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Regulatory Compliance & Industry Standards Flashcards

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

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  1. Which OSHA standard specifically governs electrical safety-related work practices for general industry?

    Answer: 29 CFR 1910.333

    29 CFR 1910.333 covers electrical safety-related work practices for general industry, including energized electrical work.

  2. Under NEC Article 690, a PV system's ungrounded conductors must be protected by an overcurrent device located where?

    Answer: As close as practicable to the source of supply

    NEC 690.9 requires overcurrent protection as close as practicable to the source (module or battery) to minimize unprotected conductor length.

  3. What is the primary purpose of UL 1741 as it relates to inverters used in grid-tied solar systems?

    Answer: It establishes safety standards for inverters and charge controllers

    UL 1741 is the standard for inverters, converters, controllers, and interconnection system equipment for use with distributed energy resources.

  4. When a utility's interconnection agreement requires anti-islanding protection, which IEEE standard defines the requirements?

    Answer: IEEE 1547

    IEEE 1547 is the standard for interconnection and interoperability of distributed energy resources with associated electric power systems interfaces, including anti-islanding.

  5. An installer is working on a commercial rooftop PV system. Per OSHA, what is the minimum working clearance required in front of electrical panels rated 0–150 volts to ground?

    Answer: 3 feet

    OSHA 29 CFR 1910.303 and NEC 110.26 both require a minimum 3-foot working clearance (Condition 1) for equipment rated 0–150 volts to ground.

  6. Which agency enforces the Toxic Substances Control Act (TSCA) that may apply to disposal of certain PV panel materials?

    Answer: EPA

    The EPA enforces TSCA, which regulates chemical substances including cadmium telluride and lead used in some PV panel technologies.

  7. A residential solar contract must include a 3-day right of rescission under which federal regulation?

    Answer: FTC Cooling-Off Rule

    The FTC Cooling-Off Rule (16 CFR Part 429) gives consumers 3 business days to cancel door-to-door sales contracts over $25.