A PV system with a rated output of 5 kW is installed on a residential property. The PV array is connected to a single-phase, 120/240V service. What is the minimum conductor size required for the PV array branch circuit, according to 2026 NEC Article 690.31(A)?
- A8 AWG
- 10 AWG
- C12 AWG
- D14 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 PV array branch circuit is 10 AWG for systems with a rated output of less than 10 kW. Options a, c, and d are not the correct minimum conductor size for this scenario.