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Safety & Compliance Regulations Flashcards

7 cards from real CEI 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 & Compliance Regulations flashcards as text

  1. Under OSHA 29 CFR 1910.333, which condition requires electrical workers to use lockout/tagout procedures before working on energized equipment?

    Answer: When voltage exceeds 50V and unexpected energization could cause injury

    OSHA 1910.333 requires LOTO when unexpected energization, startup, or release of stored energy could cause injury, specifically referencing equipment operating above 50 volts.

  2. Which NEC article specifically governs the installation of electrical systems in hazardous (classified) locations for Class I, Division 1 environments?

    Answer: Article 500

    NEC Article 500 covers electrical installations in hazardous classified locations including Class I (flammable gases/vapors), Class II (combustible dust), and Class III (ignitable fibers).

  3. A CEI inspector finds a commercial building with no arc flash hazard labels on switchgear. Which standard primarily requires these labels?

    Answer: NFPA 70E

    NFPA 70E (Standard for Electrical Safety in the Workplace) requires arc flash hazard warning labels on electrical equipment to warn workers of potential arc flash energy.

  4. When inspecting a temporary power distribution system at a construction site, the NEC requires GFCI protection for all 120V, 15A and 20A receptacle outlets. Which NEC section covers this requirement?

    Answer: 590.6(A)

    NEC 590.6(A) requires GFCI protection for all 120V, single-phase, 15A and 20A receptacle outlets on construction sites used for temporary power.

  5. Which of the following is the correct approach boundary distance for a 480V, three-phase system according to NFPA 70E?

    Answer: Restricted approach boundary is closer to the energized part than the limited approach boundary

    NFPA 70E defines approach boundaries where restricted boundary (requiring PPE and training) is always closer to the energized conductor than the limited approach boundary.

  6. An electrical inspector observes that a contractor has installed EMT conduit in a concrete slab without using anti-short bushings where wires exit the conduit ends. Which NEC requirement is violated?

    Answer: Section 358.46 requires insulating bushings or equivalent protection at conduit ends where conductors might be abraded

    NEC 358.46 requires that where EMT enters a box or fitting, a bushing or equivalent fitting must protect conductors from abrasion.

  7. During inspection of a hospital, an inspector finds that the essential electrical system was not separated into three branches as required. Which NFPA standard specifically mandates this branch separation?

    Answer: NFPA 99

    NFPA 99 (Health Care Facilities Code) requires the Essential Electrical System in hospitals to be divided into the Life Safety Branch, Critical Branch, and Equipment System.