HOLT Electricians Practice Exam

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Is it true or false that each motor must be provided with an individual controller, according to Section 430-87?

True
False
Depends on the motor type
Only for large motors

The correct answer is: True

Each motor must be provided with an individual controller according to Section 430-87 of the National Electrical Code (NEC). This requirement is in place to ensure that motors can be controlled effectively and to enhance safety measures. Individual controllers allow operators to start, stop, and adjust the speed of the motor independently, which is crucial for maintaining control over the motor's operation. This individualization also provides protection features such as overload protection and short-circuit protection, which can vary depending on the specific motor and its application. By having a dedicated controller, any issues can be diagnosed and resolved without affecting other motors in the system, promoting overall operational efficiency and safety. In cases where motors share a controller, it could lead to complications in operation and safety, thereby underscoring the importance of individual controllers as outlined in the NEC.