The Extruded Polytetrafluoroethylene (PTFE) insulation allows for use in high temperature electronic applications, and protects the wire against abrasion, chemicals, oils, and solvents. Teflon coated hook up wire is used in a variety of general-purpose electrical applications. 30 AWG Gauge Stranded Hook Up Wire, 1000 ft Length, Orange, 0. Stranded silver plated copper wire provides good electrical connectivity.