What kind of cable is this? It is 10 AWG for a dryer outlet running 220v. It doesn't have a ground wire. See comment for more info. : r/AskElectricians
4 Prong New Electric Dryer Plug Male to 3-Prong Old Dryer Receptacle Female Connector Adapter,NEMA 14-30P to 10-30R Dryer Outlet Adapter,30A 125/250V 1.5FT - Amazon.com
Southwire 50 ft. 10/3 Solid Romex SIMpull CU NM-B W/G Wire 63948422 - The Home Depot