Question on wire size for 30a
I need to install a 30a RV outlet on the side of our house for our trailer. I need to go about 60 feet from the panel. Would 10/2 Romex be sufficient, or should I go bigger?
Forum Discussion
TucsonJim wrote:john&bet wrote:TucsonJim wrote:You may not use a breaker larger than 20amp on 12/2 with ground romax or a breaker bigger than 30amp on10/2 with ground romax. That is also in the NEC.
Jim
Good point - Forgot about the 20A limit on 12/2.
Jim
true for 12/2 romex, not true for #12 THHN in a raceway as long as you meet the requirements for number of conductors and raceway size.
however, the run would need to be short to avoid excess voltage drop. So, for the length the OP is talking about, #10 would be the minimum I'd use, and likely #8
remember, at the end of the run you'll likely have ANOTHER 25-50 ft of #10 cord going to the trailer, making the run near 100-125 ft
