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 3,6,8, 10, 12, and 14 AWG with lengths of 15FT,25FT, 50FT,75FT, 100FT,150FT,200FT, and 250FT 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.