Practice Test Geeks(CEI) Certified Electrical Inspector Practice Test
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CEI Service Entrance & Metering Inspection Flashcards

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

Read the first 6 CEI Service Entrance & Metering Inspection flashcards as text

  1. When inspecting a CT (current transformer) metering installation, why are instrument transformers used?

    Answer: To reduce high current to a manageable level for meter measurement

    CT metering uses current transformers to step down high currents to a standard 5A secondary rating, allowing revenue-grade meters to measure large loads accurately.

  2. What does NEC 230.82 specify regarding equipment connected on the supply side of the service disconnecting means?

    Answer: Listed surge protective devices and meters are permitted supply-side

    NEC 230.82 lists equipment permitted to be connected on the supply side of the service disconnecting means, including meters and surge protective devices meeting certain criteria.

  3. An inspector finds a service-entrance cable (SE cable) installed exposed on the exterior of a building. At what point must it transition to a wiring method rated for the location?

    Answer: Where it enters the building through the wall

    Per NEC 230.50, service-entrance conductors must be protected where they enter the building, and SE cable must comply with applicable wiring method requirements at the point of building entry.

  4. During inspection, a residential 200A underground service is found using aluminum conductors. What is the minimum conductor size required?

    Answer: 4/0 AWG aluminum

    NEC 310.15(B)(7) permits 4/0 AWG aluminum to serve as the ungrounded conductors for a 200A residential service.

  5. What is the NEC requirement for the identification of the grounded (neutral) service-entrance conductor?

    Answer: White or gray insulation, or white with colored stripe

    NEC 200.6 requires the grounded conductor to be identified by white or gray insulation, white with a colored stripe, or other methods for conductors larger than 6 AWG.

  6. When inspecting the service equipment of a commercial building, an inspector finds the neutral bar is bonded to the enclosure only through the main bonding jumper. Feeder panels in the building have the neutral bonded to the equipment ground. This condition is:

    Answer: Correct — the main bonding jumper belongs only at the service, and feeder panels must have neutral isolated from ground

    NEC 250.24(A) requires the system to be grounded only at the service disconnect; feeder and branch-circuit panelboards must have the neutral isolated from the equipment grounding conductor to prevent objectionable neutral current on grounding paths.