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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 'continuous load'?

    Answer: A load where the maximum current is expected to continue for 3 hours or more

    NEC Article 100 defines a continuous load as a load where the maximum current is expected to continue for 3 hours or more.

  2. In a series circuit, which statement about current is always true?

    Answer: Current is the same through every component

    In a series circuit, the same current flows through every component because there is only one path for current to travel.

  3. According to NEC Article 100, what is a 'separately derived system'?

    Answer: An electrical source with no direct electrical connection to the supply conductors of another system

    A separately derived system is a premises wiring system whose power is derived from a source with no direct electrical connection to supply conductors from another system.

  4. What is the formula for calculating electrical power in a DC circuit?

    Answer: P = V × I

    Power (P) in a DC circuit equals voltage (V) multiplied by current (I): P = V × I, also expressed as P = I²R or P = V²/R.

  5. How does the NEC define 'interrupting rating'?

    Answer: The highest current at rated voltage that a device is identified to interrupt under standard test conditions

    NEC Article 100 defines interrupting rating as the highest current at rated voltage that a device is identified to interrupt under standard test conditions.

  6. What is 'impedance' in an AC circuit?

    Answer: The total opposition to AC current flow, combining resistance and reactance

    Impedance (Z) is the total opposition to current flow in an AC circuit, combining both resistance (R) and reactance (X), measured in ohms.

  7. Under the NEC, what is the definition of 'equipment grounding conductor' (EGC)?

    Answer: The conductive path installed to connect normally non-current-carrying metal parts of equipment to the system grounded conductor

    An EGC is the conductive path(s) that provides a ground fault current path and connects normally non-current-carrying metal parts of equipment to the system grounded conductor.