Review on Camco 50-Foot 15-Amp Extension Cord: Perfect for RV, Mobile Home, and Household Applications, Heavy-Duty (55143) by Jason Camarillo

Even the 15A version of this cable is a good powerful extension cable. The wiring is 14 gauge instead of 16, so you can actually go for it. You pay a little more and it's FAT, you can really see the difference, but it's a useful thing if you're running something that uses a lot of power, or just want to be able to. And they're surprisingly hard to find — most extension cords are only rated for 13 amps, and your circuit breakers in your house are probably 15 amps. So if you are close to the limit this might not be the best idea.