Pressure terminal or pressure splicing connectors must be _____ for the material of the conductor.

The requirement for pressure terminal or pressure splicing connectors to be identified for the material of the conductor ensures that the connectors are suitable for the specific type of conductor material being used, such as copper or aluminum. This is crucial because different materials have varying electrical and thermal properties that affect the performance and safety of the connection.

Correct identification guarantees the integrity of the electrical connection, minimizes the risk of overheating, and prevents potential failures that could arise from using an incompatible connector. For instance, a connector designed for copper may not provide a proper connection when used with aluminum conductors due to differing expansion rates and conductivity levels.

By requiring that connectors be appropriately identified per the conductor material, the NEC aims to promote safe and reliable electrical installations, reducing the likelihood of accidents or electrical failures.