Services & DistributionQuestion 9 of 521
Service-entrance conductors are 3/0 AWG copper. Per Table 250.102(C)(1), what is the minimum copper main bonding jumper?
a.6 AWG
b.4 AWG
c.2 AWG
d.8 AWG
Explanation
The main bonding jumper is sized from Table 250.102(C)(1) based on the service conductors; for 2/0-3/0 copper it is 4 AWG copper. 6 AWG and 8 AWG are too small, and 2 AWG is not required until conductors exceed 3/0.
Law Reference: 2023 NEC §250.28Practice all 521 questions free — no signup required.
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