Construction of Easy-to-Install Cable Trays in North Korea

Cable tray installation and cable laying in North Korea can follow international best practices, using proper planning, tray selection, and safety measures to ensure reliable electrical infrastructure.

Planning and Route Design

Before installation, a detailed route plan is essential. Cable trays should follow the shortest and straightest path possible, avoiding unnecessary detours or interference with other services. Power and signal cables should be segregated to minimize electromagnetic interference, and clearance from walls, ceilings, and other equipment must be maintained for safety and maintenance access . Reviewing approved shop drawings ensures alignment with building layouts and structural constraints .

Tray Types and Material Selection

Cable trays come in various types, including ladder trays, perforated trays, solid-bottom trays, wire mesh trays, and channel trays. Ladder trays are ideal for heavy cables and allow airflow, while perforated trays are suitable for lighter loads . Material selection depends on the environment: painted or galvanized steel for indoor use, hot-dip galvanized or stainless steel for outdoor exposure, and aluminum or fiberglass-reinforced plastic for corrosive or high-humidity areas . Tray width and thickness should match the number and weight of cables to prevent deformation .

Installation Procedures

1. Mounting and Supports: Use appropriate clamps, brackets, and hangers, spaced typically 1.5 to 3 meters apart depending on tray type and load . Ensure trays are level and aligned.
2. Cable Laying: Lay cables neatly, using ties or straps to separate by voltage and function. Leave slack for expansion or future adjustments .
3. Grounding and Bonding: Metal trays must be properly grounded with bonding jumpers across sections to maintain electrical continuity and safety .
4. Fireproofing and Safety: Follow fireproofing measures and ensure mechanical strength to prevent tray failure under full load .
5. Inspection and Documentation: Conduct final checks for loose clamps, misalignment, or overfilled sections. Label cables and maintain updated wiring maps for future maintenance .

Maintenance

Routine inspections are critical to check for corrosion, loose wires, or damaged supports. Preventive maintenance extends the lifespan of the cable tray system and ensures reliable operation .

Adaptation to North Korea

While specific North Korean standards are not publicly available, IEC and international cable tray standards can be applied. Contractors should consider local environmental conditions, material availability, and safety regulations when planning installations. By following these guidelines, cable tray systems in North Korea can achieve safe, efficient, and maintainable electrical infrastructure, suitable for industrial, commercial, or residential applications .