Practice Test Geeks(PC) Professional Electrical Contractor Practice Test
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Special Occupancies and Equipment Flashcards

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  1. In a theater or similar occupancy covered by NEC Article 520, portable stage switchboards must be protected by overcurrent devices not exceeding what percentage of the switchboard's ampere rating?

    Answer: 125%

    NEC 520.25 requires overcurrent protection for portable stage switchboards not exceeding 125% of the switchboard ampere rating.

  2. According to NEC Article 525, temporary wiring for carnivals and fairs must use what minimum conductor size for branch circuits?

    Answer: 12 AWG

    NEC 525.20(E) requires all branch circuit conductors for carnivals and fairs to be not smaller than 12 AWG.

  3. Under NEC Article 690 for solar photovoltaic systems, what is the maximum voltage permitted for a PV system installed on or in a one- or two-family dwelling?

    Answer: 600 volts

    NEC 690.7(A) limits PV system maximum voltage to 600 volts for systems on or in one- and two-family dwellings.

  4. For electric vehicle charging stations covered by NEC Article 625, EVSE (Electric Vehicle Supply Equipment) installed outdoors must be listed for what environment?

    Answer: Wet locations

    NEC 625.22 requires that outdoor EVSE be listed and identified for wet locations.

  5. NEC Article 700 covers emergency systems. These systems must be tested under load within how many hours after installation and at least every how often thereafter?

    Answer: 24 hours after installation; every 6 months

    NEC 700.3(B) requires emergency systems to be tested within 24 hours of installation and at intervals not exceeding 6 months.

  6. In a health care facility critical branch, NEC 517.33 requires that the critical branch be transferred to alternate power within what maximum time after normal power failure?

    Answer: 10 seconds

    NEC 517.33 requires the critical branch of a healthcare facility to be automatically transferred to alternate power within 10 seconds of normal power loss.

  7. Per NEC Article 680, which type of luminaire is permitted to be installed less than 5 feet from the inside walls of an outdoor pool?

    Answer: Listed low-voltage luminaire operated at 15 volts or less

    NEC 680.22(B)(3) permits low-voltage luminaires operating at 15 volts or less within 5 feet of a pool if installed per manufacturer instructions.