A residential building is being wired with 10 AWG copper conductors. What is the maximum allowable length of the conductors between the electrical panel and the first outlet in the branch circuit?
- A100 feet
- B150 feet
- 120 feet
- D180 feet
Exam tip
Always refer to the specific conductor size and the code for the maximum allowable length.
Why C is correct
According to 2026 NFPA 70 NEC Article 210.100(A), the maximum allowable length of conductors between the electrical panel and the first outlet in a branch circuit is 120 feet for 10 AWG copper conductors. Options a, b, and d exceed this limit.