What temperature is the THWN conductor rated for operating under standard conditions?

The THWN conductor, which stands for Thermoplastic Heat and Water Resistant Nylon-coated wire, is rated for a maximum operating temperature of 75 degrees Celsius (approximately 167 degrees Fahrenheit) under standard conditions. This rating allows the conductor to handle heat without degrading the insulation or leading to potential failure in typical installation environments, such as residential and commercial applications.

Understanding the operating temperature rating is crucial for ensuring safety and compliance with electrical codes, as using conductors rated for lower temperatures could result in overheating, increased resistance, and eventual failure. Conductors rated higher than this limit should not be operated at the maximum temperature for extended periods to maintain their integrity and performance. Choosing the appropriate conductor ensures optimal performance and reliability in electrical installations.