Originally Posted by nso4life
I have a 50amp trailer.
I recently purchased a Honda generator that has a three prong outlet AND a four prong outlet.
The 4 prong outlet has a 120v/240v label over it with a 120/240 switch.
I'm confused which outlet I should use and if I should have the switch on 120 or 240. I understand that 50 amps at the campground panel is 120 volts on each pole. However, I'm not sure if the generator is acting the same as the campground panel if the switch is on 240 or does the 240 switch make the generator produce 240 (220) like you would use for a home dryer or electric range? Thus frying my camper.
I know the safe option is to just convert down to the 30 amp plug but would obviously like to utilize the 120/240 if it is safe or even possible.
The 120 volts on each pole IS the same way your home works with the dryer or range.
The 50 amp camp has the same two poles with 120 volts each. Same, same, same.
HOWEVER, 99% of campers don't have any 240 devices/appliances. This is why using a dogbone adapter from a 30 amp pedestal works. In this case, you are limited in amps... but it works.
So... with regard to your generator. Since your generator puts out the same watts whether 120 only or 120/240 it really doesn't matter from your generator's standpoint. BUT, to give you the most flexibility, I would use the 120 only option and use a dogbone. This will allow you to pull more current on one leg than the other. You still can't pull more than the total, but you can choose how to use it. If you use the 120/240 option, you will be limited to the 1/2 on each leg. In other words, using only 120, you have 29 amps to use as you see fit on any combination of devices in the camper. Using the 120/240 circuit, you can't use more than 14 amps on one side of your main panel and 14 amps on the other side of your main panel. Using the 120 circuit, you could use 20 amps on one side and 9 on the other side.
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