What must be identified for each grounded conductor of an insulated feeder?

For each grounded conductor of an insulated feeder, it is essential to identify several key aspects that are crucial for safety and compliance with the National Electrical Code (NEC). Identifying the size and type of the conductor ensures that the conductor is appropriately rated for the load it will carry, which is fundamental for preventing overheating and ensuring system reliability.

In addition to size and type, knowing the phase or line and system at each termination point is vital. This identification helps in the proper connection and ensures that the feeders are correctly installed and coordinated with the overall electrical system. The identification of the phase or line and system at the connection is equally important; it aids in understanding the flow of current through the system, which is essential for troubleshooting and maintenance.

By requiring all of these identifiers — size and type, as well as the phase or line and system at both the termination and connection points — the NEC aims to enhance safety, reduce the risk of electrical faults, and ensure clear communication within the electrical infrastructure. Proper identification minimizes the chances of errors during installation and maintenance, contributing to overall system efficiency and safety. Therefore, the most comprehensive and accurate choice reflects the need to include all relevant aspects of identification for grounded conductors.