Is it OK to Repair Electrical Cords? Even heavy duty extension cords become damaged. Because they can be expensive, you may be asked to make a repair, rather than get a new cord. But merely re-attaching and wrapping the wires doesn't mean the repair is proper or safe. Let's review the correct way to repair electrical cords. The first obvious step is often overlooked. Unplug the cord and take control of both ends. Splices: Cut back only enough of the outer and inner insulation to make the repair. Keep in mind that the color-coded wires on one side need to be connected to...