Branch Circuits & WiringQuestion 215 of 521
Per Table 310.16, what is the ampacity of a 6 AWG copper conductor in the 75°C column?
a.55 A
b.75 A
c.65 A
d.85 A
Explanation
Table 310.16 lists 65 A for 6 AWG copper at 75°C. 55 A is the 60°C value and 75 A is the 90°C value for 6 AWG copper; 85 A is the 75°C value for 4 AWG.
Law Reference: 2023 NEC §310.16Practice all 521 questions free — no signup required.
Related questions on this topic
- Per Table 310.16, what is the ampacity of an 8 AWG copper THHN conductor in the 90°C column?
- Per Table 310.16, what is the ampacity of a 12 AWG copper conductor in the 75°C column (before any small-conductor overcurrent limit)?
- Per Table 310.16, what is the ampacity of a 10 AWG copper conductor in the 60°C column?
- Per 334.80, the ampacity of Type NM (nonmetallic-sheathed) cable is based on which temperature column of Table 310.16?
- For Type NM cable, the 90°C rating of its conductors may be used for what purpose?
- A 12-2 Type NM cable (two 12 AWG conductors plus ground) is used for a general branch circuit. Using the required NM temperature column, what is the ampacity of its 12 AWG conductors?
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