Services & DistributionQuestion 32 of 110
A service uses #2/0 Cu ungrounded conductors. What is the minimum copper grounding electrode conductor?
a.#8 AWG
b.#6 AWG
c.#2 AWG
d.#4 AWG
Explanation
For service conductors over 1/0 through 3/0 Cu, the table requires a #4 Cu grounding electrode conductor.
Law Reference: 2023 NEC Table 250.66Practice all 110 questions free — no signup required.
Related questions on this topic
- What is the maximum number of service disconnecting means permitted for a single set of service-entrance conductors (each in a separate enclosure)?
- 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?
- A service has 500-kcmil Cu ungrounded conductors per phase. What is the minimum copper grounded (neutral) service conductor for bonding purposes?
- 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?
Last reviewed: · editorial process
PrepPass Editorial Team · Verified against Master Electrician Licensing Exam (NEC-based) · How we review