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Swimming Pools & Similar Installations — ICC E1 Practice Questions

6 questions · 5% of the ICC E1 exam

Worked questions

1. A residential swimming pool has a dedicated 20-ampere branch circuit. Which of the following is a correct requirement for the equipment grounding conductor (EGC) in this circuit?

  • AThe EGC must be 10 AWG copper.
  • The EGC must be 12 AWG copper.
  • CThe EGC must be 14 AWG copper.
  • DThe EGC can be omitted if the circuit is protected by a ground-fault circuit interrupter (GFCI).

Exam tip

Always check the specific requirements for the grounding conductor size for different circuit ratings.

Why B is correct

According to 2024 IRC Section 680.26, the equipment grounding conductor for a 20-ampere branch circuit supplying a swimming pool or similar installation must be 12 AWG copper. Option A is incorrect because 10 AWG is too large, and option C is incorrect because 14 AWG is too small. Option D is incorrect because the EGC cannot be omitted.

2. A residential swimming pool has a pool heater that is installed outdoors. What is the minimum grounding requirement for the heater according to the 2024 IRC?

  • AA single grounding electrode.
  • A single grounding electrode with a minimum length of 8 feet.
  • CA single grounding electrode with a minimum length of 10 feet.
  • DA grounding electrode system consisting of two electrodes.

Exam tip

Be familiar with the specific grounding requirements for outdoor pool heaters.

Why B is correct

According to 2024 IRC Section 680.26, the grounding electrode for an outdoor pool heater must be a single electrode with a minimum length of 8 feet. Options A, C, and D are incorrect because they do not meet the specific grounding requirements.

4. A swimming pool has a lighting fixture that is installed underwater. What is the minimum voltage requirement for this fixture according to the 2023 NEC?

  • 120V
  • B120/240V
  • C208V
  • D277V

Exam tip

Remember the specific voltage requirements for underwater lighting fixtures as they are different from standard installations.

Why A is correct

According to 2023 NEC Article 410.16(A), underwater lighting fixtures must be installed at not less than 120V. Options B, C, and D are incorrect because they exceed the minimum voltage requirement.

6. A swimming pool has a pool pump that is controlled by a time clock. What type of circuit is required for the time clock according to the 2023 NEC?

  • Single-phase, 120V
  • BSingle-phase, 240V
  • CThree-phase, 208V
  • DThree-phase, 277V

Exam tip

Ensure that you understand the specific requirements for the circuit type for pool pump time clocks.

Why A is correct

According to 2023 NEC Article 410.10(B), a time clock for a pool pump must be installed on a single-phase, 120V circuit. Options B, C, and D are incorrect because they do not meet the specific circuit requirements for a time clock.

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