What is the degree Celsius rating for Type THW insulation when used in wiring through fixtures?

Type THW insulation is rated for a maximum temperature of 90 degrees Celsius. This insulation type is designed to withstand higher temperatures compared to some other insulation types, making it suitable for wiring in various applications, including through fixtures. The ability to operate at this elevated temperature provides flexibility in installation, especially in environments where heat can be a concern. Using insulation that can handle 90 degrees C ensures the safety and longevity of the wiring in situations where heat generation is a factor. Understanding these temperature ratings is crucial for electricians when selecting materials for specific applications, as using the appropriate insulation can prevent overheating and potential failure of electrical systems.