Which of the following best identifies the source for overcurrent device minimum requirements?

• A. National Electrical Code
• B. National Electricity Code
• C. National Engineering Council
• D. National Electrical Network Code

Answer: (D)

Overcurrent protection is defined by the National Electrical Code, which sets the minimum sizing and rating rules for protective devices (fuses and circuit breakers) to guard conductors and equipment from overloads and faults. The NEC connects the conductor ampacity, the load it serves, and the protection device rating, so devices are sized not to exceed what the conductor can safely carry and to trip quickly enough to prevent damage. It also covers how protection should be coordinated with upstream devices for selective protection. The other options aren’t the recognized standard used to establish these minimum requirements in this context.