Cable type for vertical fixing in cable tray

Vertical cable trays can accommodate power, control, and communication cables, provided they are properly supported, bundled, and rated for vertical installation.

Suitable Cable Types

Vertical cable trays are designed to support a variety of cables, including: Power cables: Low, medium, and high voltage cables that are rated for vertical runs and can withstand mechanical stress and heat buildup. Control and instrumentation cables: Typically smaller gauge cables used for automation, monitoring, and control systems. These often require additional protection against bending and electromagnetic interference.

Communication and data cables: Fiber optic and twisted pair cables can be routed vertically if supported to prevent sagging and maintain bend radius. Cables must be rated for the environment, including temperature, humidity, and potential exposure to chemicals or mechanical stress.

Fixing and Support Methods

Proper fixing is critical to prevent cable damage and ensure safety: Bundling: Cables should be grouped in bundles using cable ties, straps, or banding at regular intervals, typically at the center of the bundle to balance weight. Spacing: Maintain recommended spacing between bundles to allow heat dissipation and prevent mechanical stress. Support intervals: Vertical trays require supports at intervals that account for cable weight and type.

Heavier power cables need closer support, while lighter instrumentation cables can have wider spacing. Bend radius: Ensure cables maintain their minimum bend radius when entering or exiting the tray to avoid insulation damage. Tray accessories: Use vertical bends, T-pieces, and end closures to guide cables safely and prevent sharp bends.

Material Considerations

Cable trays are typically made of steel, stainless steel, or aluminum, with finishes chosen based on corrosion resistance and environmental exposure. Stainless steel or galvanized steel is preferred for vertical runs in industrial or outdoor environments due to higher mechanical strength and durability.

Standards and Safety

Vertical cable tray installations should comply with DIN EN 61537 and BS EN 61537, ensuring that the system can safely support the weight of cables and withstand environmental conditions. Cables must not exceed the tray's load rating, and installation should be performed by competent personnel familiar with electrical safety practices. By selecting the correct cable type, maintaining proper support, and following standards, vertical cable trays can safely accommodate a wide range of electrical and communication cables.