Hi happycamper002,
We had quite a long thread on this.
autoformers for dummiesMy Sola Basic has three levels of boost and one of buck. I have documented in other threads how well this works.
Nec may forbid "hard wired" installation of devices, but since my autoformer unit is a plug in device it is not forbidden and is perfectly legal. There are many thousands of these in use in Mexico and I have personal knowledge of at least five other RV'ers who use autoformers successfully.
Now, do you have anything to offer on the current thread, which has nada to do with autoformers as I'm using it for a foot rest at the moment?
happycamper002 wrote:
Contrary to popular belief, auto transformers, being a single winding doesn't boost low voltage conditions. They are merely designed to be connected directly to the single winding with a center tap (or anywhere between extreme ends of the winding) depending on what output you would expect at the load end.
In order to boost the voltage, you would need a buck/boost transformer which is basically a two-winding transformer with primary and secondary windings. Some manufacturers sell a product they call autoformer which hasn't gained any traction especially who are familiar with transformers.
Besides,NEC (National Electrical Code) forbids autotransformers in RVs because of potential over voltage if a winding is open (burned portion of the coil).