I run my 5th wheel on generator while on private property w/out power. I hook up to the generator on the 4 prong 30 amp output. I plug into this with a 50 amp to 4 prong generator setup i made; then ...
How big is the generator? and how long is the cord run
For a 3600 watt or less genny either cord for short runs. Over 30 feet the 50 amp cord will have less loss (not sure where ther cut off is)
For a 5,000 watt generator go with the 50 amp cord.
Sounds that you are like me I have a detachable cord (like many do) with Marinco plug and outlet.. And both 30 and 50 amp cords to plug onto the inlet.
Way Way easier to wrangle the 30 amp super flex.
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