Before starting any repair, the power supply must be completely disconnected to ensure a fully safe working environment. Wrapping with electrical insulating tape is a common temporary emergency measure, but for a more standardized and durable repair, a specialized heat-shrink tube should be used. Select a heat-shrink tube with an appropriate diameter and place it over the damaged area, ensuring that it extends at least 1 cm beyond both ends of the damaged section to fully cover the potential hazard. Then, use a heat gun or hot air blower to apply uniform heat, allowing the tube to shrink tightly and securely wrap around the conductor, forming a reliable insulating seal.
After the repair is completed, an insulation resistance test must be performed to confirm that the insulation performance has been restored to meet safety standards.
