A small-scale hydroelectric plant has a generator with a rated output of 50 kW. The generator is connected to a single-phase, 120/240V service. What is the minimum conductor size required for the generator branch circuit, according to 2026 NEC Article 690.31(A)?
- A6 AWG
- 8 AWG
- C10 AWG
- D12 AWG
Exam tip
Always check the rated output and the specific requirements for the conductor size in the NEC.
Why B is correct
According to 2026 NEC Article 690.31(A), the minimum conductor size for a generator branch circuit is 8 AWG for systems with a rated output of less than 100 kW. Options a, c, and d are not the correct minimum conductor size for this scenario.