Easiest way would be to look at the power cord, there's a big difference between the 2 types, the 50 amp will be considerably larger in diameter and the pedestal end will look like its cousin, a clothes dryer plug.
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2007 Jayco Greyhawk 33DS, 8.1 Vortec, towing a 2007 Honda Element or a 2000 Mazda Miata LS.
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