One, mine definition  Room mine, and induction into lightning directly stroke mine protection.  The lightning directly stroke protection by the main building installed by the completion of the lightning rod; room Lightning (including room and power systems Lightning Weak Information System) is mainly caused by mine-induced lightning surges and other reasons have caused voltage.   
  The computer room equipment lightning damaged more than 95 percent by the induction caused by lightning, and its main channels: 
1, outdoor transmission line from lightning 
2, the lightning electromagnetic pulse radiation
3, the potential counterattack
4, industrial Overvoltage
Second, the installation of mine:
Lightning traps should be installed in all external line (telecommunications, and electric power transmission medium used metal) entered the engine room equipment ports, as the case may be adopted 1-3 Lightning. 
Third, Room grounding program <BR> grounding system is the engine room of the environment an important component of the engine room is not only a direct impact on the quality of communications equipment and communications engine room the normal operation of power systems, also played safety and personal protection equipment safety role.   
Grounding system by the grounding, grounding into line, or ground wire was grounding Tandem platoon and grounding wiring components.  The main resistance grounding system from the soil near the grounding resistance by the decision. If the soil resistivity high, unattainable grounding resistance of less than 4 ohm requirements, it must reduce the use of artificial methods of grounding resistance. 
     1, Room grounding system design objectives 
         Grounding in the way through a distributed, grounding resistance requirements are as follows: 
      (1) of grounding resistance ≤ 4 Ω 
      (2) protection of grounding resistance ≤ 4 Ω 
      (3) Mine grounding resistance ≤ 10 Ω 
    2, Integrated Ground System requirements: 
       1), computer systems directly DC grounding resistance of less than 4 Ohm 
       2), a joint computer system DC grounding resistance is less than 1 ohm 
       3), the exchange of working grounding resistance grounding system is less than 4 Ohm 
       4), computer system security protection grounding resistance and electrostatic grounding less than 2 Ohm 
       5), the Lightning Protection grounding system grounding resistance is less than 2 Ohm 
     3, the type of grounding 
        Ground work: using the earth as a conductor of the loop 
        The protection of grounding: the establishment of a unified land use reference potential or shielding from the view of the role of the circuit stability, good quality, especially the equipment and guarantee the safety of staff.   
       Repeat grounding: the zero line with the earth many times more of a metal link.   
        Static Grounding: mobile equipment or objects moving in the pipeline, due to static friction, it gathered in the pipe, containers and storage or processing equipment, a high potential, and the personal safety of the equipment and buildings are dangerous.  Made electrostatic grounding, electrostatic once appeared, in the introduction to the possible elimination of their gathering.   
DC grounding work (also known as logical grounding, signal ground): All the micro electronics and computer equipment, the majority use CMOS integrated circuits, DC work at a lower pressure, to the same computer system, the work of microelectronic circuit equipment have the same "potential" point of reference, all the equipment will be "zero" potential access points at the same grounding device, it can be stabilized circuit potential and prevent foreign interference, and this is known as the work of DC grounding.   
Lightning Grounding: To enable China to the lightning surge current land to be protected against lightning directly stroke or induction of mines inrush over-voltage, over-current hazards, all of the buildings, electrical equipment, wiring networks, and other non Charged metal parts, and metallic sheath, MOA, as well as all water, gas pipelines, etc. should be mine and metal grounding device for connecting.