⑶接地网敷设电缆沟、竖井、夹层接地母线应单独敷设。接地体为铜材质时放热

⑶Cable trenches, shafts, and mezzanine grounding busbars for grounding network laying should be laid separately. <br>When the grounding body is made of copper, exothermic welding should be used, and hot melt welding method should be used for the connection between composite grounding mesh materials. Hot dip galvanized anti-corrosion treatment should be done for all exposed steel ground wires. <br>The outdoor structure, outdoor above-ground equipment, and the ground from indoor to outdoor should be connected to the main ground network and should not be connected to the ground wire of the cable support. <br>The rail return ground wire must not be connected to the main ground grid. <br>The backfilling of the grounding grid trench should be backfilled and compacted in layers with electric tools.

⑶ Grounding network laying<br>Cable trenches, shafts, and interlayer grounding busbars should be laid separately.<br>When the grounding body is made of copper material, exothermic welding should be used, and the hot melt welding method should be used for the connection between composite grounding grid materials. Hot dip galvanized anti-corrosion treatment should be applied to all exposed steel grounding wires.<br>The outdoor architecture, outdoor aboveground equipment, and indoor grounding to the outdoor should all be connected to the main grounding network and not to the grounding wire of the cable support.<br>The rail return grounding wire shall not be connected to the main grounding grid.<br>The backfilling of the grounding network trench should be carried out in layers and compacted with electric motors.

⑶ Grounding grid laying<br> Cable trench, shaft and interlayer grounding bus shall be laid separately.<br> When the grounding body is made of copper, exothermic welding should be adopted, and hot-melt welding method should be used to connect the materials of for composite grounding network. Anti-corrosion treatment of hot dip galvanizing should be used for all exposed steel grounding wires.<br> Outdoor structure, outdoor ground equipment and indoor grounding to outdoor shall be connected to the main grounding network, and shall not be connected to the grounding wire of cable support.<br> Rail return grounding wire shall not be connected to the main grounding network.<br> Backfilling of grounding grid trench should be done by layered backfilling and tamping with electric motors.