Services & DistributionQuestion 36 of 110
A service has 500-kcmil Cu ungrounded conductors per phase. What is the minimum copper grounded (neutral) service conductor for bonding purposes?
a.#4 AWG
b.#2 AWG
c.#1 AWG
d.1/0 AWG
Explanation
The grounded service conductor must be at least the size in Table 250.102(C)(1); for 500-kcmil Cu phase conductors that value is 1/0 Cu.
Law Reference: 2023 NEC Table 250.102(C)(1)Practice all 110 questions free — no signup required.
Related questions on this topic
- Where the grounding electrode conductor connects only to a made ground rod, what is the largest copper conductor size ever required?
- A branch circuit is protected by a 100-A overcurrent device. What is the minimum copper equipment grounding conductor?
- A feeder is protected by a 400-A overcurrent device. What is the minimum copper equipment grounding conductor?
- Service phase conductors total 1,500 kcmil Cu per phase (over 1,100 kcmil). Using the 12.5% rule, what is the minimum copper main bonding jumper?
- A panelboard is rated 225 A. What is the maximum rating of the overcurrent device that may protect it?
- Which of the following is the next standard overcurrent device rating above 95 A?
Last reviewed: · editorial process
PrepPass Editorial Team · Verified against Master Electrician Licensing Exam (NEC-based) · How we review