10-50P 3-PIN Male Plug to 5-20R Female Receptacle NEMA 220-250V in 220-250V Out Power Cord Adapter - Amazon.com
What is a 220 outlet used for? - Quora
Nema Plug and Receptacle configurations
What is a 220 outlet used for? - Quora
How to Wire a 220V Outlet (with Pictures) - wikiHow
6-50P 3-Pin Male 220/250V Plug To 5-15R Standard Home Wall 110/125V 3-Prong Female Receptacle Socket Outlet Adapter, Electrical Power Connector Cord Convert NEMA UL-FX125V1020 - Amazon.com