Practice Test Geeks(InterNACHI) International Association of Certified Home Inspectors Practice Test
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Electrical Systems and Safety Flashcards

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

Read the first 7 Electrical Systems and Safety flashcards as text

  1. What is the minimum clearance required between the top of a residential electrical panel and the ceiling?

    Answer: 6 feet

    NEC requires at least 6 feet of headroom clearance above electrical panels to allow safe access for work.

  2. Which wire color in a standard 120V household circuit indicates the neutral conductor?

    Answer: White

    White wires are the neutral conductors in standard 120V household circuits, carrying current back to the panel.

  3. An inspector finds that a bathroom outlet is not GFCI-protected but is within 6 feet of a sink. What should be noted?

    Answer: This is a safety deficiency requiring correction

    All bathroom outlets require GFCI protection regardless of distance from a water source, per current NEC requirements.

  4. What does the term 'double-tapping' refer to in electrical panel inspections?

    Answer: Connecting two conductors to a single breaker terminal

    Double-tapping occurs when two wires are connected to a single breaker terminal, which is a defect unless the breaker is rated for it.

  5. Which of the following best describes a 'floating neutral' condition in an electrical panel?

    Answer: A neutral bus not properly bonded, causing voltage imbalance

    A floating neutral occurs when the neutral is not properly connected, which can cause dangerous voltage imbalances on 240V circuits.

  6. When inspecting older homes, what type of wiring is characterized by two conductors insulated and wrapped together in a cloth-like jacket without a ground wire?

    Answer: Knob-and-tube wiring

    Knob-and-tube wiring uses separate hot and neutral conductors supported by ceramic knobs and tubes, with no equipment ground.

  7. What is the primary safety concern when a home inspector discovers aluminum branch circuit wiring connected to a standard copper-rated outlet?

    Answer: Aluminum expands and contracts differently than copper, causing loose connections and fire risk

    Aluminum expands and contracts at a different rate than copper, causing connections to loosen over time, creating heat and fire hazards.