What is the ampacity of an individual THWN-2 conductor at 30°C?

To determine the ampacity of a THWN-2 conductor at 30°C, it is essential to refer to the National Electrical Code (NEC) or standard reference tables that outline the current-carrying capacity of different wire types. Specifically for THWN-2 conductors, these tables provide the ampacity based on the size of the conductor and its operating temperature.

At 30°C, the ampacity for a common size of THWN-2 conductors, such as a 10 AWG conductor, is typically around 30 A. This value is recognized for installations where conditions are optimal, meaning proper spacing, insulation, and installation practices are followed.

Understanding ampacity is crucial as it ensures that conductors are not overloaded, which can lead to overheating and potentially create a fire hazard. The choice of 30 A reflects the maximum safe current that a specific size of THWN-2 conductor can carry at this temperature, making it the correct answer for the question presented.