What is the insulation temperature rating of type THWN wire when installed in a wet location?

The insulation temperature rating of Type THWN wire when installed in a wet location is indeed 75°C. This rating is significant for ensuring safe operation under conditions where the wire may be exposed to moisture. THWN wire is specifically designed for use in areas where it might come into contact with water, and its insulation is built to withstand higher temperatures while maintaining integrity in such environments.

When using wiring in wet locations, choosing an appropriate wire with the correct temperature rating is crucial for preventing overheating and ensuring the longevity of the wire. The 75°C rating indicates that the insulation can safely handle temperatures of up to 75 degrees Celsius, which is advantageous for applications that might involve increased load or heat generation. This rating helps in determining the wire's capacity to safely carry current without compromising its insulation properties, particularly in scenarios where moisture presence is a factor.