Services & DistributionQuestion 59 of 521
A service uses 600 kcmil copper ungrounded conductors. Per Table 250.66, what is the minimum copper GEC?
a.2 AWG
b.2/0 AWG
c.1/0 AWG
d.3/0 AWG
Explanation
Table 250.66 row 'over 350 through 600 kcmil' requires 1/0 copper. 2 AWG is for up to 350 kcmil, 2/0 is for over 600 through 1100 kcmil, and 3/0 is for over 1100 kcmil.
Law Reference: 2023 NEC §250.66Practice all 521 questions free — no signup required.
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