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Old 04-29-2015, 10:41 PM   #1
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50 amp outlet for RV's

Hey again,

I just had a 50 amp outlet installed and it works in our electric car. But when I plug the RV into it, it does not work.

This is related to my other topic of shoreline not working and after doing some digging I found out that my 110 cord works but not my 50 amp.

Is there a special wiring that is needed for RV's?
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Old 04-29-2015, 10:54 PM   #2
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Hello, what kind of plug of the electric car use? You need a neutral for the RV to work.
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Old 04-29-2015, 11:10 PM   #3
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Sorry but could you clarify the question I just found out it should be two 120 hot legs and not 240 direct.

Is that what you mean?
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Old 04-29-2015, 11:11 PM   #4
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The electric car uses a 50 amp.
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Old 04-29-2015, 11:14 PM   #5
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Is it a 3 wire plug or 4 wire plug?
Is the breaker in the house one breaker or two hooked together(double size)?
Pictures would be good of your car plug as well as the one you installed in the house.


Is the cars 50 amp single phase meaning 1 hot (120volt) wire at 50 amps for the car?
TV 50 amp is two hot wires, 1 neutral and 1 ground wire. (4 prong)
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Old 04-29-2015, 11:47 PM   #6
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Here they are it appears they just have 3 wires.

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Old 04-30-2015, 12:12 AM   #7
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What I see is 2 hot wires and a green ground wire and no neutral(white wire) going out of the panel. You need to add a neutral (white) wire to the outlet.

Now the question is with a neutral wire hooked up to the plug have any effect on your car plug.
Who installed this plug? If it was a licensed electrician you need to ask him why he didn't install a neutral wire. May be the car didn't need it.

You need to find out more what the car needs.
Now if you find out that the car will not have any negative effects you can install a white wire from the neutral bus of the panel to the neutral on the receptacle and that should make the RV run fine. The RV needs this for everything to work.
Look at my picture again.

Hope this helps you understand.
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Old 04-30-2015, 01:05 AM   #8
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I also have a plug in car, be very careful the plug for the car charging is probably 220 volts on 50 amp breakers. if you plug your RV into a 220 volt house plug you will smoke a bunch of circuits in your RV. The 50 amp service for RV's is 2 separate 110 volt circuits (it is possible to feed a 220 volt appliance in an RV but the breaker in the RV intended for the 220 Volt appliance would then have to be wired for that purpose).

Looking at your pictures I would say Iggy is correct that the plug is missing the neutral wire for use with an RV, but it is also possible the plug is wired at 220 volts just saying you better be sure what you are dealing with or it could get very expensive very fast.
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Old 04-30-2015, 10:18 AM   #9
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Thank you all for all the great feedback.

So I need to insure that the electrician installs the plug to meet the following criteria:

- The RV 50 amp needs to be two hot wires, 1 neutral and 1 ground wire. (4 prong)
- The 50 amp service for RV's is 2 separate 110 volt circuits.

So a question is from my picture above does it look like they installed 2 110 volt circuits or did they install a 1 220 circuit or is it clear from the picture?
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Old 04-30-2015, 10:23 AM   #10
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Quote:
Originally Posted by E-man View Post
Thank you all for all the great feedback.

So I need to insure that the electrician installs the plug to meet the following criteria:

- The RV 50 amp needs to be two hot wires, 1 neutral and 1 ground wire. (4 prong)
- The 50 amp service for RV's is 2 separate 110 volt circuits.

So a question is from my picture above does it look like they installed 2 110 volt circuits or did they install a 1 220 circuit or is it clear from the picture?
From the picture they installed a 220 V service with no neutral. All you require is the White Wire or Neutral installed as per previous posters. This should not effect your car charger either.

The receptacle is upside down for a RV plug as well
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