What does the acronym THHN stand for?

The acronym THHN stands for Thermoplastic, High Heat-Resistant, Nylon Coated. This designation is commonly used in electrical wiring and indicates specific characteristics of the wire insulation and construction.

The "Thermoplastic" component signifies that the insulation material can be reshaped upon heating, which allows for versatility in manufacturing and installation. "High Heat-Resistant" indicates that the wire can withstand elevated temperatures, making it suitable for various applications where heat buildup might be a concern. Lastly, "Nylon Coated" refers to the outer coating of the wire, which provides additional protection against abrasion and certain chemical exposures, enhancing durability.

Understanding this acronym is crucial for electrical professionals as it helps in selecting the appropriate wire for specific applications, ensuring safety and compliance with electrical codes.