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NCCER Electrical Level 2 Module 7 Questions and Answers | Latest Version | 2024/2025 | Correct & Verified £7.99
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NCCER Electrical Level 2 Module 7 Questions and Answers | Latest Version | 2024/2025 | Correct & Verified
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NCCER Electrical Level 2 Module 7 Questions and Answers | Latest Version | 2024/2025 | Correct & Verified What are the safety precautions when working with electrical circuits? Always de-energize circuits before working on them, wear proper PPE, use insulated tools, and follow NEC safety ...

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  • December 27, 2024
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  • 2024/2025
  • Exam (elaborations)
  • Questions & answers

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NCCER Electrical Level 2 Module 7
Questions and Answers | Latest Version
| 2024/2025 | Correct & Verified

What are the safety precautions when working with electrical circuits?


✔✔ Always de-energize circuits before working on them, wear proper PPE, use insulated tools,

and follow NEC safety codes to prevent accidents.




How do you test a circuit breaker for proper operation?


✔✔ A circuit breaker can be tested by manually toggling it to ensure it trips when an overload or

short circuit occurs, and by using a multimeter to check for continuity when in the "on" position.




What is the function of a relay in an electrical system?


✔✔ A relay is an electrically operated switch that uses a small current to control a larger current,

often used in control circuits.




What are the components of a motor control circuit?


✔✔ The components of a motor control circuit typically include a contactor, overload relay,

motor, and control switches, which work together to control motor operation.



1

, What does "derating" mean in the context of electrical systems?


✔✔ Derating refers to reducing the ampacity of a conductor or equipment based on

environmental factors such as temperature, installation method, or number of conductors in a

conduit.




What is the purpose of an overload relay?


✔✔ An overload relay protects a motor or other equipment by disconnecting power if the current

exceeds a safe level for an extended period, preventing damage.




What is the difference between a three-way switch and a single-pole switch?


✔✔ A three-way switch allows control of a circuit from two locations, while a single-pole switch

controls a circuit from one location.




What is the function of a light dimmer switch?


✔✔ A light dimmer switch adjusts the brightness of lights by varying the amount of voltage

supplied to the fixture.




What is the function of a conduit system in electrical installations?


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