Practice Test Geeks(E2) E2 Commercial Electrical Inspector Practice Test
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Plan Review and Inspections Flashcards

7 cards from real E2 practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.

Read the first 7 Plan Review and Inspections flashcards as text

  1. During a plan review, an inspector sees that the one-line diagram shows a 2000A service with a single 2000A disconnect. The building also has an emergency generator. Which NEC section governs the number and grouping of service disconnects?

    Answer: NEC 230.71, which limits service disconnecting means to a maximum of six disconnects

    NEC 230.71 permits a maximum of six disconnects for a service, and all disconnects must be grouped together.

  2. An inspector is reviewing plans for a restaurant kitchen and notices that the equipment grounding conductors for all circuits are shown as the same size. What potential issue should be investigated?

    Answer: NEC 250.122 requires EGCs to be sized based on the rating of the overcurrent device protecting each circuit

    NEC 250.122 requires equipment grounding conductors to be sized based on the ampere rating of the overcurrent protective device in the circuit, so larger circuits need larger EGCs.

  3. A commercial plan review shows a 208Y/120V panelboard feeding a dedicated computer room. The plans indicate that isolated ground receptacles will be installed. What must the inspector verify on the plans?

    Answer: That the isolated ground circuit includes an insulated equipment grounding conductor run back to the panel, and the panel enclosure is still grounded

    NEC 250.146(D) requires isolated ground receptacles to include an insulated EGC back to the source, while the panel enclosure must remain grounded.

  4. While reviewing commercial plans, an inspector finds that a rooftop HVAC unit disconnect is shown mounted on the rooftop adjacent to the unit. The unit is fed by a 460V feeder. Which requirement is most critical to verify?

    Answer: That the disconnect is located within sight of the unit and is readily accessible per NEC 430.102

    NEC 430.102(B) requires a disconnect within sight of motor-driven equipment, and NEC 430.107 requires it to be readily accessible.

  5. During a rough-in inspection of a commercial building, the inspector observes that flexible conduit (FMC) is used for the final connection to a rooftop air handler. The run is 10 feet long. What NEC requirement applies?

    Answer: FMC over 6 feet requires a bonding jumper per NEC 250.118 since it may not provide an adequate ground path

    FMC longer than 6 feet may not provide an adequate ground path, so NEC 250.118 requires a bonding jumper in parallel with FMC exceeding this limit.

  6. A commercial plan review reveals that all branch circuit conductors are shown as 12 AWG copper. Some circuits have 30A breakers for dedicated equipment. What code issue does this present?

    Answer: 12 AWG copper is only rated for 20A overcurrent protection per NEC 240.4(D), so 30A breakers are not permitted

    NEC 240.4(D) limits 12 AWG copper to a maximum 20A overcurrent device; 30A breakers on 12 AWG violate this requirement.

  7. An inspector reviewing plans for a commercial office building sees that receptacle circuits in an open office area are not shown with AFCI protection. The building is a new 2023 NEC project. What should the inspector require?

    Answer: The inspector should verify the applicable edition of the NEC adopted locally, as AFCI requirements for commercial have expanded in recent editions

    AFCI requirements have expanded with each NEC edition, and applicability in commercial spaces depends on the locally adopted code edition; the inspector must verify the adopted edition.