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Special Occupancies and Equipment Flashcards

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Read the first 7 Special Occupancies and Equipment flashcards as text

  1. Per NEC 600.6, the disconnecting means for an electric sign must be located:

    Answer: Within sight of the sign

    NEC 600.6(A) requires the sign disconnecting means to be within sight of the sign, or capable of being locked in the open position if not within sight.

  2. NEC 630.11 requires conductors supplying an AC transformer arc welder to have an ampacity of not less than:

    Answer: 50% of rated primary current

    NEC 630.11(A) sets the minimum conductor ampacity for arc welders at 50% of rated primary current when accounting for duty cycle, as welders do not operate continuously.

  3. NEC 620.37 states that the ambient temperature in an elevator machine room must be maintained:

    Answer: As specified by the elevator equipment manufacturer

    NEC 620.37(B) requires the machine room environment to be maintained within the elevator equipment manufacturer's specified temperature range.

  4. Under NEC 610.32, the disconnecting means for a crane or hoist runway must be:

    Answer: Lockable and accessible or within sight of the crane

    NEC 610.32 requires the runway disconnecting means to be lockable in the open position and either readily accessible to the crane operator or within sight of the crane.

  5. Per NEC 645.10, the disconnecting means required in an information technology equipment room must disconnect:

    Answer: All IT equipment power and dedicated HVAC systems serving the room

    NEC 645.10 requires a single disconnecting means capable of de-energizing all electronic equipment in the IT room and HVAC systems dedicated to that room for emergency shutdown.

  6. Under NEC Article 640, audio distribution cables installed in a plenum space must be:

    Answer: Listed for plenum use such as CL2P or CL3P

    NEC 640.9(C) requires cables in plenum spaces to be listed for plenum use (CL2P or CL3P) due to reduced smoke and flame propagation characteristics required in air-handling spaces.

  7. NEC Article 650 governing pipe organs requires that signal wiring for the organ comply with:

    Answer: Article 650 and the applicable requirements of Article 800

    NEC 650.1 states that pipe organ installations must comply with Article 650 for power wiring and applicable portions of Article 800 for communications-type signal circuits.