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General Requirements — ICC E1 Practice Questions

12 questions · 10% of the ICC E1 exam

Worked questions

1. A residential building is being constructed with a series of outdoor lighting fixtures. What is the maximum number of fixtures that can be connected to a single 15A branch circuit according to the 2023 NEC?

  • A5
  • 8
  • C10
  • D12

Exam tip

Always calculate the total current draw of fixtures to ensure compliance with the code's requirements for branch circuit capacity.

Why B is correct

According to Section 210.11(B) of the 2023 NEC, the maximum number of lighting fixtures that can be connected to a single 15A branch circuit is 8, provided that the total current does not exceed 80% of the circuit's rating.

2. An electrical inspector is reviewing the installation of grounding conduits in a new residential construction project. Which of the following is the correct requirement for the grounding of metal conduits according to the 2024 International Residential Code?

  • Metal conduits must be grounded at both ends.
  • BMetal conduits must be grounded at one end only.
  • CMetal conduits must be grounded at neither end.
  • DMetal conduits must be grounded at both ends if they are installed in a wet location.

Exam tip

Understand the requirements for grounding metal conduits in the IRC, including the requirement for grounding at both ends.

Why A is correct

According to Section 250.104(A) of the 2024 IRC, metal conduits must be grounded at both ends. Grounding at one end (Option B) or neither end (Option C) is not compliant. The requirement for grounding in wet locations (Option D) is a separate code section and does not apply to this question.

3. The electrical inspector is inspecting the wiring methods in an existing residential dwelling and comes across a section of electrical wiring that is run through a metal conduit. Which of the following is the correct requirement for the wiring method according to the 2023 NFPA 70 NEC?

  • AThe wiring method must be Type MC cable.
  • BThe wiring method must be Type NM cable.
  • The wiring method must be Type THWN cable.
  • DThe wiring method must be Type UF cable.

Exam tip

Familiarize yourself with the requirements for wiring methods in metal conduits as specified in the NEC.

Why C is correct

According to Section 330.30(B) of the 2023 NEC, when wiring is run through metal conduit, it must be Type THWN cable. Type MC cable (Option A) is suitable for direct burial but not for conduit runs, Type NM cable (Option B) is for non-metallic sheathed cable, and Type UF cable (Option D) is for underground installations.

4. You are inspecting a renovation project where the existing electrical wiring is being replaced. Which type of wiring method is not permitted in concealed spaces according to the 2024 IRC?

  • Nonmetallic sheathed cable (NM)
  • BRigid metal conduit (RMC)
  • CArmored cable (AC)
  • DFlexible metal conduit (FMC)

Exam tip

Be aware of the specific wiring methods permitted in concealed spaces to ensure compliance with the code.

Why A is correct

According to Section 330.30 of the 2024 IRC, nonmetallic sheathed cable (NM) is not permitted in concealed spaces where the cable is subject to physical damage. RMC, AC, and FMC are all permitted in such conditions.

8 more in the bank

Answers and explanations for these are in the app.

  • A residential building is being constructed with a main service panel rated at 200A. What is the minimum size of the main disconnecting means required according to the 2024 International Residential Code?
  • A residential electrical system is being installed in a new one-family dwelling. The electrical inspector encounters a grounding electrode system that consists of a single 8-foot copper water pipe. Which of the following is the correct requirement for this grounding electrode system according to the 2024 International Residential Code?
  • An electrical inspector is reviewing the installation of an electrical panel in a new residential construction project. Which of the following is the correct requirement for the installation height of the main service panel according to the 2024 International Residential Code?
  • An electrical inspector is reviewing the overcurrent protection for a new residential construction project. Which of the following is the correct requirement for the overcurrent protection of a 20-ampere branch circuit according to the 2024 International Residential Code?
  • During an inspection of an existing residential building, you find that the grounding electrode conductor is not properly connected to the grounding electrode. What is the most immediate action you should take?
  • During the inspection of an existing residential dwelling, the electrical inspector finds that the kitchen circuit has a 20-ampere circuit breaker. Which of the following is the correct requirement for the kitchen circuit according to the 2023 NFPA 70 NEC?
  • During the inspection of an existing residential dwelling, the electrical inspector notices that the bedroom circuit is not protected by an arc-fault circuit interrupter (AFCI). Which of the following is the correct requirement for the bedroom circuit according to the 2023 NFPA 70 NEC?
  • The electrical inspector is conducting a routine inspection of an existing residential dwelling and comes across a light fixture that is not grounded. Which of the following actions is required according to the 2023 NFPA 70 NEC?

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