What is insulated cable? What are the raw materials of insulated cable?

What is insulated cable? What are the raw materials of insulated cable?
Insulated cables are cables that are encapsulated in the field of transmission lines with an insulating material that is not easily conductive. Generally, this type of cable has better dielectric strength than ordinary cables. At this stage, the common insulating materials that are not easily conductive are epoxy resin, plastic, PVC material, and silica gel; this kind of raw material is made into the cable sheath of the cable, which can prevent the electrical conductor from touching the outside and prevent the cable from running. Electricity or short-circuit fault conditions. From the perspective of the main purpose, the application of insulated cables is very common; most of the household appliances connection boundary cable commonly used in everyone's homes are all insulated cables; there are also many large and medium-sized multi-storey buildings, electrical equipment, and power installation projects. Insulated cables are used.
　　The type and specifications of insulated wires are also immediately related to the main purpose. Different English letters not only mean different types and specifications, but also different main uses. For example, R indicates a soft copper core wire, S indicates a category 5 twisted pair, and P indicates a shielded cable.