electrical - Existing NEMA 10-30R for dryer wired with hot hot

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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NEMA connector - Wikipedia

AC WORKS 1.5ft NEMA 14-30P to NEMA 10-30R 30-Amp 4-wire To 3-wire

electrical - Explain voltage readings on NEMA 10-30 socket - Home Improvement Stack Exchange

NEMA 10-30P To L6-30R Power Cord for Level 2 EV Charging (30A

NemaTech Dryer 3 Prong Splitter, NEMA 10-30P to 10-30R, 10 AWG, 30AMP, 250V and 7,500W Power Splitter for dryer outlet and Tesla Electric Vehicle EV Charging Cable (3 ft) : : Electronics

Style NEMA 10-30R Outlet. Certification UL, NEMA. ✅【 Flush Mount Power Outlet】 Flush mount receptacle feature a heavy gauge galvanized steel mounting

30 Amps 3 Prong Dryer Outlet, 125/250V Flush Mounting Power Outlet, NEMA 10- 30R

AC WORKS® [S1030PR] 30A 125/250V NEMA 10-30 3-Prong Dryer Heavy

How to Change a 4-Prong Dryer Cord and Plug to a 3-Prong Cord - Dengarden