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  #1   IP: 209.209.195.168
Old December 5th, 2002, 09:14 AM
RD RD is offline
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Default 50 amp service for RV

Doe's anyone have a drawing on how to wire up an adaptor to feed 50 amp 220 v service to RV from two 30 amp 120 v rec. that will meet nec code.
Thanks
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  #2   IP: 148.78.243.121
Old December 5th, 2002, 03:44 PM
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Wgoodrich Wgoodrich is offline
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Where are you going to find this 30 amp receptacle? Is it a female plug or a duplex receptacle?

If you try to do this and if you have 220 volt equipment it can burn out your 220 volt equipment. You might want to think this out before you try it.

You motor home is designed to accept 240 volts using a white shared neutral.

If you run 30 amp 120 volts to that then you are no longer using a shared neutral but you are using a grounded leg that can be overloaded.

You need to be very careful what you are doing in this venture.

Curious

Wg
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  #3   IP: 209.209.195.6
Old December 5th, 2002, 05:03 PM
RD RD is offline
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Wg, Some rv parks don't have 50 amp rec. but have 2 30 amp RV rec side by side. I have seen in use a device that plugs into both 30 amp rec (TT-30R) and feeds a single 50 amp female rec (14-50R). This is the adapter I was talking about.
Thanks
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  #4   IP: 209.209.195.51
Old December 5th, 2002, 05:49 PM
RD RD is offline
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Wg, The pigtails on adaptor is 1-30 amp and 1-20 amp instead of two 30 amp.
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  #5   IP: 148.78.243.122
Old December 5th, 2002, 06:29 PM
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Wgoodrich Wgoodrich is offline
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YOu are adapting and not using the material as the manufacuture lisging is approved to be used.

I do not recommend this practice.

If you must do as you desire then you would buy a femal plug that matches your motor home cord. Then by a weather proof junction box. Then install a short piece of hard usage rubber cord to connect to the matching female receptacle that matches your cord. The rubber cord will need a white black red and green wire 10 8 awg copper rubber cord about 2 feet long.

Then buy a rubber cord 10 awg three wire black white green about 4 feet long. Cut the cord in two pieces and use weather proof rubber cord connectors to connect each cord into the junction box.

Then connect the black and red wires of the larger cord to the two hot lugs of the matching female plug. Then connect the white wire to the silver screw of the plug and the green wire to the green screw of that plug.

Then buy two male plugs matching the two receptacles you have to plug into.

Then wire nut in the junction box the the black of one short 10 awg cord to the black wire of the larger rubber cord. Then connect the black wire of the second short 10 awg cord to the red wire of the larger rubber cord. Then connect all white wires together and all green wires together in that junction box and use a weather proof cover plate to seal that junction box.

Then in each male plug that matches the receptacles amapcity rating and configuration that you have to plug into connect the black wire of one cord to the brass screw of one male plug then connect the white wire to the silver screw of that male plug and connect the green wire to the green screw of the mail plug.

Repeat the process on the second male plug.

Then before you do anything read the following warning.

The two 120 volt receptacles that you are plugging into must be tested. YOu must use a voltage tester and test between the hot wire or prong of the first receptacle with that voltage tester to the hot wire or prong of the second 120 volt receptacle. If you get 240 volts then you may use this adapter. If you read zero volts between the two receptacle hot prongs or wires reading voltage between these two receptacles then you must not use these two like receptalces. YOu would not have 240 volts to adapt from.

You must only use this adapter with two receptalces that read 240 volts between the two hot prongs of the two receptacles.

Now if you energize using this adapter then turn off your main breaker in your motor home. Plug in your adapter and motor home cord. Test for proper voltage in your motor home panel reading 240 volts between the two hot lugs. If you read zero volts between the two hot lugs of your motor home panel then disconnect you do not have 240 volts but two 120 volts of like hot wires both receptacles coming from the same hot line in the park pedistal.

If you read 240 volts in your motor home then turn one branch circuit on at a time to phase on your electrical power checking for proper operation.

I suspect you will find an adapter as you are trying to build at some mobile home retail stores.

Be careful

Wg
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