Heavy duty Electrical power adapter: 50 Amp Male to 30 Amp Dogbone - for all RVs running 50 amps, perfect power conversion for those RV Parks only have 50 amp service,maximum loading at 125V/3750-Watt. | High quality: Heavy duty flame and anti-fire& heat resistant PVC cord- coating, Wire is made of 100% copper, excellent and stable conductive. | NEMA:14-50P to TT-30R - Rated 125V/3750W; Cord type STW | 12" length adapter,10/3 STW,made from high end 100% pure copper. | It’s used for RV,and do not exceed the rated current and rated power.