How to Wire or Repair an Extension Cord : Electrical Online So there you have just a few options for the repair of a damaged extension cord rather than just discarding the damaged cord in the trash! To watch the complete video demonstrating the steps to wiring and repairing an extension cord, view below: I’m Terry Peterman, the Internet Electrician® at Electrical-online How to Replace an Extension Cord Plug | This Old House The prongs on extension-cord plugs are easily bent—and easily straightened with pliers. But after a few such restraightenings, the metal can fatigue and snap off. When a plug's life is over, it doesn't mean you need to buy a new cord. For about five bucks, you can attach a replacement plug and How to Replace Extension Cord Plugs - The Spruce It's also the only repair you should make to an extension cord. Cords with damaged sheathing, exposed wires, or other damage to the cord itself should be replaced. Just wrapping the cord with electrical tape isn't good enough. You don't know how much damage the cord has suffered, and electrical tape provides unreliable protection against shock.Author: Timothy Thiele How to Replace a Female Plug on a Extension Cord | Hunker Remove all electrical power from the extension cord before performing any service to the female plug. Inspect the length of the extension cable for any signs of cracked insulation or exposed wires. If the cord is damaged, it should be replaced in its entirety with a new extension cord.