The cord is UL and CSA approved so it suits both the U.S. and the Canadian market. This high quality power cord is made with three 6 gauge and one 8 gauge 100% copper wires. The Marine 50 amp locking connector has a twist-lock connector body and comes with a weather-proof boot with a threaded ring. This locking connector fits all 50 amp Marinco and Hubbell power inlets and is perfect for weather-proof applications. This power cord also comes with a special plug head with build-in flanges on the side. So unlike other power cords out there, you have something to hold onto when trying to unplug this gigantic cord from the power source. Please see picture.