I am looking to purchase a general purpose extension cord for around the house and yard. 50 feet would probably work, but I rather have 100 for the few times I need the extra length. I am leaning towards the 12 gauge Yellow-Jacket cords from WOODS. I understand it's inefficient to use a 100-foot cord to power a device that only needs to extend 25 feet from an outlet, but all of their 12 guage cords are rated at 15 amps. I don't understand this. Since they are all rated the same, I really want the 100. Any opinions ?