This step‑by‑step approach helps you determine width, depth, support spacing, and allowable load with confidence. Plan 20–30% spare capacity for growth. Remember separation rules for. When developing our cable support OBO can offer reliable solutions for systems, three attributes are at the routing and fastening cables securely core of what we do: efficiency, resil- for each of these installation challeng-ience and safety. es in the industrial environment. Our cable support. us-trations without notice. All illustrations, descriptions and technical information included in this document are provided as indications and can cable trays are equivalent. The mechanical and electrical characteristics, tests, certifications, overall quality management, recommendations mentioned. A properly designed and installed cable tray system will provide outstanding reliability for a facility's control, communication, data, instrumentation and power systems cabling & wiring. A rung spacing of 6 to 9 inches (150 to 230 mm) is preferable when the cable tray cont d for instrumentation and control applications that require. Three numbers decide whether a cable tray installation goes smoothly or triggers a change order: Width — sum of cable diameters across the tray, with spacing, plus a margin for future additions. Depth — single-layer is ideal; multi-layer is allowed but demands derating and careful stacking rules.