I have some extension cords that have twist loc ends, and the outside of the cables are between 5/8" and 3/4" thick. I think running buried 10 ga or even 8 ga. copper would be cheaper than buying 600' of those extension cords.
Well, you'd have to run conduit, buy the wire, trench 600 ft, buy another GFI outdoor outlet, a 4x4 post to mount the outlet on, tie into power somewhere, etc.......Just have to go to Home Depot or Lowe's and do the math. Hand-blading 600 ft. with a sharp-shooter would have me singing Black Spirituals in no time! LOL! Renting a trencher will cost at least $100.
