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Electrical Safety and LOTO Flashcards

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  1. What voltage threshold does OSHA define as 'high voltage' for construction electrical work under 29 CFR 1926?

    Answer: Over 600 volts

    OSHA 29 CFR 1926 Subpart K defines high voltage as exceeding 600 volts, which triggers additional safety requirements.

  2. According to NFPA 70E, an arc flash hazard analysis must be updated when?

    Answer: Whenever a major modification or renovation of the electrical system occurs

    NFPA 70E requires arc flash hazard analysis to be reviewed and updated when a major modification or renovation occurs, or at intervals not exceeding 5 years.

  3. What color is OSHA's required safety color for electrical hazard warnings?

    Answer: Orange

    Orange is the OSHA-designated safety color for indicating dangerous parts of machines or energized equipment that may cut, crush, shock, or otherwise injure.

  4. A qualified electrical worker is defined by OSHA as someone who:

    Answer: Has training on hazards and construction or maintenance of electrical equipment they work on

    OSHA defines a qualified person as one who has received training in avoiding electrical hazards and the specific construction/operation of equipment they service.

  5. What is the minimum approach distance concept used to protect workers from energized electrical equipment?

    Answer: The closest distance a worker may approach energized conductors without additional protection

    Minimum approach distance (MAD) establishes the closest point a qualified worker may safely approach energized conductors, determined by voltage level.

  6. Ground fault circuit interrupters (GFCIs) are required by OSHA on construction sites for which situation?

    Answer: Receptacle outlets not part of permanent building wiring used in construction

    OSHA 29 CFR 1926.404 requires GFCI protection for all receptacle outlets that are not part of the permanent building wiring on construction sites.

  7. What is the purpose of an 'assured equipment grounding conductor program' as an alternative to GFCI protection?

    Answer: To visually inspect and test grounding conductors and equipment on a scheduled basis

    An assured equipment grounding conductor program uses scheduled visual inspections and continuity/polarity tests to ensure equipment grounding integrity as an alternative to GFCI.