Wire marked THHN indicates that the conductor is suitable for which of the following?

Wire marked THHN (Thermoplastic High Heat-resistant Nylon-coated) is specifically designed for general purpose use in a variety of applications. It indicates that the conductor is suitable for use in both dry and wet locations, thanks to its insulation material that provides protection against moisture to a certain extent.

This versatility makes THHN wire an excellent choice for different types of installations, including residential, commercial, and industrial environments. While THHN is typically preferred for dry installations due to its higher heat resistance, it can also be used in wet locations if necessary, especially when installed according to code and in conjunction with suitable protection measures.

The ability to use THHN wire in various environments is due to its robust design, which includes features like high-temperature durability and resistance to abrasion and oils. This ensures that it can meet the demands of diverse electrical applications effectively.