50 amp cheater box

[grayghost58]

I have a 50 amp 5ver someone told me about this. It has 2 30amp plugs (male) on it and a 50amp (female). So your supposed to be able to plug 1 of the 30 amp plugs into the 30 amp plug at the rv park and put a 120 adapter on the other and plug it into the 120 volt plug so long as it is not a gfi plug and be able to run both ac's on my 5ver. Of course this is at a 30 amp park where 50 amp is not available. Has anyone heard of this and if so does it work without harming anything. Do I need to run fridge and hot water on propane so there is enough power to run my ac's? We live in Oklahoma so it gets pretty hot here and are limited to where we can go because of needing to run both ac's. Any info would be appreciated

[troubledwaters]

BillyBob Jim wrote:
At the campground I am familiar with its not going to work. It will work from the standpoint that you will power up both legs of your 50 amp system, but you're not going to have more than 30 amps.

The main feed is 30 amp, the 20 amp receptacle is tapped off of that 30 amp feed. They did not run a separate/independent 20 and 30 amp feeds to the pedestal. If they would of done that they would of simply installed a 50/30/20 pedestal and if they would of, that would not mean you can somehow dog-bone 100 amps out of it.

Please let me know the name and location of this place; I want to make sure I never get close to there. The place sounds like a nightmare with duct tape and baling wire-cobbled up electrical panels and probably everything else.

[map40]

Amazon seels an adapter like that with a 30 and a 15 male plugs, but you have the GFCI problem. A friend of mine simply took off the ground of the 15 amp so it would not trip the GFCI. Not a smart idea.
I have never found a campground wired with the 15 and the 30 on the same 30 amp line, but I have heard of people that have seen them. It is against code...

[wildtoad]

FWIW I was just at a KOA in Virginia and the pedestals had a sign stating I was only allowed to use one socket, and I was responsible for any damage caused by using more than one. First time I had seen this kind of warning.

[grayghost58]

Thanks for the info.

[BillyBob_Jim]

At the campground I am familiar with its not going to work. It will work from the standpoint that you will power up both legs of your 50 amp system, but you're not going to have more than 30 amps.

The main feed is 30 amp, the 20 amp receptacle is tapped off of that 30 amp feed. They did not run a separate/independent 20 and 30 amp feeds to the pedestal. If they would of done that they would of simply installed a 50/30/20 pedestal and if they would of, that would not mean you can somehow dog-bone 100 amps out of it.

[hypoxia]

I use it quite a bit with two 30A plugs. As stated the 20A plugs are normally GFI which don't work but if you find a non GFI 20A it would work. ALWAYS test with a meter, If you read 240 VAC across the 50A plug and 120 VAC on each side to neutral and ground it should work. If it doesn't do not use it!

[bdpreece]

Bought one several years ago and was able to use it at several places the first year or so. Now almost all parks use GFCI breakers and I have not found anywhere I could use it in a long time.

[Old-Biscuit]

UL, C-UL Warning: Will not operate when plugged into a GFCI circuit, and requires two separate circuits. Always check pedestal power for proper polarity prior to plugging in this adapter.