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Safety Standards & Regulations 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 Safety Standards & Regulations flashcards as text

  1. What NEC requirement applies to electrical panels installed in clothes closets?

    Answer: Panels are not permitted in clothes closets

    NEC 240.24(D) prohibits overcurrent devices (and therefore panels) from being located in the vicinity of easily ignitable material, which includes clothes closets.

  2. Under OSHA 1926 Subpart K, which action is required when working within 10 feet of overhead power lines rated over 50kV?

    Answer: Have the lines de-energized or maintain increased clearance per line voltage

    OSHA 1926.1408 requires that for voltages over 50kV, clearance distances increase beyond 10 feet, and work may only proceed if lines are de-energized or proper clearance is maintained.

  3. What is the voltage threshold above which OSHA requires electrical equipment to be guarded against accidental contact?

    Answer: 50 volts

    OSHA 1910.303(g) requires guarding of live parts operating at 50 volts or more to prevent accidental contact.

  4. Which type of fire extinguisher is rated for use on electrical equipment fires?

    Answer: Class C

    Class C extinguishers use non-conductive agents (CO2 or dry chemical) rated for energized electrical equipment fires.

  5. An apprentice notices a coworker bypassing a GFCI on a construction site. What is the correct action?

    Answer: Report it to the supervisor or safety officer immediately

    Bypassing required GFCI protection violates OSHA 1926.404(b)(1) and must be reported immediately to prevent electrocution hazards.

  6. What is 'double insulation' on power tools, and why does it affect grounding requirements?

    Answer: A UL-listed internal barrier and external housing that prevents fault current from reaching the user, eliminating the need for a grounding conductor

    Double-insulated tools have a UL-listed internal insulation system that prevents shock without a grounding conductor, so they use two-prong plugs legally.

  7. According to NEC 110.9, overcurrent protective devices must have an interrupting rating sufficient to handle:

    Answer: The available fault current at the point of application

    NEC 110.9 requires that overcurrent devices have an interrupting rating equal to or greater than the available fault current at their point of installation.