Would it be safe to use a three way switch to run two different hots to one outlet. Our RV is 30 amp, with two A/C’s. Both running they pull 24 amps, so one has to be shut off for the microwave. I can get a separate 20 amp supply most times we stop. The switch is rated 20 amps. Is there another way?
The problem is ordinary switches only switch hot, but with a second source you need to switch neutral to go to that source as well.
One possible fix is to wire up a separate inlet outside wired to one receptacle inside and move the microwave plug between the "main" receptacle and this new dedicated secondary supply when needed.