A wind turbine generator has a rated power of 10 kW and a rated wind speed of 25 mph. The turbine is installed at a height of 100 ft. What is the minimum conductor size required for the turbine to the inverter, according to Article 694.63(A) of the 2026 NEC?
- A10 AWG
- 8 AWG
- C6 AWG
- D4 AWG
Exam tip
Always refer to the specific NEC tables for conductor sizing based on current requirements.
Why B is correct
Article 694.63(A) requires that the conductor size be sized to carry the maximum current expected, which is the rated power divided by the rated wind speed. The calculation is 10,000 W / 25 mph = 400 A. Using Table 310.16, the minimum conductor size for 400 A is 8 AWG.