Practice Test Geeks(CEI) Certified Electrical Inspector Practice Test
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Branch Circuit & Feeder Inspection Flashcards

7 cards from real CEI practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.

Read the first 7 Branch Circuit & Feeder Inspection flashcards as text

  1. Which NEC article governs the installation requirements for feeders, including their overcurrent protection and conductor sizing?

    Answer: Article 215

    NEC Article 215 covers feeders — the conductors and equipment between the service equipment and the final branch circuit overcurrent devices.

  2. Per NEC 215.2(A)(1), feeder conductor ampacity must be not less than which of the following?

    Answer: 100% of non-continuous load plus 125% of continuous load

    NEC 215.2(A)(1) requires feeder ampacity to equal 100% of non-continuous loads plus 125% of continuous loads to account for heat buildup during sustained operation.

  3. Under the 10-foot feeder tap rule per NEC 240.21(B)(1), which condition must be met for a tap conductor to be installed without overcurrent protection at the tap point?

    Answer: The tap conductor must not exceed 10 feet and terminate in a single OCPD

    Per NEC 240.21(B)(1), tap conductors not over 10 feet must be enclosed, not over 10 feet long, and terminate in a single circuit breaker or set of fuses that limit the load to the tap conductor's ampacity.

  4. Which conductor in a feeder must be identified by white or gray insulation, or three continuous white stripes for sizes 6 AWG and smaller per NEC 200.6?

    Answer: Grounded (neutral) conductor

    NEC 200.6 requires grounded conductors (neutral) 6 AWG and smaller to be identified by continuous white or gray insulation, or three continuous white stripes.

  5. Per NEC 230.79(C), what is the minimum rating for the service disconnect for a single-family dwelling unit?

    Answer: 100 amperes, 3-wire

    NEC 230.79(C) mandates a minimum 100-ampere, 3-wire service disconnect for single-family dwellings to accommodate modern electrical loads.

  6. When a feeder is tapped under the 25-foot tap rule (NEC 240.21(B)(2)), what is the minimum ampacity required for the tap conductor?

    Answer: Not less than 1/3 the ampere rating of the feeder OCPD

    Per NEC 240.21(B)(2), the 25-foot tap rule requires the tap conductor ampacity to be not less than 1/3 the rating of the feeder overcurrent device.

  7. An inspector finds that feeder conductors supplying a panelboard are routed through a wall without any protection. The feeder is not in conduit and passes within 1.25 inches of the edge of a wood stud. What violation exists?

    Answer: The conductors require nail plates per NEC 300.4(A)(1)

    NEC 300.4(A)(1) requires steel nail plates at least 1/16 inch thick when cables or conductors pass through bored holes within 1.25 inches of the edge of a framing member.