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    NFPA 780-2008 雷电保护系统的安装标准

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    nfpa 雷电 保护 维护 系统 安装 标准
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    1、NFPA Technical Committee Document Proposal Form NOTE: All Proposals must be received by 5:00 pm EST/EDST on the published Proposal Closing Date. For further information on the standards-making proces NFPA Technical Committee Document Proposal Form NOTE: All Proposals must be received by 5:00 pm EST/。

    2、EDST on the published Proposal Closing Date. For further information on the standards-making proceSequence of Events Leading to Issuance of an NFPA Committee DocumentStep 1: Call for Proposals Proposed new Document or new edition of an existing Document is entered into one of two yearly revision Shr。

    3、ouds . 8.4.2.8, 8.4.2.9 Ordinary structures . 4.18, A.4.18.1 to A.4.18.878058 INSTALLATION OF LIGHTNING PROTECTION SYSTEMS-L- -N-78057INDEXCopyright National Fire Protection Association Provided by IHS under license with NFPANot for ResaleNo reproduction or networking permitted without license from 。

    4、IHS-,-Potential equalization . 4.20 Flat roofs . Fig. 4.1.2, 4.7.1(1), Fig. 4.7.2.3(a), 4.8.1(B), 4.8.2.4,78056 INSTALLATION OF LIGHTNING PROTECTION SYSTEIndexin thereproducedCablesConnected to aircraft . I.1.7Bonding . 8.4.5.2Connections .O.1.2 Other Publications. ANSI/IEEE C62.45, IEEE Recommended。

    5、 Practice on Surge Testing78054 INSTALLATION OF LIGHTNING PROTECTION SYSTEMSCopyright National Fire Protection Association Provided by IHS standard. The placement of air terminals on parts of the wind voltages be used. Otherwise, the SPD can conduct current dur-78053ANNEX OCopyright National Fire Pr。

    6、otection Association Provided by IHS u(1) Dwellings or other buildings that are protected against M.3.1 One should remain inside a closed boat, as far as prac-78052 INSTALLATION OF LIGHTNING PROTECTION SYSTEMSCopyright National Fire ProtAeCollective Area for a Structure Where a Prominent Part En-com。

    7、passes All Portions of the Lower Part of the Structure.Isolated structure, no other structureslocated within a distance of 3H1Isolated stFlash Density78050 INSTALLATION OF LIGHTNING PROTECTION SYSTEMSCopyright National Fire Protection Association Provided by IHS under license with NFPANot for Resale。

    8、No reproduction or networking permit19891994Avg. VermontLightningFl. Density(fl./km2/yr.)278049ANNEX LCopyright National Fire Protection Association Provided by IHS under license with NFPANot for ResaleNo reproduction or networking peTable L.1.2 Damage by Occupancy UseConsequenceinstallations;limite。

    9、dorfailure:alarmof life,electronicof feedflammables,computercultural78048 INSTALLATION OF LIGHTNING PROTECTION SYSTEMSCopyright NatioK.5.4 Magazines. K.7.3 Electrical (14-Month) Test. The lightning protection78047ANNEX LCopyright National Fire Protection Association Provided by IHS under license wit。

    10、h NFPANot for ResaleNo reproductAnnex K Protection of Structures HousingK.4 Grounding.78046 INSTALLATION OF LIGHTNING PROTECTION SYSTEMSCopyright National Fire Protection Association Provided by IHS under license with NFPANot for RH.1.2 The loss of livestock due to lightning during thunder- groundin。

    11、g receptacles to permit interconnection of metal78045ANNEX JCopyright National Fire Protection Association Provided by IHS under lF.2.5 Grounding Electrodes. Grounding electrodes for con- structural steel framework and its lower inductive reac-78044 INSTALLATION OF LIGHTNING PROTECTION SYSTEMSCopyri。

    12、ght National Fire Protection I78043ANNEX FCopyright National Fire Protection Association Provided by IHS under license with NFPANot for ResaleNo reproduction or networking permitted without license from IHSThree-point ground res(3) Continuity tests to determine if suitable equipotential (5) Inspecti。

    13、on, testing, or both of surge suppression devices78042 INSTALLATION OF LIGHTNING PROTECTION SYSTEMSCopyright National Fire ProtTable C.2.3 Sample Calculations of Bonding Distancesin.in.in.78041ANNEX DCopyright National Fire Protection Association Provided by IHS under license with NFPANot for Resale。

    14、No reproduction or networknecessary to equalize potentials by bonding grounded metal bod- higher the lightning current, the higher the magnetic field.78040 INSTALLATION OF LIGHTNING PROTECTION SYSTEMSCopyright National Fire Ptem components can be built in so as to be protected from B.4.6 Where pract。

