[bestgenman]

The cheater box is as everyone has stated a method to use the 50A 125/250V service to our coaches from lower amperage outlets. I want to give you something to think about. Since two cords are involved, usually with 30A 125V plugs each, the ungrounded (HOT) conductors are feeding the HOT prongs of the receptacle we plug our fixed cords into. The neutrals of the cords are both landed on the neutral prong (of the 50A receptacle). Herein lies the concern, the neutral carries the unbalanced current of a 240V 3 wire circuit however, if the 30A plugs are plugged into the same leg of the (campground) receptacles so there is no voltage difference between the HOT legs of the receptacle, the #10 wire in the 30A cords could exceed 30A and melt insulation possibly causing a fire. This could be even in the campground's equipment which could expose you to some level of liability.

I realize this is quite technical but the simple resolution is to measure between the HOT legs of the 50A receptacle for 240V, plugging the 30A plugs into receptacles until you find 240V. This can also be done with 125V pilot lamps wired in series.

Just a thought!!
Gordon