about perfect for a 30 amp RV!
Hi, A buck/boost autotransformer? https://www.larsonelectronics.com/product/223930/1-phase-buck-boost-step-up-transformer-113v-primary-120v-secondary-31-25-amps-50-60hz Add some surge protect...
Forum Discussion
Dutch_12078 wrote:westernrvparkowner wrote:
You can look up the proposed NEC changes for yourself. The NEC isn't some proxy for irate park owners. It carries the weight of law across the country since every jurisdiction I know of requires compliance to the NEC.
NEC Article 551.20(E) "Autotransformers. Autotransformers shall not be used."
That's been in the NEC since at least the early 80's. I haven't looked back any farther than that...
That is in reference to autoformers being installed within RVs. There is nothing that prohibits exterior plug-in autoformers. The NEC actually does not cover any plug-in devices or equipment, which are covered by other standards. Extension cords and adapters aren't even required to be UL listed.
If the NEC has a proposed change to the 2020 edition on autoformers, I'd like to see a link as I couldn't find it. It may have been dropped. I doubt that'd ever work. There are other issues with RVs. low voltage and CG wiring that ought to be resolved first. How autoformers work and the implications of using them in a CG is often misunderstood.
In our travels to CGS all over the place, I've rarely actually seen autoformers being used, even when needed due to low voltage. Some RV-ers could have them hiding inside, but who knows. If a CG or the code said I couldn't plug ours in, I'd be hiding it inside somewhere and to heck with them. If most RV-ers were using an autoformer in a CG, then yes it could be a problem, but there just aren't enough out there to cause a concern. The majority of RV-ers aren't even going to know what low voltage is.
