Enamelled wire cable typically consists of a thin copper wire that is coated with a layer of enamel insulation. In some cases, this wire may be used as is, without any additional insulation or jacketing. However, in other applications, the wire may be used in a cable configuration, with additional layers of insulation and jacketing materials.
The inner jacket of an enamelled wire cable provides a layer of additional insulation and protection for the wire. This can help to prevent damage to the wire, as well as protect it from external factors such as moisture, heat, or abrasion. The inner jacket may be made of materials such as PVC or polyethylene, and is typically applied directly over the enamel insulation.
The outer jacket of an enamelled wire cable provides further protection for the cable as a whole. This layer of insulation may be thicker and more durable than the inner jacket, and can help to protect the cable from more severe environmental conditions, such as exposure to chemicals or extreme temperatures. The outer jacket may be made of materials such as polyurethane, Teflon, or silicone, and is typically applied over the inner jacket.
Overall, the purpose of the inner jacket and outer jacket in an enamelled wire cable is to provide additional insulation and protection for the wire, as well as protect the cable as a whole from external factors that could potentially damage or interfere with its performance.