"What is an electric wire?
Electrical wires are the conductors that carry electricity from the source to your home. They're either bare or insulated, and they're usually covered in a thin layer of PVC. If they have a PVC sheath, then the PVC is colored to indicate whether the wire is a neutral, ground or hot wire in your electrical installation. We discuss wire colors in its own section in this guide.
Cables contain at least a neutral wire, ground wire and hot wire that are twisted or bonded together. Depending on its purpose, the cable may contain more wires. The wires in a cable are insulated in their own color-coded layer of PVC. The group of wires is then encased in an outer sheath to make up the single cable."