What is the maximum temperature rating of a THHN conductor in a dry location?

The maximum temperature rating of a THHN conductor in a dry location is indeed 194°F. This rating refers to the ability of the conductor to safely carry electrical current without degradation of its insulation or performance under typical dry conditions. THHN is designed for high-temperature applications, and its thermoplastic insulation can withstand this temperature while maintaining functionality and safety.

It's important to distinguish that this rating is specific to dry environments; in wet locations, the conductor would have a different specification due to the additional factors of moisture and potential corrosion. The temperature rating is critical for ensuring that wires do not overheat, which could lead to insulation breakdown, fire hazards, or equipment failure. Understanding these ratings helps electricians and contractors choose appropriate conductors for their projects based on environmental conditions and safety considerations.