围棋少年第二部 www.rqmd.net 2017/06/22 浏览次数：
Xiao Bian for everyone to introduce cable support in the replacement of things to pay attention to:
Produce cable support power failure serious consequences because of many raw materials and products of petrochemical enterprises, mostly for toxic and flammable and explosive gas and liquid, once the power supply failure, there may be material leakage, equipment damage, or even serious casualties, cable with a metal stent, a current flowing through the cable process will produce magnetic field. The magnetic field leads to a closed loop is formed between the angle steel two cable bracket (Huan Liu), the cable temperature increases, the current loss increase, and further increase the Huan Liu temperature. Especially when a cable passes through a high current, the temperature rises rapidly, and a strong arc is often formed to damage the metal support.
When laying a cable bracket, the level of the ladder or the tray with holes shall not be less than 2 of the height of the ground. 5m, line and hole trays shall be no less than 2 of the height from the ground. 2m. For vertical laying of the cable support, be 1 away from the ground. 8m below the part of the metal cover to protect, the cable stent can use expansion bolts, or embedded in the iron pieces on the way to fix welding. When the cable tray is wearing a wall or floor, take corresponding measures to light fire. When the linear section steel cable tray exceeds 30m, the aluminum alloy or the glass fiber reinforced plastic cable support is more than 15m, should have the expansion joint, and its connection should use the expansion connecting plate.