Services & DistributionQuestion 11 of 521
Ungrounded conductors are increased in size for voltage drop. What must happen to the equipment grounding conductor?
a.It stays the same as Table 250.122
b.It is increased to match the neutral
c.It is increased proportionally to the ungrounded conductor's increase in area
d.No EGC is required
Explanation
Per 250.122(B), when ungrounded conductors are upsized (e.g., for voltage drop), the EGC must be increased proportionally by the same ratio in circular-mil area. It cannot simply remain at the base Table 250.122 size, and it is never matched to the neutral.
Law Reference: 2023 NEC §250.122(B)Practice all 521 questions free — no signup required.
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