What does not describe a frayed cord?

A frayed cord typically exhibits signs of wear and damage, which makes it unsafe to use. When a cord is described as frayed, it indicates that the protective covering and wires inside may be exposed, which compromises its integrity and safety.

In the context of the options given, a well-insulated cord does not align with the definition of a frayed cord. Well insulation means that the cord is intact and fully protected against potential risks, whereas a frayed cord suggests deterioration and possible exposure to the electrical wiring, which can lead to hazards such as electric shock or fire.

The other descriptors involve various forms of damage or risk associated with frayed cords. A damaged cord and a cord that poses a risk for electric shock directly relate to the unsafe nature of a frayed cord, while a cord with visible wear suggests that it has been subjected to conditions that could lead to fraying. Therefore, the option that stands apart from the unsafe descriptions is the well-insulated cord, as it implies safety and protective measures that a frayed cord does not provide.