French standard NFC17-102 September2011 Classification index:C 17-102 ICS : 91.120.40 Protectionagainstlightning Earlystreameremissionlightningprotection systems F :Protection contre la foudre - Systemes de protection contre la foudre a dispositif d'amorcage D : Blitzschutz - Blitzableitersysteme mit Startvorrichtung OfficiallyapprovedFrenchstandard On the decision of the Managing Director of AFNOR le 17th August 2011 with effect from 17th September 2011. Intended to replace officially approved standard NF C 17-102 of july 1995 which remains in effect until September 2012. Correspondence There is no equivalent IEC or CENELEC document. Analysis This document describes the main dispositions in order to insure the impact by early streamer emission protection system. Many tests on ESE are detailed and specific installation rules are introduced toensure protection efficiency. Descriptors Structures building. open areas lightning protection protection device air terminal installation design down conductor earthing， equipotential bonding verification periodic inspection maintenance. Modifications Previous edition of the standard has been upgraded to introduce more tests and also include new requirements both for product selection and installation rules. Corrections g-: : u gsnn : we 19 C282 1 (0) C : d 00 290 6 (0) : 19 xep ) UTE 1° printing 2012-08 Reproduction pronibited
UTE NF C 17-102 UTEhastakenallreasonablemeasures to ensure the accuracy of this translation but regrets that no responsibility can be accepted for any error omissionorinaccuracy. In casesofdoubt or dispute the original language text only is valid.
UTE NF C 17-102 FOREWORD There is no international standard or specific European standard about early streamer emission lightningprotection systems This document is intended to replace the 1995 edition of the NF C 17-102 with its second printing in 2009. This document specifies requirements for design in the present state of knowledge and systems and provides guidance on how to achieve this protection. structures people or objects;however the application of this document must reduce significantly the risk of damage due to lightning on protected structures. The provisions stated in this document are minimum requirements to ensure statistically an effective protection. This new edition is a pleterevision of the standard following the publication of the European protectionof structuresagainst lightning However the EN62305seriesisnot dealing with early streamer emission technology.the revision of the NF C 17-102 appeared essential to provide the design requirements of an early In order to have no conflict with the European standard series this document makes no reference to it but repeats the necessary arrangements for the design and creation of the lightningprotection system. The UTE has established the following dates: -Date onwhich the previous nationalstandardwillbe canceled:September 2012: -Date ofcessation of presumption of conformity ofproducts manufacturedunder the superseded standard: September 2012. This document was approved June 28 2011 by the Commission UF81， Protection against lightning.
UTE NF C 17-102 CONTENTS Scope. 6° 2 Normative and regulation references .. 3 Definitions .11 4 Lightning protection system with Early Streamer Emission Air Terminal. .16 4.1 Need of protection. .16 4.2 Components of the lightning protection system.. 16 5 Early streamer emission lightning protection system. .18 5.1 Design. 18 5.2 Early Streamer Emission Terminal. 18 5.2.1 General principles 18 5.2.2 ESEAT efficiency - .18 5.2.3 Positioning of the ESEAT .18 5.2.4 Materials and dimensions... 21 5.2.5 Installation. .21 5.3 Down-conductors. 22 5.3.1 General principles. 22 5.3.2 Number of down-conductors. 22 5.3.3 Routing. .23 5.3.4 Indoor routing. 24 5.3.5 Outside cladding 24 5.3.6 Materials and dimensions.... .24 5.3.7 Test joint. .25 5.3.8 Lightning event counter. 25 5.3.9 Natural ponents. 25 5.4 Equipotential bonding of metal parts. 26 5.4.1 General. 26 5.5 Lightning equipotential bonding . 26 5.5.1 General. 26 5.5.2 Lightning equipotential bonding for metal installations. 26 5.5.3 Lightning equipotential bonding for external conductive parts . 27 5.5.4 Lightning equipotential bonding for internal systems... .27 5.5.5 Lightning equipotential bonding for lines connected to the structure to be protected .28 5.6 Electrical insulation of the external ESESystem . 28 6 Earth termination systems. .30 6.1 General. .30 6.2 Earth termination system types .31 6.3 Additional measures 33 6.4 Earthing equipotentiality. .33 6.5 Proximity requirements .34 6.6 Materials and dimensions. .34 7 Special measures .34 7.1 Aerials. .34 7.2 Inflamable and explosive material storage areas. .34 7.3 Religious buildings. .34 8 Execution file verification and maintenance .35
UTE 5 NF C 17-102 8.1 Execution File. .35 8.2 Orders of Verifications. .36 8.3 Verification report .36 8.4 Initial verification... .36 8.5 Visual verification. .37 8.6 Complete verification .37 8.7 Maintenance .37 ANNEXE A (normative) RISK ANALYSIS .38 A.1 Explanation of terms .38 A.1.1 Damage and loss .38 A.1.2 Risk and risk ponents. .39 A.1.3 Composition of risk ponents related to a structure. 41 A.2 Risk management. .42 A.2.1 Basic procedure. .42 A.2.2 Structure to be considered for risk assessment. .42 A.2.3 Tolerable risk R .42 A.2.4 Specific procedure to evaluate the need of protection .42 A.2.5 Procedure to evaluate the cost effectiveness of protection . ..43 A.2.6 Selection of protection measures. .43 A.3 Assessment of risk ponents for a structure. .45 A.3.1 Basic equation. .45 A.3.2 Assessment of risk ponents due to flashes to the structure (S1). ...45 A.3.3 Assessment of the risk ponent due to flashes near the structure (S2). .45 A.3.4 Assessment of risk ponents due to flashes to a line connected to the structure (S3) .46 A.3.5 Assessment of risk ponent due to flashes near a line connected to the structure (S4).. .46 A.3.6 Summary of risk ponents in a structure. .47 A.3.7 Partitioning of a structure in zones Zs . .47 A.3.8 Assessment of risk ponents in a structure with zones Zs .48 A.4 Assessment of annual number N of dangerous events ..49 A.4.1 General.... ...49 A.4.2 Assessment of the average annual number of dangerous events due to flashes to a structure Np and to a structure connected at *a” end of a line Nps. A.4.3 Assessment of the average annual number of dangerous events due to flashes near a structure Nu ..54 A.4.4 Assessment of the average annual number of dangerous events due to flashes to a service N ...54 A.4.5 Assessment of average annual number of dangerous events due to flashes near a service N .55 A.5 Assessment of probability Px of damage for a structure .56 A.5.1 Probability P that a flash to a structure will cause injury to living beings..... .56 A.5.2 Probability Pe that a flash to a structure will cause physical damage .57 A.5.3 Probability Pe that a flash to a structure will cause failure of internal systems... .57 A.5.4 Probability Mp that a flash near a structure will cause failure of internal systems...58 A.5.5 Probability Pu that a flash to a service will cause injury to living beings ...59 A.5.6 Probability Pv that a flash to a service will cause physical damage. .60 A.5.7 Probability Pw that a flash to a service will cause failure of internal systems . ..60 A.5.8 Probability Pz that a lightning flash near an ining service will cause failure of internal systems . 60
NF C 17-102 Protection against lightning.pdf
