【正文】 5 Lightning protection system construction methods and technical measures 6 Lightning protection system grounding engineering major required close coordination, interspersed with civil pleted. In civil unit beam, column and reinforced structure modeling is to follow up the grounding body ( line ) of the lap welding and grounding lead welding. In order to prevent the welding fault leakage, during each lightning protection on the ground ( body ) after welding, are on the main reinforcement is painted in eyecatching mark, for the benefit of a , mesh protection construction method According to the design institute to provide the drawings, using the foundation steel (including pile steel mesh cage bars ) as the lightning protection and grounding, using column within 2main bar as lead, using concrete foundation beam reinforced bar as electrode connection, use of roof beam reinforcing steel bar and reinforced parapet coping as dark installed lightning protection lightning protection construction method: 1straight buried metal pipes and metal top and lightning protection device. 2into the building of buried metal pipeline, roof all the metal pipeline and its structure also and lightning protection device. 3note that in the construction of grounding body ( line ) of the lap length must ply with the following provisions: to2 times its width ( and at least 3edge welding)。 use of cathodic protection. One, ground resistance test requirements: a. AC grounding, grounding resistance should be less than4 ohm。 (2) each welding head。 Current。 1 Lightning protection grounding Abstract The significance of lightning and mitigation on very little money to prevent large losses, and its function is to use scientific means avoid natural disasters. Grounding is to make the system has been included in the lightning protection lightning energy discharge into the earth, and good grounding can effectively reduce the online guide overvoltage, avoid counterattack. Avoid ground is the most important aspect of technology, whether sings rem, induction lightning, or other forms of ray, ultimately the lightning current into the earth. Therefore, no reasonable and good grounding device is can39。 potential 1 introduction In recent years, many domestic and foreign standards do not advocate information equipment using independent grounding device, remend the use of mon earthing system. For example, the 2021 edition of the GB5005794 design code for protection of structures in point out clearly: every building itself should adopt mon earthing system to be the buildings within the various grounding are unified to buildings based on, or outdoor grounding device. When the building was hit by lightning, power system voltage and electrical equipment grounding voltage rises at the same time, keep the equipment working voltage constant, so that the electronic equipment from lightning strikes can work normally. Common earthing system usually use the building foundation grounding electrode, the grounding resistance less than 1 ohm in general, if the equipment grounding resistance requirement is lower, should take the minimum value. The ground that has been incorporated into the lightning protection system of lightning energy drain into the earth, good grounding downlead to effectively reduce the voltage on the back, to avoid the occurrence of. In the past some requirements of electronic equipment grounding alone, the purpose is to prevent stray current and transient current in power work disturbance of the normal work of equipment. Before 90 time, forces of the munication navigation equipment electronic tube device, using analog munication mode, analog munication on particularly sensitive to interference, interference, so will take power and munications grounding separate way. Now, the lightning protection engineering fields do not advocate a separate ground. In the IEC standards and ITU standards are not advocating a separate ground, American Standard IEEEStd11001992more sharply pointed out: not remended the use of any kind of socalled separate, independent, 2 puter, electronic or other such incorrect ground as equipment grounding conductor of a connection point. Grounding is the most fundamental aspect of the lightning protection system. The ground is not good, all the measures of lightning protection effect can pla y. Lightning protection grounding is ground munication station Code for construction and acceptance of the basic safety requirements, the grounding of PLC belongs to a lowvoltage electrical equipment of single point grounding mode Low voltage electrical equipment of single point grounding mode can be divided into: tandem type single point grounding, parallel type single point grounding, multiple branching of single point grounding. 2 single point grounding method Tandem type single point grounding: or first grounding ways. Method : the number of low voltage electrical equipment grounding terminal equipment with the same root near the ground wire connecting, then through this grounding and grounding device. The grounding system is: save manpower, material resources。 (3) cable channel equalizing zone。 b. Safety grounding, grounding resistance should be less than4 ohm。 is connected by double lapped continuous welding of , weld length not less than 6 times the diam