Forum Discussion
ktmrfs
Aug 27, 2023Explorer II
nickthehunter wrote:
All you need is the 50A line and the 50A and 30A receptacles can be run off that. I am not up on the code for that but it may require you to change the receptacles and breakers when you change to a 50A RV.
TT 50A is a 240V/50A 4 wire circuit with two 120V/50A legs, two hot, one neutral one ground.
30A is a 30A/120V 3 wire one hot, one neutral, one ground.
If you plan to eventually go 50A, have the system wired to support both. A 50A/240V 4 wire from the main breaker box feeding the "trailer box". That box will be like what you see in campgrounds with one 50A/240V breaker and usually 2 120V breakers, a 30A feeding a 30A RV outlet a 20A/120V feeding a 20A duplex outlet and a 50A/240V breaker feeding the 50A outlet.
Note: The trailer will use the 50A 240V as TWO 120V/50A circuits, I don't know of any trailer that actually have any 240V appliances, although it would be possible to do.
Just make sure the don't wire the 30A as a 240V circuit!!!
https://www.homedepot.com/p/GE-RV-Panel-with-50-Amp-and-30-AMP-RV-Receptacles-and-a-20-Amp-GFCI-Receptacle-GE1LU532SS/203393689
Or just install a 50A circuit and use a 50-30 dogbone, Later if you decide you want a 30A outlet it can be added
Don't start with 30A, you'll basically redo everything going to 50A.
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