The distinction between cables passing through bridges or pipelines should be made in strict accordance with the design instructions of the drawings. During construction, it may be because of the cables passing through bridges in this place, whether in terms of safety hazards, construction procedures, etc. For example, the cables in multi-storey and high-rise electrical hoistways are laid through bridges, because there are many cables, the bridges are exposed, and it is easy to repair in case of problems, and the cost performance is also high; Some lines that only need one cable basically go through the pipe, because the bridge, relative to the pipe, is time-saving and labor-saving for pipeless installation, and the pipe may be concealed in some places.
In addition, the installation environment of Jinan cable bridge is different and the requirements are different. Different installation environments require grounding measures to install the bridge. So, which environments need to be grounded when installing the bridge? Which environments do not require grounding to install the bridge?
1. Grounding is not required for bridge installation in common environment;
2. The explosion hazardous environment needs to be grounded. Because of the static electricity, the electrostatic discharge sparks reach the explosion critical value, which will cause danger. Therefore, it is necessary to take grounding measures when installing the bridge in this environment;
3. The surface treatment of glass fiber reinforced plastic cable tray can be galvanized or electrostatic spraying or hot galvanizing, which is convenient for grounding;
4. Both ends of the bridge shall be grounded, and the bridge connection part shall be bridged.
That's all about cable tray. If you have any doubts or needs about it, please come to our website Consult and understand, and relevant personnel will give you detailed answers!