Which type of conductor is required to have overcurrent protection at its point of supply under NEC guidelines?

Under the National Electrical Code (NEC) guidelines, all conductors must have overcurrent protection at their point of supply. This requirement is in place to ensure that conductors do not carry more current than they are rated for, which can lead to overheating and potential fires. Overcurrent protection helps prevent damage to the conductor by disconnecting the power supply in the event of a fault or overload condition.

This requirement underscores the importance of protecting conductors throughout the entire electrical system, not just at branch levels or specific sections. By providing overcurrent protection for all conductors, compliance with safety standards is maintained, ensuring both the integrity of the electrical system and the safety of the facility and its occupants.

In contrast, limiting overcurrent protection to specific types of conductors—such as just branch, feeder, or service conductors—would create gaps in safety. If one type of conductor was not protected, it could lead to risks including overheating and system failure. Thus, the NEC emphasizes comprehensive protection for all conductors to promote overall electrical safety.