In a heavy starting motor, the resistor leads must have current capacity at least what percent?

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Prepare for the New York City Electrician Test. Study with flashcards and multiple choice questions, each question has hints and explanations. Get ready for your exam!

Multiple Choice

In a heavy starting motor, the resistor leads must have current capacity at least what percent?

Explanation:
When you use a resistor starter for a heavy motor, the resistor leads must be sized to carry the current that flows during starting without overheating. The starting current in this setup is limited by the resistor, so the leads are chosen to handle a substantial but controlled portion of the motor’s normal current. In this context, the rule used in the test is that the resistor leads should have current-carrying capacity of at least 45% of the motor’s full-load current. This ensures the leads stay within safe temperature limits during the starting interval while not overdesigning the system.

When you use a resistor starter for a heavy motor, the resistor leads must be sized to carry the current that flows during starting without overheating. The starting current in this setup is limited by the resistor, so the leads are chosen to handle a substantial but controlled portion of the motor’s normal current. In this context, the rule used in the test is that the resistor leads should have current-carrying capacity of at least 45% of the motor’s full-load current. This ensures the leads stay within safe temperature limits during the starting interval while not overdesigning the system.

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