耐火電纜橋架的辨別方法

   耐火電纜橋架是指在橋架選材，結構設計，安裝方面更加注重防火，使之達到耐火電纜的作用。
   一、為了防止損壞、破壞電纜絕緣層，要求橋架草盒內無明顯的凹凸，毛刺，空洞，生銹等
   二、為保證整個電纜橋架的耐火性，焊接電纜橋架表面要確保光滑。
   三、電纜橋架的以及槽盒及支架如果有涂防火材料，要確保不要有剝落。
   四、電纜橋架鋼結構防火材料必須滿足GB14907-1994的要求。

   五、電纜橋架盒如果采用鋼板制作，其最小厚度呀滿足CECS31;91<鋼制電纜橋架工程設計規范>的要求。
   六、電纜橋架如果采用非金屬材料，其燃燒性能要求大于B級。
   七、電纜橋架根據其確保電纜持續工作時間分為半個小時，四十五分鐘，一個小時已基本滿足市場需求。
   八、電纜橋架耐火檢測一種是通過溫度控制法，即通過檢測橋架內溫度實現。另外一種是把電纜放電纜橋架中，然后通電，檢驗在燃燒 環境下的工作情況。

The fire resistant cable tray means that the fire protection should be paid more attention to in the material selection, structural design and installation of the bridge, so as to achieve the role of the fire resistant cable.
one. In order to prevent damage or damage to cable insulation, there is no obvious bump, burr, cavity, rust and so on.
Two, in order to ensure the fire resistance of the whole cable bridge, the surface of welded cable bridge must be smooth.
Three, if there are fire proofing materials for cable tray and box and bracket, make sure that there is no spalling.
Four, cable bridge steel structure fireproofing materials must meet the requirements of GB14907-1994.
Five, if the cable tray box is made of steel plate, its minimum thickness will meet the requirements of CECS31, 91< steel cable tray engineering design specification.
Six, if the cable tray is made of non-metallic materials, its combustion performance is greater than B level.
Seven, the cable bridge is divided into half an hour, forty-five minutes, and one hour, which basically meets the market demand.
Eight, the cable bridge fire detection is through temperature control, that is, by detecting the temperature inside the bridge. The other is to put cables in the cable tray, then electrify, and check the combustion.
Working conditions in the environment.