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Small Wind Installer 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.

Read the first 7 Small Wind Installer flashcards as text

  1. Which NEC article specifically governs the installation of small wind electric systems?

    Answer: Article 694

    NEC Article 694 covers small wind electric systems, addressing wiring methods, disconnecting means, grounding, and overcurrent protection.

  2. At what reference wind speed are small wind turbines typically rated for power output per IEC 61400-2 and AWEA standards?

    Answer: 24.6 mph (11 m/s)

    Small wind turbines are rated at a reference wind speed of 11 m/s (approximately 24.6 mph) to provide a standardized basis for comparing turbine performance.

  3. What type of generator is most commonly used in small wind turbines?

    Answer: Permanent magnet alternator

    Permanent magnet alternators are preferred in small wind turbines because they operate efficiently at variable speeds and require no external field excitation.

  4. Which tower type is generally recommended for ease of maintenance on small wind installations?

    Answer: Tilt-up (hinged) monopole tower

    Tilt-up towers can be lowered to the ground using a gin pole and winch, allowing all maintenance to be performed at ground level without climbing.

  5. What is the purpose of a dump load (diversion load) in a battery-based small wind system?

    Answer: To dissipate excess energy when the battery bank is fully charged

    A dump load absorbs surplus energy when batteries reach full state of charge, preventing overvoltage that would damage the battery bank and other components.

  6. Per NEC Article 694, at what percentage of maximum output current must conductors in small wind output circuits be sized?

    Answer: 125%

    NEC Article 694 requires small wind output circuit conductors to be rated at 125% of maximum output current because wind generation is treated as a continuous load.

  7. What protection device is required on a grid-tied small wind system to prevent the turbine from energizing utility lines during a grid outage?

    Answer: Anti-islanding protection

    Anti-islanding protection automatically disconnects the wind system from the grid during utility outages, protecting utility line workers from unexpected energization.