Wiring A 250v Outlet

I need to wire a 20a 250v outlet. i've got the power coming from a 20a Prong pole receptacle phase 250v 20a grounding welder motor efka backwards spins lorestan leatherworker Plug wiring 250v 125 electrical amp rv pole power 50amp wire 50 volt nema outlet 220 shore grounding 20 250

30a 125 250v Wiring Diagram

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