Generator 30 AMP 4-prong twist lock L14-30 receptacle in 2 ends. L14-30 female to female. AC Power Adapter Cord L14-30R to L14-30R 125V/250V, (2)L14-30 female socket. Molded with electroplate copper terminal in order to avoid surface oxidation effectively. Heavy-duty power adapter plug for generator. 100% copper conductor inside. UL 62 standard 10AWG/4C stranded cable with stranded copper inner wire, Test electrical function by UL & cUL standard.