I often say 110 and I wasn't even alive in the 40's. Explain that? How about this, if I say I have 110 volt outlets in my house, do you assume I have a really old house with really old outlets, or do you assume I'm no electrician and I really have 120 volt outlets in my house? Does anybody really not know what the OP's original question was, or was everybody just trying to impress us with their electrical knowledge?
I would assume you are no electrician period!!!!!
The OP's original question is that he has a 50 amp RV and wants to plug into a 15 am outlet...
Its obvious.... He wants to know if its ok...
The real question is does he get one leg or two with the dog bone....