How to separate the cable tray assembly

Yes, cable trays can be separated either by using physical separators within a single tray or by installing modular tray sections to segregate different types of cables.

Separation of Cables Within a Tray

Cable trays often carry both high-power and low-power cables. To prevent electromagnetic interference (EMI), these cables must be separated. This can be achieved using solid, non-combustible barriers or separators made from the same material as the tray. The height of the separator should match the tray's loading depth to ensure proper segregation and maintain safety standards . In some cases, if only MC-type cables rated 600 volts or less are installed together, a separator may not be required .

Physical Separation of Tray Sections

Cable trays are modular and can be connected or disconnected using splice plates, bolted connections, clamps, or quick-connect systems. These methods allow sections of a tray to be separated for maintenance, expansion, or rerouting of cables. Proper connections are essential to maintain system stability, load support, and grounding continuity . Modular separation also facilitates future expansion, as a minimum of 30% extra capacity is recommended when planning for additional cables .

Best Practices

• Use the correct separator type: Match the material and height to the tray for effective EMI shielding.
• Maintain NEC compliance: Ensure separation distances and fill limits are followed to prevent overheating and maintain accessibility .
• Plan for future expansion: Modular trays and removable separators make it easier to add cables without major rework .
• Secure connections: Bolted or snap-fit connections ensure trays remain stable and safe when separated or rejoined . By following these guidelines, cable trays can be safely separated while maintaining electrical safety, mechanical stability, and compliance with NEC standards.