HOLT Electricians Practice Exam

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Which Articles contain the requirements for both overload protection and short-circuit failure?

Article 100 and 200
Article 400 and 500
Article 430 Part 3 and Part 4
Article 300 and 600

The correct answer is: Article 430 Part 3 and Part 4

The correct choice highlights the specific sections of the National Electrical Code (NEC) that address essential protections for electric motors and their circuits. Article 430 focuses on the requirements related to motors, which includes guidelines for overload protection (Part 3) and short-circuit protection (Part 4). Overload protection is crucial as it safeguards motors from excessive current that could lead to overheating and potential failure. Short-circuit protection is necessary to prevent damage to electrical equipment and reduce risks to safety by interrupting power flow during a fault condition. This option directly relates to the safe operation of electric motors, ensuring that they are adequately protected from various electrical hazards. Understanding these parts of Article 430 is essential for electricians, as it governs the installation and maintenance of motor circuits effectively, emphasizing the importance of both types of protection in preventing electrical failures and ensuring system reliability.