Branch Circuits & WiringQuestion 214 of 521
Per Table 310.16, what is the ampacity of a 10 AWG copper conductor in the 60°C column?
a.35 A
b.30 A
c.40 A
d.25 A
Explanation
Table 310.16 lists 30 A for 10 AWG copper at 60°C. 35 A is the 75°C value and 40 A is the 90°C value for 10 AWG copper; 25 A is the 12 AWG (75°C) value.
Law Reference: 2023 NEC §310.16Practice all 521 questions free — no signup required.
Related questions on this topic
- Under what circumstance may the 90°C ampacity column of Table 310.16 be used?
- 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 6 AWG copper conductor in the 75°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?
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