Services & DistributionQuestion 40 of 110
Absent a specific exception, what is the maximum overcurrent protection for a #12 Cu conductor?
a.30 A
b.25 A
c.15 A
d.20 A
Explanation
Under the small-conductor rule, #12 Cu is limited to a maximum overcurrent device of 20 A.
Law Reference: 2023 NEC 240.4(D)Practice all 110 questions free — no signup required.
Related questions on this topic
- 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?
- Absent a specific exception, what is the maximum overcurrent protection for a #10 Cu conductor?
- A conductor has an allowable ampacity of 115 A, which is not a standard rating. Under the next-standard-size rule (600 A or less), what is the largest permitted overcurrent device?
- What is the smallest conductor size generally permitted to be installed in parallel?
Last reviewed: · editorial process
PrepPass Editorial Team · Verified against Master Electrician Licensing Exam (NEC-based) · How we review