New York State Master Electrician Practice Exam

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How are plug fuses with a rating of 15 amperes or lower identified?

Triangle configuration
Square configuration
Hexagon configuration
Circle configuration

The correct answer is: Hexagon configuration

Plug fuses rated at 15 amperes or lower are identified by a hexagon configuration. This specific shape was standardized to help differentiate these lower-rated fuses from others, ensuring safe usage and maintenance in electrical systems. The hexagonal design is significant because it provides a clear visual identification, which is particularly useful in preventing the installation of fuses with inappropriate ratings. This standardization plays a critical role in safety measures, minimizing the risk of overloads and potential electrical hazards associated with using a higher-rated fuse in a circuit designed for lower amperage. Using the correct fuse type is essential for maintaining effective circuit protection. Therefore, being familiar with these identification methods is crucial for electricians and those working with electrical systems.