What requirement pertains to conductors under a single terminal?

The requirement that conductors under a single terminal must be the same gauge and composition is based on safety and performance standards in electrical systems. When conductors of different gauges or compositions are connected under a single terminal, it can lead to several problems, including inconsistent current flow, increased resistance, and potential overheating.

Using conductors that are the same gauge ensures that they can handle the same amount of current safely without any one of them being overloaded. Additionally, having the same composition—whether copper, aluminum, or another material—ensures compatibility in terms of thermodynamic properties, minimizing the risk of galvanic corrosion and ensuring a stable, reliable electrical connection.

This requirement is especially important in applications where reliability is critical, such as in cable assemblies for electronic access control systems, ensuring that all components work together efficiently and safely within the specified parameters.