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NCCER Electrical Level 3 Module 3 Questions and Answers | Latest Version | 2024/2025 | Correct & Verified £7.49
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NCCER Electrical Level 3 Module 3 Questions and Answers | Latest Version | 2024/2025 | Correct & Verified
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NCCER Electrical Level 3 Module 3 Questions and Answers | Latest Version | 2024/2025 | Correct & Verified Why are ground-fault protection devices used? To detect and stop faults that could lead to electrical shock or fire hazards. What is the role of an overcurrent protection device? ...

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  • December 18, 2024
  • 13
  • 2024/2025
  • Exam (elaborations)
  • Questions & answers

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  • NCCER Electrical Level 3 Module 3
  • NCCER Electrical Level 3 Module 3

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NCCER Electrical Level 3 Module 3
Questions and Answers | Latest Version
| 2024/2025 | Correct & Verified
Why are ground-fault protection devices used?


✔✔ To detect and stop faults that could lead to electrical shock or fire hazards.




What is the role of an overcurrent protection device?


✔✔ To protect wiring and equipment from excessive current that could cause overheating or

fire.




Why is a dedicated circuit necessary for some appliances?


✔✔ To ensure these devices receive adequate power and to prevent overloading other circuits.




What is the purpose of an isolation transformer?


✔✔ To provide electrical isolation between two circuits, preventing noise or interference.




Why should electrical motors be properly grounded?


✔✔ To ensure safety and prevent electrical shock in case of a fault.


1

, What does a contactor do in an electrical circuit?


✔✔ It controls the flow of electricity to larger electrical loads.




Why is it important to balance loads across multiple phases?


✔✔ To prevent overloading one phase and to ensure efficient operation of the system.




What is the function of a capacitor in an electrical circuit?


✔✔ It stores and releases electrical energy to smooth out voltage fluctuations.




What should you check when troubleshooting a motor that won’t start?


✔✔ Check the power supply, overload protection, and the motor windings for damage.




What is the purpose of a thermal overload relay?


✔✔ To protect motors from overheating by interrupting the circuit if the motor draws too much

current.




What is the purpose of a transformer in an electrical system?


✔✔ To change the voltage level to match the needs of the system.

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