It doesn't mean that there will be no problems during the use of cable tray. What we need to do is to take corresponding measures to prevent problems. Now Shandong cable tray manufacturer will explain it to you.
1. Reasonable and corresponding fixing methods shall be adopted according to different structures of buildings. The arm fixed on the brick wall shall be well moisturized. It shall be used for grouting bolts on hard gray surfaces or ramming bolts or supports with dry hard fine aggregate concrete. It can be fixed only after it has strength, but the number of bolts used to fix the hanger and bracket must be the same as the number of lifting holes and bracket fixing holes, all of which should be installed and used, and should be effectively tightened
2. The operation shall be careful and the joints shall be horizontal. Breaking measures can be taken when passing through deformation joints. The disconnection distance shall be about 100mm. This method is used to solve the damage of bridge caused by settlement deformation.
3. Galvanized bridge plates are used for jump grounding. The bolts must be fastened with locking pads to ensure firm connection. The bridge must be reliably grounded. The grounding (PE) line and the bridge must be connected at not less than 2 places.
4. When ordering the reducing connector of bridge, specific technical requirements shall be proposed to the manufacturer according to the actual situation, and a full set of accessories shall be provided. Including fixing bolts, nuts, flat washers, spring washers, etc.
5. When the bridge passes through the floor or firewall, it must be blocked according to the design or this standard.
6. The safe distance between the cable tray and other pipelines shall meet the requirements of Table 12.10.3 (6).
7. During installation, the bridge cover shall be properly kept to prevent loss or damage, so as to ensure the complete installation of the cover.
8. 20-30mm expansion joint shall be reserved for every 50m (30m) of straight section of cable tray. Expansion joint plate shall be used for connection, and expansion joint shall be installed every 40m of the straight section of enclosed bus duct. In order to prevent the line from being laid for too long, the bridge will be deformed and damaged due to the stress caused by the change of temperature difference.
9. When the bridge is erected above the steam pipe, the pipe shall be shielded or protected. If there is no design requirement, thin iron plate or asbestos plate can be used to block according to the design requirements.
10. The bridge is seriously polluted and rusted. The installation shall be strengthened and the corrosion shall be treated. The same materials as the bridge anti-corrosion paint shall be used for spraying.
11. The jumper grounding wire shall meet the specification requirements or design requirements; However, the section shall not be less than 4mm2 copper core wire. Cables are arranged disorderly and crossed; Before installation, the layout diagram shall be drawn to ensure no crossing. During installation, the cables shall be placed in order to ensure that the cables are arranged in order.
12. Pay attention to check the fixing bolts between the cable tray and the support, which cannot be omitted.
The above is the relevant content of "What measures can be taken to prevent problems in the use of cable tray". If you have any questions or needs, please contact us http://www.yeeones.com ！