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NCCER Electrical Module 7 Study Guide Questions and Answers | Latest Version | 2024/2025 | Correct & Verified £7.99
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NCCER Electrical Module 7 Study Guide Questions and Answers | Latest Version | 2024/2025 | Correct & Verified
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NCCER Electrical Module 7 Study Guide Questions and Answers | Latest Version | 2024/2025 | Correct & Verified Why is it important to check the continuity of a circuit before energizing it? Checking continuity ensures that the circuit is complete and free from open connections that could c...

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  • December 27, 2024
  • 10
  • 2024/2025
  • Exam (elaborations)
  • Questions & answers

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

Why is it important to check the continuity of a circuit before energizing it?


✔✔ Checking continuity ensures that the circuit is complete and free from open connections that

could cause a short or system failure when energized.




What does a voltmeter measure?


✔✔ A voltmeter measures the potential difference (voltage) between two points in an electrical

circuit.




What is the purpose of a junction box in an electrical system?


✔✔ A junction box houses wire connections, protecting them from damage and keeping them

secure.




How do you calculate the power in an electrical circuit?


✔✔ Power is calculated using the formula: P = V × I, where P is power, V is voltage, and I is

current.



1

, What is a short circuit and how does it occur?


✔✔ A short circuit occurs when there is an unintended path with low resistance, allowing excess

current to flow, potentially causing damage or a fire.




What is a lighting contactor used for in an electrical system?


✔✔ A lighting contactor is used to control lighting circuits, allowing remote or automated

switching of lights.




Why is it necessary to follow the National Electrical Code (NEC) in installations?


✔✔ The NEC provides guidelines to ensure electrical systems are safe, efficient, and code-

compliant, reducing the risk of accidents and failures.




What is the purpose of a disconnect switch in a system?


✔✔ A disconnect switch provides a means to safely isolate a circuit or equipment from its power

source for maintenance or emergency purposes.




How do you measure current in a circuit?




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