What is THHN wire?. Thermoplastic high heat-resistant nylon-coated wire (THHN) is the industry-standard copper electrical wire. Solid THHN Wire (12 Gauge, 150 Feet) 100% OFC Electrical Building Wire, Rated for Up to 600 Volts, Single Conductor, Nylon Jacket, UL Listed/RoHs Compliant - Red, 150ft.
eBay