THHN (Thermoplastic High Heat-Resistant Nylon-Coated) wire is a versatile and durable electrical wire designed for a wide range of applications, including residential, commercial, and industrial wiring. Known for its heat and moisture resistance, THHN wire features a tough thermoplastic insulation with a nylon jacket that enhances protection against abrasion, chemicals, and oil. It is commonly used for conduit and cable tray installations, making it ideal for both indoor and outdoor use. Available in various gauges and colors for easy identification, THHN wire meets industry standards, including UL-listed safety requirements, ensuring reliable and efficient electrical performance.