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Wiring Methods & Installation Practices Flashcards

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

Read the first 7 Wiring Methods & Installation Practices flashcards as text

  1. When installing conduit through fire-rated walls or floors, what is required?

    Answer: Fire-stop material approved for the application must seal the penetration

    All conduit penetrations through fire-rated assemblies must be sealed with approved fire-stop materials to maintain the fire rating of the assembly.

  2. What is the maximum allowable voltage for conductors installed in the same raceway using NM cable?

    Answer: 600V

    Type NM cable conductors are rated at 600V, which is the standard voltage rating for most branch circuit wiring methods in residential construction.

  3. When must a conduit body (LB, LL, LR) be sized to accommodate the conductors inside it?

    Answer: Only when used as a pull point with conductors larger than 6 AWG

    Conduit bodies used with conductors larger than 6 AWG must have a cross-sectional area of at least twice the cross-section of the largest conduit connected to it.

  4. Flexible metal conduit (FMC) is permitted to serve as the equipment grounding conductor if it meets which condition?

    Answer: FMC up to 6 feet long in circuits not exceeding 20A at 250V or less

    FMC can serve as the EGC when the total length does not exceed 6 feet, the circuit does not exceed 20 amperes, and the circuit voltage is 250V or less.

  5. What is the minimum insulation rating required for conductors installed in a raceway exposed to direct sunlight on a rooftop?

    Answer: 90°C (194°F)

    Conductors in raceways exposed to direct sunlight on rooftops must have a 90°C insulation rating and may require ampacity correction for elevated ambient temperatures.

  6. When NM cable runs parallel to framing members, what is the minimum clearance required from the edge of the framing?

    Answer: 1.25 inches

    NM cable must be kept at least 1.25 inches from the edge of framing members to protect it from nails or screws.

  7. Liquidtight flexible nonmetallic conduit (LFNC) is permitted for use in which application?

    Answer: For connections to motors and equipment requiring flexibility in wet or oily locations

    LFNC is approved for use in wet and oily locations where flexibility is needed, such as motor connections, in lengths not exceeding 6 feet.