    15、icable, each grounding electrode connec-78039ANNEX CCopyright National Fire Protection Association Provided by IHS under licThese fields are not as strong on flat surfaces as they are on edges78038 INSTALLATION OF LIGHTNING PROTECTION SYSTEMSCopyright National Fire Protection Association Provided by。

    16、 IHS under license withcan be expected. The metallic path should be continuous ment and propagation, empirical observations over hundreds78037ANNEX BCopyright National Fire Protection Association Provided by IHS under liceEquating resistances for a copper conductor of area ACu,78036 INSTALLATION OF 。

    17、LIGHTNING PROTECTION SYSTEMSCopyright National Fire Protection Association Provided by IHS under license with NFPANot foA.4.20.1 For structures 18 m (60 ft) or less in height, a loop floating roofs and seals with vapor spaces below the flexible78035ANNEX ACopyright National Fire Protection Associati。

    18、on Provided by IHS Three methods of analysis are commonly used for this de- though this is usually achieved by the LN modes across two78034 INSTALLATION OF LIGHTNING PROTECTION SYSTEMSCopyright National Fire ProtectioA.4.15.4.1 It is preferable that grounding electrodes be lo-Outside zone Inside zon。

    19、e78033ANNEX ACopyright National Fire Protection Association Provided by IHS under license with NFPANot for ResaleNo Annex A Explanatory MaterialA.3.3.6 Combination Waveform Generator. For the open-78032 INSTALLATION OF LIGHTNING PROTECTION SYSTEMSCopyright National Fire Protection Association Provid。

    20、ed by IHS under8.4.3.2 The loop conductor shall be connected to at least one 8.4.6.2* Connecting fittings made of metals other than alumi-78031PROTECTION FOR WATERCRAFTCopyright National Fire Protection Associationm (50ft).78030 INSTALLATION OF LIGHTNING PROTECTION SYSTEMSCopyright National Fire Pro。

    21、tection Association Provided by IHS under license with NFPANot for ResaleNo reproduction or networking permitted(C) Isolated metal parts shall be bonded as required by Sec- 8.2.2.4* Carbon fiber composite (CFC) is not permitted to be78029PROTECTION FOR WATERCRAFTCopyright National Fire Protection As。

    22、sociation P(B) Sideflash distance from a catenary shall be calculated as 7.4 Protection of Specific Classes of Structures.78028 INSTALLATION OF LIGHTNING PROTECTION SYSTEMSCopyright National Fire Protection Ass7.3.3.7 Overhead Ground Wire.75Rolling78027PROTECTION FOR STRUCTURES CONTAINING FLAMMABLE 。

    23、VAPORS, GASES, OR LIQUIDSCopyright National Fire Protection Association Provided by IHS under license with NF7.1.1.2 For the purpose of this chapter, the term structure 7.3 Protective Measures.head78026 INSTALLATION OF LIGHTNING PROTECTION SYSTEMSCopyright National Fire Protection Association Provid。

    24、ed by IH6.4.2 Down Conductors. 6.8.1.2 TopLevelofStack. All interior and exterior grounded78025PROTECTION FOR STRUCTURES CONTAINING FLAMMABLE VAPORS, GASES, OR LIQUIDSCopyright National Fire Protection Assocmaterial, and to the lightning protection system loop conduc- 6.2 Materials.78024 INSTALLATIO。

    25、N OF LIGHTNING PROTECTION SYSTEMSCopyright National Fire Protection Association Provided by IHS under liceh(A) If a + b is less than the calculated bonding distance, then78023PROTECTION FOR MISCELLANEOUS STRUCTURES AND SPECIAL OCCUPANCIESCopyright National Fire Protection Association Provided by IHS。

    26、 unde4.19.2 Materials. (B) Reinforced Concrete Structures Where the Reinforce-78022 INSTALLATION OF LIGHTNING PROTECTION SYSTEMSCopyright National Fire Protection Association Provided by IHS under licenseTable 4.18.4 Maximum Allowed Suppressed Voltage Ratings per Mode of Protection ProvidedBe78021PR。

    27、OTECTION FOR ORDINARY STRUCTURESCopyright National Fire Protection Association Provided by IHS under li4.15.4.2 Where rod or cable conductors are used for ground- included within this standard are limited to permanently in-78020 INSTALLATION OF LIGHTNING PROTECTION SYSTEMSCopyright National Fire Pro。

    28、te4.13.4.2 The ground ring electrode shall be a main-size light- 4.14.1.1 This interconnection shall include lightning protec-78019PROTECTION FOR ORDINARY STRUCTURESCopyright National Fire Protection A4.12.2 Fittings used for required connections to metal bodies78018 INSTALLATION OF LIGHTNING PROTEC。

