We had to replace as well.Our electrical is still a work in progress. The man before us didn’t have a clue what he was doing. So we have been ‘cleaning’ it up and minimizing. We put in 4 GFCI’s and I would still like to replace the rest of the outlets....little by little right lol I was hoping I could plug a heater into an extension cord for those days I close off the barn leaving them only the run in (which is connected to the barn but too far from outlet) This was another mention in the stock tank heater manual. No extension cords...but I purchased a 12 gauge anyways.