Interesting discussion. I two days ago put a double 30 into a 50 Y connector into my save list on a large online company while I made up my mind if this was really what I wanted to do. This device has a neutral line of 8 gauge which would get pretty smokin' warm if the two 30 legs were on the same side of the 240. There potentially wouldn't be any breaker protection up to 60 amps. I plan on evaluating our new trailer for normal amperage drawn by each major load to see how far under 30 amps each side of the 50 amp 240 feed can be run. Then before using the Y I would evaluate whether the two 30 outlets are on the same side or opposite sides of the 240 thus determining which loads can be run.