I found this video very interesting. After working construction for many years ,and abusing extension cords the whole time. On actual jobsite's, we would roll and unroll cords every day. They were exposed to being walked on, having carts and hand trucks roll over them, and having fork lifts roll over them a hundred times a day. Then were the times they would be hung down a stairwell for multiple floors. Our's always got beat up ,and had rips and tears. Sometimes we didn't always have the same gauge cords which means alot when your using a pipe machine, or a big drill. You can tell the difference right away when they would run slower. One of the best upgrades they ever did was to put the lighted end on he cords. If I had a dollar for every-time I went to use a drill or something, climbed a ladder, got in a comfortable position only to find the cord was dead , because somehow it got unplugged. When a job was over, the cords were beat up and either thrown away, or someone would collect them to be scrapped. Battery operated tools of every type, were making a big presence by the time I tapped out and retired.,,
