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In construction sites, especially in the construction of high-rise buildings, construction workers often suffer from physical damage due to lightning strikes. Therefore, we need to install lightning rods on buildings when deploying safety management work. As part of the key project. At the same time, we must also do a good job of grounding work. Only in this way can we ensure that when lightning strikes, huge energy has enough time and space to discharge and prevent construction workers from encountering lightning strikes at the construction site. All electrical equipment metal enclosures on the construction site must be connected with a dedicated grounding wire. The power system at the construction site is forbidden to use earth as ground or neutral wire. The grounding wire is led by the zero line of the box transformer. No switch or fuse must be installed. Lightning grounded electrical equipment must be repetitively grounded at the same time to ensure that the grounding resistance value meets the requirements. The cross-sectional area of ​​the protection neutral wire connected to the electrical equipment is an insulated stranded copper core wire of not less than 2.5 mm2. The repeated grounding resistance of the box-type transformer shall not be greater than 4Ω. The metal operating platform of the elevator derrick-mounted escalator in the construction site and the rigs, scaffolds, etc. that need to be equipped with lightning protection devices shall be used in Nanning to prevent lightning. In addition to doing a good job of grounding, lightning protection grounding must also be provided in accordance with the regulations. In the construction site, tower cranes, outdoor lifts, derricks, gantry frames and other mechanical equipment shall be installed outside the protection scope of adjacent buildings and structures. Lightning device.
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