We’ve heard from several RVers via Facebook posts that they’ve been running into issues where campgrounds will not allow them to park their RV wired for 50 amp electrical service at a site with only a 30 amp post. The rule seems to be showing up at KOA campgrounds, but a KOA representative told us the company has no policy on the matter, and individual franchisees make up their own rules.

It’s very common for 50 amp RVs to use an adapter to convert their power cable to be used on a 30amp connection, but with much less capacity (50 amp service is actually 50 amp service times 2 – so 100 amps). An article posted on the KOA website suggests that 50 amp rigs tend to cause burnt-out receptacles on the campground’s power post, and that it adds strain to the system and appliances in the RV. While the latter has little factual basis, the former can be true.

In a normal set-up, you have a 50 amp rig, with a 50 amp breaker inside, which leads to a power cable rated for 50 amps, and ultimately to a 50 campground post. When a 50 amp rig plugs into a 30 amp post with an adapter, however, the breaker in the rig is no longer sized appropriately, meaning only one breaker (the one on the post) is protecting the system. This should be fine normally, but when the post is used to capacity for extended periods of time, heat can build up, especially if the connection between the plug and the receptacle is not solid. 30 amp rigs often cause the same problems, but that extra properly sized breaker helps mitigate the issue.

All RVers should be conscious of having a solid connection at the post. Consider using dielectric grease on the connector when you plug in. Also, pay attention to your power draw, especially for extended periods of time. If you are approaching the capacity of your rig, you could be causing a problem.

About author

Jason Epperson

Jason travels the country full-time with his wife Abigail, and three children.

  • Robert Petrovitch#1

    July 21, 2017

    That’s crazy.

  • Jeffrey Reich#2

    July 21, 2017

    I could accept the rationale of requiring a 30amp surge protector to be applied to the post by the user with a 50amp RV.

  • None ya#3

    July 21, 2017

    Ok I can see the why it could be an issue and maybe the campground should advise the camper of this during the time they are making the reservation. I am currently camping at a place I was seasonal for two year but no longer. I call and reserve a site and advise them I am a 37 foot class A and need a full hook up site. “No problem” I pull in, drop my jacks, put out the slides and go to plug my shore line in….wait….it’s 30 amp. So up I go to the office and I’m ask ” I did tell you I was a big class A right? Did you bother to tell me it was a 30 amp site? “Oh well…I run 30 amp on my small travel trailer and I do fine” really? It’s 100 f$&king degrees and I have to run my AC for my toddler son and wife and now I have to worry about popping fuses and breakers?” I have a surge protector and a 30 amp pony so we are up and running but now I can’t run other stuff in fear of loosing power. So now I should be worried about YOUR Wiring at the post? Yea ok….

  • Jamie#4

    September 15, 2019

    Hey Jason. I’m loving your RVMiles podcast and I’m happy to locate your website. I know this is an old post – so forgive me for raising a question slightly off the headline topic and 2 years later. Re: dielectric grease. I’m certainly not an electrician at all… and I think I understand why a park may wish to limit the number of 50A users using 30A posts. (Aside from the obvious lost revenue) However, given that dielectric grease is NOT a conductor, it is my understanding that it may not actually help, and may hinder, your connection. Instead DeoxIT (I wont post a link because you may perceive it as spam… but I’m sure you can find it) can be sprayed on connectors and post connectors to clean contacts to ensure higher quality connections clean of oxidation that can cause resistance, therefore limit easy flow of electricity and generate heat… thoughts?
    (Ps hope you are feeling much better!!!)

    • RV Miles Editors#5

      September 26, 2019

      You are absolutely right, I’ve since learned the same! I’m getting better every day! Thanks.


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