I use a Stove plug on mine and yes, the neutral is required. Each of the elements are 110VAC and the switch inside the kiln powers the various coils in various combinations from neutral to black or red. But that's for mine. Others may have 220VAC windings.Yes, a 220 four prong plug just carries neutral so you also have 110 which you don't eed. Just don't use the neutral and between the two hot you have 220 1P. (imo electrical work is not difficult or that hard to learn, but if how to wire a 220V kiln into a say a dryer plug isn't close to obvious, please do a lot of learning into you solidly understand it or call an electrician so as to not fry yourself)
He mentioned YouTube videos all 220VAC. I originally thought my kiln was also just 220VAC. Could be most of the YouTube video produces also just mention their kiln as 220VAC. So I figured I could plug mine into the Mill or Lathe outlet with the neutral not used.For sure you have to give the oven's the correct voltage, but it seemed the OP's Q was about powering a 220V unit.
All the YouTube videos run 220 volt.
Is it possible to use and 220 4 prong appliance outlet?