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Wiring and Protection Flashcards

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

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  1. Per NEC 210.11(C)(1), what is the minimum number of 20-ampere small-appliance branch circuits required for receptacle outlets in a dwelling kitchen?

    Answer: Two

    NEC 210.11(C)(1) requires two or more 20-ampere small-appliance branch circuits for kitchen, pantry, breakfast room, and dining room receptacles.

  2. What minimum branch circuit is required by NEC 210.11(C)(2) to supply dwelling unit laundry receptacle outlets?

    Answer: One 20-ampere circuit

    At least one 20-ampere branch circuit must supply the laundry receptacle outlets, and it must have no other outlets.

  3. Under NEC 210.52(A)(1), receptacles in dwelling habitable rooms must be installed so that no point along the floor line of any wall space is more than how far from a receptacle?

    Answer: 6 ft

    No point along the floor line may be more than 6 ft from a receptacle, which effectively gives a maximum spacing of 12 ft.

  4. Dwelling kitchen countertop receptacles must be placed so that no point along the wall line is more than how far, measured horizontally, from a receptacle outlet?

    Answer: 24 in.

    NEC 210.52(C)(1) limits the distance to 24 in., so receptacles end up no more than 48 in. apart.

  5. Which of the following is NOT a standard ampere rating for fuses and inverse time circuit breakers per NEC 240.6(A)?

    Answer: 75 A

    Table 240.6(A) lists 70, 80, and 90 A as standard ratings, but 75 A is not listed.

  6. Per NEC 210.11(C)(3), at least one 20-ampere branch circuit must supply bathroom receptacle outlets. Which statement about that circuit is correct?

    Answer: It may supply other bathroom equipment if it serves only a single bathroom

    A bathroom receptacle circuit may serve only bathroom receptacles, unless it supplies a single bathroom, in which case it may also feed other equipment in that bathroom per 210.23(A) limits.

  7. Per NEC 210.8(A), which 125-volt through 250-volt receptacles in a dwelling unit require GFCI protection?

    Answer: Those in garages and accessory buildings with floors at or below grade

    Garages and accessory buildings are among the dwelling locations listed in 210.8(A) that require GFCI protection.