A commercial office has a 3-inch diameter raceway that will contain 20 12 AWG conductors. What is the allowable fill of the raceway?
- A60%
- 70%
- C80%
- D90%
Exam tip
Always refer to Table 318.17 for the allowable fill of raceways based on their size and conductor sizes.
Why B is correct
According to 318.17(A), the allowable fill for a 3-inch diameter raceway with 12 AWG conductors is 70%.