ktmrfs wrote:
very true. the RV 120V 30A is the "odd man out" connector system. the twist lock is the standard 120V 30A outlet. Try finding an adapter that would go from 30A female RV to 30A female twist lock. If they exist, they are very hard to come by. There is a reason there are so many 30A twist lock to 30A RV adapters. The 30A RV is only NEC approved for RV use, nothing else.
I think you mean 30A male RV to 30A female twist-lock, since female to female power adapters of any sort don't (or at least oughtn't) exist; using one would imply that there's a live male plug somewhere in the system.
Such adapters aren't super common, but they do exist.
etrailer has a few, for instance. Still, your point is well-taken; the 30TT plug and socket are definitely an odd duck and probably only still around due to inertia and history.