Final answer:
The best practice is to ensure that the cable is properly insulated and protected.
Step-by-step explanation:
The best practice when you can see a copper conductor in a cable is to ensure that the cable is properly insulated and protected. This is because copper is a good conductor of electricity and can pose a safety hazard if it comes into contact with other conductive materials or if it is exposed to moisture.
To ensure safety, the copper conductor should be covered with an insulating material, such as plastic or rubber, and the cable should be properly secured to prevent any accidental contact or damage. This will help prevent electric shocks, short circuits, and other electrical hazards.
It is also important to follow any applicable safety codes and regulations when working with copper conductors in cables, such as guidelines for proper installation, grounding, and maintenance.