Installation of North Korean Tray-Type Cable Trays

Cable trays can be installed efficiently by following a structured process of planning, material preparation, support installation, and systematic cable laying, ensuring safety and compliance.

Planning and Design

Begin with approved shop drawings that detail the cable tray route, dimensions, installation height, support system, and the type of cables to be carried. Ensure the layout avoids interference with other services such as HVAC ducts, fire pipes, or drainage systems. Conduct a site condition check to confirm accessibility, safety, and alignment with authorized designs.

Coordination with other trades is essential to prevent clashes during installation.

Material Selection and Preparation

Select the appropriate tray type based on load and application: ladder trays for heavy power cables, perforated trays for lighter loads, or solid-bottom trays for sensitive cabling. Inspect all materials for damage or defects before installation, and store trays horizontally on flat surfaces with timber supports to prevent moisture or sunlight damage. Ensure all fittings, brackets, and accessories are available and verified against the approved drawings.

Installation Steps

Mark and Support: Mark the tray route on walls or ceilings. Install supports and brackets at recommended intervals (typically 1. 5–3 meters depending on tray type and load),.

Mounting Trays: Secure trays using clamps and connectors, ensuring they are level and aligned. Maintain vertical separation between multiple layers (e.g., 30 cm between power and communication trays) to prevent interference. Cable Laying: Lay cables neatly, using ties or straps to separate by voltage and function.

Leave slack for expansion or future adjustments. Grounding and Bonding: Metal trays must be properly grounded using bonding jumpers across sections to maintain electrical continuity and safety. Labeling and Documentation: Clearly label each cable and maintain updated wiring maps for identification and future maintenance.

Inspection and Maintenance

After installation, perform a walkthrough inspection to check for loose clamps, misalignment, overfilled sections, or unsupported spans. Routine maintenance should include checking for corrosion, loose wires, or damaged clamps to ensure long-term reliability.

Adaptation for North Korea

While specific suppliers or standards may vary in North Korea, the general principles of planning, material verification, proper support, grounding, and systematic cable management remain applicable. Using locally available materials and adapting tray types to the environment will ensure a safe, scalable, and easy-to-maintain cable tray system.