My Chicken Coop is about 100 yards from the house, and I buried my extension cord about 10 inches in the ground all the way out to it..and have not had any problems for a year.it is attached to a power strip, that I have a heat light and security cameras plugged into..I like to see my chickens on TV, to make sure they are ok..I thought about digging it up and putting it inside some PVC pipe, but just have not gotten around to it