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National Electrical Code (NEC) Flashcards

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

Read the first 6 National Electrical Code (NEC) flashcards as text

  1. Per the NEC, what is the minimum headroom clearance required in front of electrical panels?

    Answer: 6 feet

    NEC 110.26 requires a minimum of 6 feet 6 inches headroom, but 6 feet is the minimum working clearance at the panel face.

  2. What is the NEC requirement for the minimum working space depth in front of a 120/240V residential panel?

    Answer: 30 inches

    NEC 110.26(A)(1) requires a minimum working space of 3 feet (36 inches) in front of electrical equipment up to 150V to ground.

  3. Which NEC article covers swimming pools, fountains, and similar installations?

    Answer: Article 680

    NEC Article 680 covers the special electrical requirements for swimming pools, hot tubs, spas, and fountains.

  4. According to the NEC, what is the maximum voltage drop allowed for branch circuits serving general lighting and receptacle loads?

    Answer: 3%

    The NEC recommends a maximum of 3% voltage drop for branch circuits to ensure adequate power delivery.

  5. Under the NEC, AFCI protection is now required in which residential room?

    Answer: Bedroom

    AFCI protection has been required in bedrooms since the 1999 NEC and has since expanded to most living areas.

  6. The NEC defines a 'feeder' as all circuit conductors between what two points?

    Answer: Main panel and branch circuit overcurrent device

    A feeder is defined as all circuit conductors between the service equipment or source of power and the final branch-circuit overcurrent device.