What is THHN Wire?-THHN stands for Thermoplastic High Heat-resistant Nylon-coated. It features a stranded bare copper conductor, heat-resistant PVC insulation, and a tough nylon jacket — designed for 600V applications in dry locations. Flexible & Durable Construction-Stranded copper wire allows for easy installation, while the nylon coating protects against oil, abrasion, and chemicals — ideal for pulling through conduit without damage. Indoor & Outdoor (In Conduit) Use-Suitable for residential and commercial wiring inside conduit. Can also be used outdoors when installed in proper electrical conduit. Available in Multiple Sizes & Lengths-Offered in 10, 12, and 14 AWG with lengths of 25FT, 50FT, 100FT, and 200FT – great for branch circuits, lighting, and outlets. Trusted by Electricians & DIYers-XRDS -RF THHN wire meets high-quality standards for safety and reliability. Ideal for use in panels, junction boxes, and raceways. XRDS -RF Black THHN Wire – Flexible, Durable, and Code-Ready Engineered for reliability and long-term performance, XRDS-RF's black THHN wire features a stranded pure copper conductor, a high-heat thermoplastic insulation, and a rugged nylon outer jacket. Rated for up to 600 volts and 90°C (dry conditions), it's a go-to choice for residential and commercial conduit wiring. Perfectly suited for indoor applications such as panel feeders, circuit wiring, outlet connections, or branch circuits, this wire is easy to install, color-coded for identification, and built to pull smoothly through raceways.