    29、TION SYSTEMSCopyright National Fire Protection Association Provided by IHS under license with NFPANo4.9.8.2 Cross-run conductors shall be connected to the main 4.9.10.6 Lower roofs or projections that are located within a78017PROTECTION FOR ORDINARY STRUCTURESCopyright National Fire Protection Asso4。

    30、.9.2 Dead Ends. Strike termination devices shall be permitted78016 INSTALLATION OF LIGHTNING PROTECTION SYSTEMSCopyright National Fire Protection Association Provided by IHS under license with NFPANA78015PROTECTION FOR ORDINARY STRUCTURESCopyright National Fire Protection Association Provided by IHS。

    31、 under license with NFPANot for ResaleNo reproduction or networking permitted without license fro4.8.4.1 Strike termination devices shall be located on the in-78014 INSTALLATION OF LIGHTNING PROTECTION SYSTEMSCopyright National Fire Protection Association Provided by IHS under license with NFPANor37。

    32、 mHorizontal protected distance (m)15 m (50 ft)78013PROTECTION FOR ORDINARY STRUCTURESCopyright National Fire Protection Association Provided by IHS under license with NFPANot for ResaleNo reprod78012 INSTALLATION OF LIGHTNING PROTECTION SYSTEMSCopyright National Fire Protection Association Provided。

    33、 by IHS under license with NFPANot for ResaleNo reproduction or networking permitted without l(3) Domed roofs78011PROTECTION FOR ORDINARY STRUCTURESCopyright National Fire Protection Association Provided by IHS under license with NFPANot for ResaleNo reproduction or networking permitted witho4.5 Use。

    34、 of Aluminum. Aluminum systems shall be installed in78010 INSTALLATION OF LIGHTNING PROTECTION SYSTEMSCopyright National Fire Protection Association Provided by IHS under license with NFPANot Table 4.1.1.1(A) Minimum Class I Material RequirementsSImmmmmmg/mmm2mmmmmmmm2mm7809PROTECTION FOR ORDINARY S。

    35、TRUCTURESCopyright National Fire Protection Association Provided by IHS under license with 3.3.21.2* Class II Materials. Lightning conductors, air ter- 3.3.33 Vapor Opening. An opening through a tank shell or7808 INSTALLATION OF LIGHTNING PROTECTION SYSTEMSCopyright National Fire Protectio3.2.3 Labe。

    36、led. Equipment or materials to which has been 3.3.8 Copper-CladSteel. Steel with a coating of copper bonded7807DEFINITIONSCopyright National Fire Protection Association Provided by IHS undeNFPA 7801.2 Purpose. The purpose of this standard shall be to provide7806 INSTALLATION OF LIGHTNING PROTECTION 。

    37、SYSTEMSCopyright National Fire Protection Association Provided by IHS under license withAnnex K Protection of Structures HousingExplosive Materials . 78046Annex L Lightning Risk Assessment . 78047Annex M Guide for Personal Safety fromLightningContents5.6 Concrete Tanks and Silos . 780237804 INSTALLA。

    38、TION OF LIGHTNING PROTECTION SYSTEMSCopyright National Fire Protection Association Provided by IHS under license with NFTechnical Committee on Lightning ProtectionGerard M. BerMatthew Caie,Josephine Covino,Ignacio T. Cruz,Robert F. DaleyJoseph P. DeGrNY RTDouglas J. Franklin,Inc., MN MWilliam Goldba。

    39、ch,Mitchell GuthThe 2004 edition also contained a number of technical revisions throughout the standard. These included the7802 INSTALLATION OF LIGHTNING PROTECTION SYSTEMS2008Copyright National Fire Protection AssoCopyright 2007 National Fire Protection Association. All Rights Reserved.preparedJune。

    40、Councileditions.standardsandbinedInstitute1947the1968,designationPrbytent.clarifystreamermorenotintendedinstallaADDITIONAL NOTICES AND DISCLAIMERSUpdating of NFPA DocumentsUsers of NFPA codes, standards, recommended practices, and guides should be aware thatthese documents may be superseded at any t。

    41、ime by the iIMPORTANT NOTICES AND DISCLAIMERS CONCERNING NFPA DOCUMENTSNOTICE AND DISCLAIMER OF LIABILITY CONCERNING THE USE OF NFPA DOCUMENTSNFPA codes, standards, recommended practices, and guides, of which theNFPA780 Standard for the Installation of Lightning Protection Systems 2008 Edition NFPA, 1 Batterymarch Park, Quincy, MA 02169-7471 An International Codes and Standards Organization Copyright Nationa。

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