Should low-voltage cables be placed with partitions in the cable tray

Low-voltage cables should be installed on dedicated cable tray partitions, separated from power cables, secured properly, and routed to minimize interference and maintain code compliance.Tray Selection and PartitioningFor low-voltage cables, use dedicated partitions or separate trays to prevent electromagnetic interference from high-voltage power cables . Common tray types include ladder trays for ventilation and support, ventilated troughs for smaller instrumentation cables, and wire mesh trays for light-duty applications . Material selection depends on the environment: painted or galvanized steel for indoor use, stainless steel or aluminum for outdoor or corrosive environments .Cable Routing and SeparationMaintain segregation between power and low-voltage cables to reduce EMI .Follow minimum bend radius requirements for low-voltage cables to prevent damage .Ensure cables are evenly spaced and do not sag between tray rungs; use cable ties or clamps at intervals to secure them .Avoid overfilling trays; calculate cable fill according to NEC Article 392 to prevent overheating .Securing and Supporting CablesUse center-hung or side-mounted supports to maintain tray stability and allow easy cable installation .Maximum support spacing typically ranges from 3 to 3.6 meters, depending on tray type and load .Secure low-voltage cables with non-metallic ties or clamps to prevent abrasion and maintain organization .Ensure horizontal deviation is ≤2 mm per meter and vertical deviation ≤3 mm per meter for proper alignment .Additional ConsiderationsFor long runs, consider intermediate supports to prevent sagging.Use solid or ventilated covers if additional protection is needed against dust or mechanical damage .Plan for future maintenance by leaving space for additional cables and labeling partitions clearly . By following these guidelines, low-voltage cables can be installed safely, efficiently, and in compliance with electrical codes, while minimizing interference and facilitating future upgrades.