A healthcare facility has a control circuit that operates at 277V. According to NEC 2026, what is the minimum wire size required for this circuit?
- A14 AWG
- 12 AWG
- C10 AWG
- D8 AWG
Exam tip
Use Table 310.16(B)(1) to determine the minimum wire size for control circuits based on voltage and current.
Why B is correct
The correct answer is 12 AWG because NEC 2026 Table 310.16(B)(1) specifies a 12 AWG wire for a 277V control circuit.