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IEC 61537:2023 specifies requirements and tests for cable tray systems and cable ladder systems intended for the support and accommodation of cables and possibly other electrical equipment in electrical and/or communication systems installations. Where necessary, cable tray systems and cable ladder systems can be used for the arrangement of cables into groups.
This document does not apply to conduit systems, cable trunking systems and cable ducting systems or to any current-carrying parts.
This third edition cancels and replaces the second edition published in 2006. This edition constitutes a technical revision.
This edition includes the following significant technical changes with respect to the previous edition:

1. new, repositioned and renumbered figures,
2. revised classification for corrosion,
3. revised SWL test types and procedures,
4. new tests for lengths mounted vertical running horizontal and mounted vertical running vertical,
5. tests for support devices: cantilevers, pendants, C shape ceiling supports and trapeze systems,
6. new and revised annexes including use of tray as a protective earth conductor.