Shop Nilight 50 Amp to 30 Amp RV Y Splitter Adapter Cord 50A Male Plug to Two 30A Female Outlet NEMA 14-50P TT-30R Pure Copper STW 10 AWG Heavy Duty Cable for RV Camper Generator in high quality, support 2 Years Warranty. Constructed with 100% pure copper with full 10 gauge wires ensuring high conductivity. The wires are stranded copper, it’s very flexible and the STW jacket is very durable.