New York State Master Electrician Practice Exam

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Study for the New York State Master Electrician Exam. Prepare with detailed questions and thorough explanations. Boost your confidence and ace your exam!

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Panel boards equipped with snap switches rated at what amperage or less shall have over-current protection not exceeding 200A?

20 Amps
30 Amps
40 Amps
50 Amps

The correct answer is: 30 Amps

The correct answer is 30 Amps because panel boards equipped with snap switches rated at this amperage provide adequate over-current protection while ensuring safety and compliance with the National Electrical Code (NEC) standards. The NEC specifies that snap switches, when utilized in a panel board setup, must not have over-current protection exceeding 200 Amps for certain amperage ratings. Specifically, when the snap switch is rated at 30 Amps or less, it ensures that the system is capable of handling reasonably expected load demands without unnecessary risk. Choosing a higher amperage, such as 40 or 50 Amps, would lead to potential overloading situations, thus increasing the risk of equipment failure or fire hazards. Likewise, selecting 20 Amps would fall below the specified range and not align with the requirements, making 30 Amps the appropriate threshold for implementation in such applications.