Installation of Norwegian Tray Cable Trays

Norwegian tray-type cable trays are installed by selecting appropriate materials, supporting them with brackets or suspensions, and ensuring compliance with load, spacing, and safety standards.

Material Selection and Tray Types

Norwegian tray-type cable trays are typically made from stainless steel, galvanized steel, aluminum, or fiberglass (FRP/GRP) depending on environmental conditions and corrosion requirements ( ). They can feature solid or ventilated bottoms, with slot patterns for cable tie placement and easy access for instrumentation or electrical cables ( ). The choice of material and finish should consider mechanical load, chemical exposure, and temperature conditions.

Support and Mounting

Cable trays must be mechanically supported using wall brackets, ceiling suspensions, or floor supports ( ). Key points include: Spacing of supports: Typically, supports are placed at intervals recommended by the manufacturer, often every 1. 5–3 meters for standard trays, to prevent sagging and maintain structural integrity.

Brackets and fittings: Use compatible fittings such as bends, T-pieces, crossovers, and reducers to maintain proper routing and alignment ( ). Suspension systems: For overhead installations, center suspensions or threaded rods can be used to secure trays to ceilings or steel structures.

Installation Practices

Alignment and leveling: Ensure trays are level and aligned along the intended cable route to avoid stress on cables. Bend radius: Maintain the minimum bend radius for cables at tray turns to prevent damage ( ). Separation of cable types: Segregate power, control, and instrumentation cables as required to reduce electromagnetic interference and facilitate maintenance ( ).

Load considerations: Verify that the tray and support system can handle the total weight of installed cables, including future expansion.

Accessories and Safety

Covers: Solid or ventilated covers can be used to protect cables from dust, moisture, or mechanical impact ( ). Cable ties and clamps: Secure cables within the tray using appropriate ties or clamps to prevent movement and maintain organization ( ). Compliance: Follow standards such as DIN EN 61537 or BS EN 61537 for design, installation, and testing of cable support systems ( ).

Maintenance and Inspection

Regular inspection is recommended to check for corrosion, loose fittings, or overloaded trays. Ensure that any modifications or additions maintain compliance with the original design and safety standards. By following these guidelines, Norwegian tray-type cable trays can be installed safely, efficiently, and in compliance with industrial standards, ensuring long-term reliability and ease of maintenance.