Cable tray systems are recognized as a wiring method by many national and international electrical codes. Typical requirements address: Tray construction, load ratings, and materials. Support spacing, mechanical strength, and. maintain spacing or to keep cables in place when the tray is ect the minimum bend ra-dius for cables as they exit the bottom of the cable tray. The mechanical and electrical characteristics, tests, certifications, overall quality management, recommendations mentioned. SC 02 01 v1. 2 renumbered to reflect approved numbering scheme. Update to include bond pin requirements. Other updates include rebranded document template, correction of typo's, This document has been prepared by ARTC for internal use and may not be. Multicore cables on racks or trays may be bunched in a maximum of two layers. HV and LV single core cables shall be laid in trefoil groups with 150 mm clear spacing between trefoils. The person carrying out this work must be able to comply with the procedures and methods for installing enclosures for electrical cables, conductors and wiring systems. This article explains the main requirements and good practices for cable tray systems, including tray types, materials, loading, supports, bonding, cable selection, and installation details.