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General Electrical Theory & Code Definitions 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.

Read the first 7 General Electrical Theory & Code Definitions flashcards as text

  1. What is the NEC definition of 'voltage (of a circuit)'?

    Answer: The greatest root-mean-square (rms) difference of potential between any two conductors of the circuit

    NEC Article 100 defines voltage of a circuit as the greatest rms (effective) difference of potential between any two conductors of the circuit.

  2. In a parallel circuit, what is true about the voltage across each branch?

    Answer: Voltage is the same across every branch

    In a parallel circuit, the voltage across every branch is equal because each branch connects directly across the same two nodes (supply voltage).

  3. According to the NEC, what is a 'bonding jumper'?

    Answer: A reliable conductor to ensure electrical continuity and the capacity to conduct safely any fault current likely to be imposed

    NEC Article 100 defines a bonding jumper as a reliable conductor to ensure the required electrical conductivity between metal parts required to be electrically connected.

  4. What happens to total resistance when resistors are added in parallel?

    Answer: Total resistance decreases

    Adding resistors in parallel always decreases total resistance because additional current paths are provided, making it easier for current to flow overall.

  5. How does the NEC define 'outlet'?

    Answer: A point on the wiring system at which current is taken to supply utilization equipment

    NEC Article 100 defines an outlet as a point on the wiring system at which current is taken to supply utilization equipment, which is broader than just a receptacle outlet.

  6. What is 'inductive reactance' and how does it relate to frequency?

    Answer: Opposition to AC current in an inductor; it increases as frequency increases

    Inductive reactance (XL = 2πfL) is the opposition to AC current in an inductive element, and it increases proportionally with increasing frequency.

  7. Under the NEC, what is the 'grounded conductor'?

    Answer: A system or circuit conductor that is intentionally grounded

    NEC Article 100 defines grounded conductor as a system or circuit conductor that is intentionally grounded, which is typically the neutral conductor in most systems.