parkworld Generator 20 Amp Locking 3-Prong L5-20P Plug to 20 Amp T-Blade 5-20R/5-15R Outlet Splitter Adapter(L5-20P to 5-20/15R) 884876 - The Home Depot
Amazon.com: NEMA TT-30P Male to L14-30R Female Generator Adapter Cord, 30 Amp 3 Prong to 4 Prong Generator Transfer Switch Plug Adapter, RV Outdoor Generator Cord Plug to Inlet Box, 1.5FT :
RV 30 Amp Generator Plug Adapter 3 Prong - RecPro
Power Adapter 3 prong 15 amp Male to 30 amp 110 Female RV Camper Generator Plug Outdoor Electrical Power Converter, Straight Blade TT30P to 5-15R, Mini Size (30 Male - 15 Female, Yellow) - Walmart.com
Four Prong Twist Lock Generator Plug
AC WORKS® Generator L14-30P 30A 4-Prong Plug to 10-30R 3-Prong Dryer – AC Connectors