Proper installation of wire mesh cable trays directly impacts the safety and service life of the cabling system and is crucial for ensuring safety in complex environments.
Before installation, verify materials-checking specifications, accessory completeness, and surface quality-and conduct a site survey to mark the installation path, avoid obstacles, and assess load-bearing capacity; also, prepare necessary tools such as tape measures, spirit levels, and wrenches.
When installing supports, the vertical alignment error must be ≤3mm per meter; the spacing between supports on straight sections should be ≤1.5 meters, while spacing at turns must be reduced to within 0.8 meters. Expansion bolts must be installed vertically to a depth of ≥5cm and meet welding standards; anti-sway supports are required for vertical cable tray sections, spaced every 2 meters.
For cable tray splicing, horizontal sections should be joined using connecting plates with fasteners tightened diagonally (maintaining a gap of ≤1mm), while vertical sections require a "top-support and bottom-pull" connection method. Grounding requires a 4mm² copper conductor as a bonding jumper, with a grounding resistance of ≤4Ω.
Regarding environmental considerations, outdoor installations require rain hoods and drainage holes, and anti-rust paint may be applied in humid areas. The maximum load for wire mesh cable trays should be ≤150kg/m²; safety harnesses are mandatory for work at heights, and eye protection must be worn during cutting operations.
Standard installation steps include marking the layout, drilling holes, installing supports, assembling the cable trays, and finally installing and inspecting the system.
Safety requirements dictate that personnel wear protective gear and use tools correctly; the installation area must be well-ventilated, excessive cable stretching or bending must be avoided, and post-installation testing and inspection are required.
