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

extension cord dryer, extension cord dryer Suppliers and Manufacturers at

thinkstar 3 Prong Srdt Dryer Cord 10 Feet, 30 Amp Appliance Power Cord (Nema 10-30P To 3-Wire), 3 Wires With O Ring Terminal Connect…

Leviton 30 amps 125/250 V Black Outlet 10-30R 1 pk - Ace Hardware

30 amp Splitter 3 Prong Dryer Y Splitter L-Prong NEMA 10-30P Male to 2 x NEMA 10-30R Female, 30 Amp 250 Volt 7500W STW 10 AWG Dryer Y Adapter Cord

The Little Green Wire – AC Connectors

N14-30 4 Prong 30Amp Dryer Plug to 110V 15/20Amp Receptacle Adapter,NEMA 14- 30P to 5-15/20R(4X Household 110V/120V Outlets) Converter Cord ETL Approved CSA Standard (with 2 Breakers)

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10FT 10/4 SOOW DISASTER RECOVERY <(>&<)> RESTORATION CORD WITH 14

POWERFUL DESIGN - GearIT 25 foot, 50A, 125/250V electrical power cord designed specifically to allow you to connect electric vehicle or washer/dryer

GearIT 30 Amp (25 Feet) 3 Prong Dryer Extension Cord NEMA 10-30P to 10-30R STW 10AWG/3 Heavy Duty, RV EV Charging Cable 125/250V

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NEMA 6-50P to 10-30R 240V 30 Amp 3 Prong Male Plug to 3 Prong

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

VEVOR Level 2 Portable EV Charger, 16 Amp 240V, Electric Vehicle

AC WORKS 30 Amp 250-Volt NEMA 10-30 3-Prong Dryer Plug to 2 NEMA 10-30 3-Prong Dryer Connections with Switch EVY1030SW-036 - The Home Depot