Parkworld 63487 RV 50 amp to 110 Volt adapter cord for Generator
NEMA 14-50 to 5-15R Tri-outlets
 RV 50 AMP Straight 14-50 Plug to 15 AMP 125V (3)Household Receptacle with lighted
We provide longer one for 25 Feet :
http://www.amazon.com/dp/B08996H9NL
 If you need to plugin 3 of household 15 AMP Plugs (NEMA 5-15 plug) into Recreational Vehicle 50A outlet on generator panel (for NEMA 14-50 type) to get power. 
 This power adapter cord can help you to solve your demand. 
 Length : 1.5 foot
- Recreational Vehicle / Travel Trailer / Camper Adapter cord 14-50 Plug to (3)5-15 Receptacle, 125 Volt, Max 2500 Watt.
 - RV 50 AMP 4-prong male 14-50 Plug, Household Tri-Outlet regular 15 AMP female 3-prong 5-15 Receptacle*3
 - 100% copper wire conductor inside, Used 10AWG/3C stranded copper inner wire, support max 30 Amp loading.
 - STW 10AWG/3C stranded conductor inner wire, support max 30 AMP loading.
 - Molded with electroplate copper terminal in order to avoid surface oxidation effectively.
 - Color : Black with Neon-Light in Receptacle
 - Length : 18 inches (1.5 FT)