HOLT Electricians Practice Exam

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Study for the HOLT Electricians Test. Prepare with flashcards and multiple choice questions, each accompanied by hints and explanations. Ace your exam!

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Conductors for motors and control devices are required to be made of which type of wire?

Aluminum
Copper
Steel
Plastic

The correct answer is: Copper

The requirement for conductors used in motors and control devices to be made of copper stems from copper's excellent electrical conductivity, which is substantially higher than that of aluminum and other materials. This high conductivity allows for efficient transmission of electrical current, minimizing energy loss and heat generation during operation. Copper is also known for its durability and resistance to corrosion, which is essential in maintaining reliable functionality in various environments where motors are typically used. Its ability to withstand mechanical stress and high temperature without degrading makes it suitable for applications that involve motor control. In contrast, while aluminum can be used for some wiring applications due to its lighter weight and lower cost, it has a lower conductivity compared to copper and can suffer from issues like oxidation that can lead to increased resistance and potential overheating. Materials like steel and plastic do not possess the necessary properties for effective electrical conduction required in motor applications, making them unsuitable choices for this purpose.