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Bear with me oh knowledgeable ones. I sort of understand the electrics but maybe missing details for happy confidence. My dryer safety ignorance has always bothered me.
I’d like to understand why Americans were not dying in droves for the 70 years that we owned 3 prong 220 dryers…
3 prong dryers run with two blacks and a neutral that was bonded to chassis, so a combined neutral/ ground. The two blacks are 180 out of phase meaning there’s no output to neutral?
To convert 3 prong to 4 you must disconnect all places where white touches chassis, then connect 4 prong ground to chassis. Right? Are there cases where this ‘conversion’ is non trivial? Is such a conversion from 3 prong actually necessary?
What would be wrong with ignoring 4 prong ground and wiring 3 prong dryer as is (using white as chassis ground.)
What is the case where this makes people sad?
Thanks!
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