electrical - Existing NEMA 10-30R for dryer wired with hot hot ground instead of neutral? - Home Improvement Stack Exchange

I'd like to change the obsolete unsafe NEMA 10-30R to NEMA 14-30R so that I can safely have a smart splitter switch for dryer and EV charging. Behind the NEMA 10-30R I see 3 wires: black, white (ta

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