Fireproof cable tray is applicable to laying power cables below 10KV, control cables, lighting wiring and other indoor and outdoor overhead cable trenches and tunnels. Next, the cable tray manufacturer in Jinan will analyze the use basis of fire resistant cable tray.
The fireproof bridge is mainly composed of fireproof board made of glass fiber reinforced material and inorganic adhesive, fireproof board made of metal skeleton and other fireproof substrates, and the outer layer is coated with fireproof coating. The fire bridge will not burn after encountering fire, thus preventing the spread of fire. The fireproof bridge has excellent fireproof and flame retardant effects, and is also characterized by fire resistance, oil resistance, corrosion resistance, non-toxic, and convenient equipment.
The fireproof cable tray is made of steel, with double-layer fireproof cover plate and inorganic fireproof slot box inside. The uniform thickness of the insulation is 25 mm. The double-layer cover plate is used for ventilation and heat dissipation, and the interior is sprayed with fireproof paint. When the fireproof tray encounters a fire, the paint will expand, block the cooling hole, and protect the cable in the tray. The fireproof function of the inorganic fireproof tray has been tested by the National Fire Protection Testing Center for 60 minutes, and the cable quality is qualified. The support structure is good and can effectively fix the inorganic fireproof tank box.
When the cables in the fireproof tray are laid straight, they shall be fixed on the tray support at the upper end of the cable every 1.5m; When laying horizontally, it shall be fixed at the head, tail, turn and every 3~5m.
Generally speaking, a large number of cables can be pulled down with straight bending plates and straight racks, while a small number of cables can be pulled down with guide plates or conduits, and the pulling method can be indicated. The fireproof cable tray shall be more than 2.2m above the ground, the distance from the top of the cable tray to the ceiling or other obstacles shall not be less than 0.3m, the cable tray width shall not be less than 0.1m, and the filling rate of the section in the cable tray shall not exceed 50%.
When the fireproof cable tray crosses the electrical equipment, the clear distance between them shall not be less than 0.5m. When two groups of fireproof cable trays are laid at the same height in parallel, the clear distance shall not be less than 0.6m. When the large-span trench enters the building from the outside, the gradient of the bridge shall not be less than 1/100.
This is the end of the question about the basic use of fireproof cable tray. You can come to our website if you have any opinion http://www.sddlqj.cn Communicate and share. Of course, remember to maintain the cable tray.