In the context of electrical conductors, what does the acronym THHN stand for?

The acronym THHN stands for Thermoplastic High Heat Non-metallic, which describes a specific type of insulation used on electrical conductors. This designation indicates that the wire is made from a thermoplastic material, allowing it to withstand high temperatures, typically rated for up to 90 degrees Celsius in dry locations. The term "non-metallic" refers to the fact that the insulation is not made from metal, which is crucial for preventing electrical conductivity in unintended areas and ensuring safety.

Understanding this terminology is important for selecting the right type of wiring for various applications, especially in environments that may expose the conductors to heat. The properties of THHN wire make it suitable for both residential and industrial electrical installations, allowing for flexibility in installation while maintaining safe operational standards.