Today, let's delve into what a fire-resistant cable bridge is and gain a deeper understanding of the issues to be aware of during its installation. The fire-resistant cable bridge is constructed with a steel shell, double fire-resistant covers, and inorganic fire-resistant槽 boxes. The insulation layer has an average thickness of 25mm, with double covers for ventilation and heat dissipation, and internal fire-resistant coating. When the fire-resistant cable bridge catches fire, the coating expands to block the heat dissipation holes, protecting the cables inside the box. The inorganic fire-resistant槽 box maintains its fire-resistant properties for 60 minutes, with no damage to the cables. The bracket structure is excellent, effectively securing the inorganic fire-resistant槽 boxes.

To get an initial understanding of fire-resistant cable trays, let's first take a look at their installation:

(1) When installing fire-resistant cable trays indoors, first review the design drawings, then survey the installation locations of electrical equipment and the fire-resistant cable tray.

(2) When laying fire-resistant cable bridges, the horizontal installation height of ladder racks or perforated bridges from the ground should not be less than 2.5 meters; the height of solid slots or trays from the ground should not be less than 2.2 million.

(3) Cables of different voltages and purposes, such as cables above 1 kV and below 1 kV, as well as low-voltage and high-voltage cables, control cables, emergency lighting cables, etc., and two-way power cables supplying a class of load should not be installed in the same fire-resistant cable bridge unless conditions permit. When placed on the same level, they are separated by a silver separator.

(4) When installing fire-resistant cable bridge supports, expansion bolts or welded pre-bolted iron pieces can be used for fixation. Appropriate fire isolation measures should be taken when the cable bridge passes through walls or floors. For steel cable bridges over 30 meters and aluminum alloy or glass fiber reinforced plastic cable bridges over 15 meters, expansion joints should be installed and connected with expansion connection plates.

Then, installation precautions:

Sealing cable penetration holes in walls with fire-resistant materials is a fire prevention design approach used by cable tray manufacturers. It's also a simple and effective method, and it can prevent wall air leakage.

2. One fire-resistant design method is to isolate cables of different types. Different types of cables have varying widths and rated voltages, which can inevitably lead to fires due to issues like overheating during use. Therefore, cables of different types should be laid separately, with the layers from top to bottom being high-voltage cables, power cables, and control cables.

Yunnan Ziyang Zongjiu Industrial & Trading Co., Ltd. is a cable tray manufacturer in Yunnan, specializing in tray fabrication for years. We offer standard specifications at factory prices, including galvanized, fire-resistant, and installation-ready options. If you're in need of cable trays, please feel free to call for detailed discussions!!