High-voltage cables are routed through cable trays while low-voltage cables are routed through trunking

High-voltage cables are typically routed through cable trays, while low-voltage cables are routed through trunking to ensure safety, reduce interference, and allow easy maintenance.

High-

Voltage Cables and Cable TraysHigh-voltage or power cables are generally routed through cable trays, which are open or ladder-like structures designed to support large bundles of cables. Cable trays provide: Mechanical support for heavy power cables over long distancesVentilation, reducing heat buildup and preventing insulation damageAccessibility for inspection, maintenance, and future upgradesSegregation from low-voltage cables, minimizing electromagnetic interference (EMI) that could affect sensitive instrumentation or control systems Cable trays come in various types, including ladder, perforated, and wire mesh, each suited to different cable loads and environments.

Ladder-type trays are particularly suitable for heavy-duty high-voltage cables due to their structural strength and ventilation benefits.

Low-

Voltage Cables and TrunkingLow-voltage cables, such as control, signal, or data cables, are often routed through trunking, which is an enclosed system that provides: Protection from physical damage in visible or office areasNeat and organized routing, improving aesthetics and reducing clutterReduced EMI exposure when positioned below or separate from high-voltage traysEase of maintenance, as trunking allows technicians to access cables without disturbing other systems Trunking is particularly useful in commercial buildings, data centers, and areas where cables are exposed or need to be visually unobtrusive.

Segregation and Best Practices

To maintain safety and signal integrity: Electrical trays are positioned above instrumentation or low-voltage trays to reduce EMI Minimum spacing of around 300mm (12 inches) is recommended between high-voltage and low-voltage systems, or metal partitions can be used if space is limited Straight, logical routing is preferred to minimize bends, reduce cable length, and simplify maintenance Compliance with standards such as IEC 60364 and IEC 61537 ensures proper installation, mechanical protection, and long-term reliability SummaryRouting high-voltage cables through cable trays and low-voltage cables through trunking is a standard practice that balances safety, EMI reduction, accessibility, and compliance.

Cable trays handle the structural and thermal demands of power cables, while trunking provides a neat, protected path for sensitive low-voltage cables, ensuring reliable operation and easier maintenance across industrial and commercial installations.