I need to add a 30amp plug to the outside of my garage to plug our 5th wheel into. I already have a 50amp 220v feed ran out for hooking up air comressor, welders and such. I am getting a 50amp service panel that contains a 30amp and 20amp plug with seperate breakers for each. Since they contain their own breakers would their be any issue with running that panel off one leg of the 220 I already have.Well actually I know it will work, what does code have to say about it?Here is the panel

Yes, there could be issues. Most compressors and welders do not utilize a neutral conductor. They are strickly 220 volts. Two hots and a ground.Panel you show is 120 volts. Three wire hot, neutral and ground.

Yes, You can run the 120V plugs off of one leg of the 50A service. This is a normal condition and is done all the time.

I would wire the 30 to one side and the 20 to the other.

To summarize:If you have a neutral, all would be fine (you need a hot, neutral and ground for either 20 or 30 amp service). Wiring the hot for the 20 amp outlet from one leg and the 30 amp from the other leg would be preferable, particularly if you ever want to use both at the same time.

Why not do the whole thing and be done with it. $135 on E-Bay.http://compare.ebay.com/like/290529844687?var=lv&ltyp=AllFixedPriceItemTypes&var=sbar

Wiring an RV Service Panel | Good Sam Community

16 Replies

Mopar_Mudder
Explorer
Aug 28, 2013
Ozlander wrote:
Why not do the whole thing and be done with it. $135 on E-Bay.

http://compare.ebay.com/like/290529844687?var=lv

Not a bad idea, I have no use for the 50 amp plug now but who knows what the future may bring.

To answer the question on the nuteral wire, yes I have one. I ran 4 wire when I did everything: Black, Red, White and Ground

Thanks for the info guys
Ozlander
Explorer
Aug 28, 2013
Why not do the whole thing and be done with it. $135 on E-Bay.

http://compare.ebay.com/like/290529844687?var=lv&ltyp=AllFixedPriceItemTypes&var=sbar
wolfe10
Explorer
Aug 28, 2013
To summarize:

If you have a neutral, all would be fine (you need a hot, neutral and ground for either 20 or 30 amp service).

Wiring the hot for the 20 amp outlet from one leg and the 30 amp from the other leg would be preferable, particularly if you ever want to use both at the same time.
time2roll
Nomad
Aug 28, 2013
I would wire the 30 to one side and the 20 to the other.
ScottG
Nomad
Aug 28, 2013
Yes, You can run the 120V plugs off of one leg of the 50A service. This is a normal condition and is done all the time.
enblethen
Nomad
Aug 28, 2013
Yes, there could be issues. Most compressors and welders do not utilize a neutral conductor. They are strickly 220 volts. Two hots and a ground.
Panel you show is 120 volts. Three wire hot, neutral and ground.

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Wiring an RV Service Panel

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