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NCCER Electrical Module 3 Questions and Answers | Latest Version | 2024/2025 | Correct & Verified $9.41
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NCCER Electrical Module 3 Questions and Answers | Latest Version | 2024/2025 | Correct & Verified
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NCCER Electrical Module 3 Questions and Answers | Latest Version | 2024/2025 | Correct & Verified What is the purpose of insulation on electrical wiring? To prevent electrical current from escaping and protect against short circuits or shocks. Why is copper commonly used as a conductor ...

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  • December 18, 2024
  • 14
  • 2024/2025
  • Exam (elaborations)
  • Questions & answers

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  • nccer electrical module 3 questions and answers

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  • NCCER Electrical Module 3
  • NCCER Electrical Module 3

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NCCER Electrical Module 3 Questions
and Answers | Latest Version | 2024/2025
| Correct & Verified
What is the purpose of insulation on electrical wiring?


✔✔ To prevent electrical current from escaping and protect against short circuits or shocks.




Why is copper commonly used as a conductor in electrical wiring?


✔✔ It has high conductivity and is resistant to corrosion.




How can you determine the size of a wire?


✔✔ By measuring its diameter or referring to the American Wire Gauge (AWG) system.




Why is it important to use the correct size conduit for wiring?


✔✔ To ensure wires fit without being pinched or crowded, which could cause overheating.




What is the function of a GFCI outlet?


✔✔ To shut off power if it detects a ground fault or current imbalance, preventing electrical

shocks.

1

, Why should you always de-energize a circuit before working on it?


✔✔ To eliminate the risk of electrical shock or injury.




How can you test for voltage in a circuit?


✔✔ By using a multimeter or voltage tester.




What is the difference between AC and DC current?


✔✔ AC current flows in alternating directions, while DC current flows in one direction.




What is the purpose of a wire nut?


✔✔ To connect and insulate two or more wires securely.




How do you identify a hot wire in a standard residential circuit?


✔✔ It is typically black or red in color.




What does a single-pole switch control?


✔✔ It controls one circuit or device from a single location.

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