Services & DistributionQuestion 100 of 521
Where the grounding electrode conductor connects to a made rod, pipe, or plate electrode, that portion of the conductor is not required to be larger than:
a.4 AWG copper
b.6 AWG copper
c.2 AWG copper
d.1/0 AWG copper
Explanation
Per 250.66(A), the portion of the grounding electrode conductor that is the sole connection to a rod, pipe, or plate electrode need not be larger than 6 AWG copper. The 4 AWG limit is for concrete-encased electrodes, and larger sizes exceed the code requirement for a ground rod.
Law Reference: 2023 NEC §250.66Practice all 521 questions free — no signup required.
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