ALEKO® RV50-30 Heavy Duty RV Cord is capable of passing 50amp of power. Anytime you need an extension which is able to pass high currents - this cord might be your best bet. It's heavy and bulky but it's built to last and work. This one is the best for those who want to connect one end to the power box of their RV since it's got a lose end. Your house is too far from the RV, or the campsite's outlet is 30 feet away- all that is not an issue with this cable. And the best part is that you get this good quality item for a reasonable price.