacle is not a 50 amp receptacle, nor can it be simply rewired to a standard 50 amp receptacle. If you want a standard 50 amp receptacle, it will need 6/3 wire, as mentioned. You may also want to look in your load center and see if the garage receptacle is interrupted by a 50 amp breaker, my guess is that it is not. There are a lot of these older 240V receptacles in garages. They were used to power welders or other 240V appliances.
LinkedXJ
Explorer
Jan 05, 2016
Yes, i understand Lynnmor had nothing to offer but a smartass remark.
I kept my remark to my self.