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. Per the NEC informational note to 210.19(A)(1), the maximum recommended voltage drop for a branch circuit alone is:

    Answer: 3%

    NEC 210.19(A)(1) Informational Note No. 4 recommends that the voltage drop on any branch circuit not exceed 3% for efficiency and equipment performance.

  2. Per NEC 210.4(B), a multi-wire branch circuit must have a means to simultaneously disconnect all ungrounded conductors at:

    Answer: The panelboard where the branch circuit originates

    NEC 210.4(B) requires simultaneous disconnection of all ungrounded conductors of a multi-wire branch circuit at the panelboard of origin, typically using a 2-pole or 3-pole breaker.

  3. GFCI protection for all 125-volt, 15- and 20-ampere receptacles in bathrooms of dwelling units is required by NEC:

    Answer: 210.8(A)(1)

    NEC 210.8(A)(1) specifically requires GFCI protection for receptacle outlets installed in bathrooms of dwelling units.

  4. What is the minimum individual branch circuit rating required for a household electric clothes dryer per NEC 220.54?

    Answer: 30-ampere, 240-volt

    NEC 220.54 requires household electric dryers to be calculated at 5,000 watts or the nameplate rating (whichever is larger), and standard dryers require a 30-ampere, 240-volt branch circuit.

  5. The 'high leg' conductor in a 3-phase, 4-wire delta system, which has a higher voltage to ground than the other conductors, must be identified by which color per NEC 110.15?

    Answer: Orange

    NEC 110.15 requires the conductor with the higher phase voltage to ground in a 4-wire delta system to be permanently and durably identified with orange color.

  6. Per NEC 220.14(I), each general-purpose duplex receptacle outlet on a branch circuit must be calculated at a minimum of:

    Answer: 180 volt-amperes

    NEC 220.14(I) specifies that each general-purpose receptacle outlet shall be calculated at not less than 180 volt-amperes when determining branch circuit and feeder loads.

  7. What is the minimum conductor size (AWG copper) required for a 30-ampere branch circuit per NEC Table 310.16?

    Answer: 10 AWG

    Per NEC Table 310.16, 10 AWG copper conductors have a 60°C ampacity of 30 amperes and are the minimum permitted conductor size for a 30-ampere branch circuit.