There are several common methods for stripping copper wire from discarded cables. Here are some effective methods: 1. **Manual stripping**: - Use a knife: Use a sharp knife or a special wire stripper to carefully cut the insulation. Be careful not to cut the copper wire to avoid damaging it. - Tear it by hand: If the insulation material of the cable is soft, you can try to tear the insulation layer by hand. 2. **Use a wire stripper**: - There are special stripping tools on the market that can adjust the cutting depth according to the diameter of the cable, making it convenient and quick to remove the insulation layer. 3. **Hot water soaking**: - Soaking the cable in hot water for a period of time can soften the insulation material, and then it can be easily stripped with a knife or hand. 4. **Chemical method**: - Use chemical strippers and follow the instructions. These chemicals can effectively dissolve the insulation material. 5. **Power tools**: - If you have an electric wire stripper, you can quickly and efficiently process large quantities of cables. ### Precautions: - Always pay attention to safety when operating, wear gloves and goggles, and avoid cuts or contact with harmful substances. - Understand local laws and regulations to ensure that the way you handle and sell scrap metal is legal. - Keep your work environment clean and avoid environmental pollution caused by the insulation layer of cables or other materials. I hope these methods are helpful to you!