The PVC insulation provides excellent resistance to heat, moisture, and oil. Both types of wire feature Polyvinyl Chloride (PVC) insulation. While the tinned conductor provides greater corrosion resistance, it can be affected by humid environments, making it more ideal for dry locations. MTW and TEW Wire ConstructionĪs stated above, the main difference between these two wires is their conductor. However, most TEW is double listed as MTW wire since they may be used in similar applications. Typically, TEW has a bare copper conductor and MTW wire has a tinned copper conductor. They are types of hook-up wire approved by the national electric code to be used in switchboards, appliances, electronic circuits, control cabinets, and the wiring of machine tools. TEW stands for Thermoplastic Equipment Wire.
