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A residential electrical inspector is reviewing the installation of underground service conductors. Which of the following requirements must be met according to the 2024 International Residential Code?

ICC E1 exam practice question · Wiring Methods & Power/Lighting Distribution

A residential electrical inspector is reviewing the installation of underground service conductors. Which of the following requirements must be met according to the 2024 International Residential Code?

  • AConductors must be installed in a conduit with a minimum cover of 18 inches.
  • Conductors must be installed in a conduit with a minimum cover of 24 inches.
  • CConductors must be installed in a conduit with a minimum cover of 12 inches.
  • DConductors must be installed at least 3 feet below the surface.

Exam tip

Always verify the minimum cover requirements for underground installations to ensure compliance.

Why B is correct

The 2024 International Residential Code requires that underground service conductors be installed in a conduit with a minimum cover of 24 inches to protect against damage from backfilling and other construction activities.

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