TS EN 60445

TS EN 60445 addresses the basic and safety principles for identifying equipment terminals, conductor terminations and conductors. Its purpose is to reduce ambiguity in marking practice and support correct connection, safe operation and clearer interpretation of electrical equipment interfaces.

The standard covers terminal identification for electrical equipment such as resistors, fuses, relays, contactors, transformers and rotating machines. Where applicable, it also applies to combinations of such equipment, such as assemblies. In addition, it provides general rules for identifying certain conductor terminations and for using colours or alphanumeric notations to distinguish conductors in cables, cores, busbars, electrical equipment and installations.

Why the distinctions matter

In electrical engineering, a terminal, a conductor termination and a conductor identifier are related but not identical. A terminal is the physical point where a connection is made; a termination is the way the conductor ends at that point; and identification is the marking that lets users distinguish one conductor or connection from another. Keeping those concepts separate is essential for correct wiring, maintenance work and the avoidance of connection errors.

In general technical practice, colour coding and alphanumeric marking are used to make wiring systems easier to read and to keep conductor identification consistent across equipment and installations. TS EN 60445 brings that identification logic into a common framework for the subject area covered by the document, while the detailed clause requirements remain outside this short product description.