All connection components used in the installations of lightning protection services have passed bs en 62305 1. Iec design standard and en component standard conflicts 91. Focus on protection of structures against lightning. Now the third revised edition of the english lightning protection guide is available.
It is the british edition of the european standard both are derived from iec 62305 to which all lightning protection systems to new structures, and new extensions to existing ones, are designed, installed and maintained. Specification for lightning protection diocese of rochester. Commission iec has published numerous standards on the topics of lightning protection. Bs 6651 and bs en 62305 bs 6651 bs en 62305 simple risk assessment structural damage comprehensive risk management calculation based on four type of risk r1r4 two levels of lightning protection ordinary and high risk four levels of lightning protection system lps iiv transient overvoltage surge protection in appendix c. This opening part of the bs eniec 62305 suite of standards serves as an. This is covered extensively in the furse guide to bs en 62305. New european standards regarding lightning and surge.
It classifies the sources and types of damage to be evaluated and introduces the risks or types of loss to be anticipated as a result of lightning. For a finite period, bs en iec 62305 and bs 6651 ran in parallel, but as of bs en iec 62305 lightning protection standardaugust 2008, bs 6651 has been withdrawn and now bs en iec 63205 is the recognized standard for lightning protection. Bs6651 was withdrawn in 2008 and is no longer current. Where lpl i or space is blank is indicated a full risk assessment to bs en 62305 2 2012 is recommended. The lightning protection system is defined by its protection class, where the effectiveness of protection class i decreases down to pro. The british standard for lightning protection is the current edition of bs en 62305 protection against lightning. Iec bs en 62305 2 provides the procedure for the evaluation of the risk of damage from a lightning related event. Iec bs en 62305 1 provides the general principles for the protection of structures, their people, contents and electrical installations, against the damaging effects of lightning. The bs en iec 62305 standard for lightning protection was originally published in september 2006, to supersede the previous standard, bs 6651. Bs eniec 62305 lightning protection general standard. British standard bs 6651 and eniec standards 89 20. Bs en 62305, protection against lightning, consists of the following parts.
This opening part of the iecbs en 62305 suite of standards serves as an introduction to. Lightning protection system lps bs en iec 62305 1 has defined four lightning protection levels lpls based on probable minimum and maximum lightning currents. The electricity at work regulations 1989 state that lightning protection systems lps should be tested in accordance with the relevant british standard which is now bs en 62305. Lightning protection to bs en 62305 20011 lightning strikes can have devastating consequences to buildings and structures that are not adequately protected against a lightning strike. Designing to the iec 62305 series of lightning protection standards. Bs eniec 62305 lightning protection standard mafiadoc. Bs en iec 62305 1 general principles this opening part of the bs en iec 62305 suite of standards serves as an introduction to the further parts of the standard. It also defined lightning protection zones often abbreviated to lpzs. Differences between national lightning protection standards and the iec 62305. Selection of the most suitable spm is made using the risk. Bs 7671 clearly points the reader back to bs en 62305.
The concept is expanded upon in iec bs en 62305 3 and iec bs en 62305 4. St d d li ht istandards lightning protection systemsprotection systems iec en 62305. Bs eniec 62305 lightning protection general standard principles. Relevant good practice is provided by the bs en 62305 series of standards, protection against lightning. The annual testing and inspection of lightning protection systems are essential for the continued safeguard of the building, the building structure itself, along with the contents and the lives of its occupants. Lightning protection system design and installation. Jul 12, 2007 bs en 62305 2 specifically deals with making a risk assessment, the results of which define the level of lightning protection system lps required. Lightning protection according to iec 62305 diogo filipe da silva santos thesis to obtain the master of science degree in.
Requirements for structures with risk of explosion, in addition to standard. The scope includes lighting components in general, and different. Bs en 62305 considers lightning protection in much greater depth. The correlation between the four levels of lpl and lps is identified in table 7.
Bs 6651 1985 british standard for lightning protection for years bs en 62305. The main standard is bs en 62305 protection against lightning, consisting of. Lightning protection to bs en 62305 20011 uk lightning. Further information will be provided on part 2 once it is released. Lighting protection level i is the most severe, with level iv being the least. Bs en physical damage to structures and life hazard. Lightning protection mastering the maze of bs en 62305. The 18th and latest edition of bs 7671 the iet wiring regulations published on the 2nd july 2018. Figure 4 highlights the lpz concept as applied to the structure and to spm.
Lightning protection design compliant to bs en 62305. Nfpa 780 standard for the installation of lightning protection systems. Bs en electrical and electronic systems within structures. Until this is published, risk assessment calculations for lightning protection should follow bs en 62305 2. Process for the management of ignition by lightning. Various regulations, codes, standards and guidance on lightning protection are applicable and these include the following. Lightning protection level lpl four protection levels i, ii, iii and iv are defined by considering the peak current, charge, specific energy, duration of various lightning strokes and the probability of these being exceeded. This is an introduction to the other parts of the standard. Applicable to risk assessment for a structure due to lightning flashes to earth. Broader focus on protection against lightning including the structure. Bs en 62305 3 outlines all aspects of internal and external lighting protection systems, including class, design and the continuity of steelwork in reinforced concrete structures. Lightning protection testing as recommended by both the current british standard, bs en 62305 and its predecessor, bs 6651. State of the art for the installation of lightning protection systems 0. Air and earth termination, as well as downconductor systems are also referenced in this standard.
A guide to bs en 62305 protection against lightning. In this article, sean passant, atlas council member and technical manager at dehn uk ltd assesses the impact of this new edition on the lightning protection and surge protection industry. The part 2 of bs en 62305 provides a comprehensive mathematical model to evaluate and manage the risk posed by lightning strikes and measures to alleviate the risk associated with earthing system designs. Protection against lightning a uk guide to the practical. Until this is published, risk assessment calculations for lightning protection should follow bs en 623052. The main body of this part of the standard gives guidance on. Lightning equipotential bonding in accordance with bs en 62305 3.
Spm were previously referred to as a lemp protection measures system lpms in iec bs en 62305. These lpls equate directly to classes of lightning protection system lps. It provides a process for analysing risk and provides information for the design, installation, inspection, maintenance and testing of lightning protection systems and surge suppression measures. The bs en 62305 updated the standards, and included the protection of electrical systems and equipment such as computers, fire alarms and pa systems. Is en623052 is the most important part of the standard. Lightning protection at onshore hazardous installations hse. The general industry accepted recommendation used to be that the system is tested at eleven month intervals in order to take account over time all. At lightning protection services we only use the highest quality materials supplied by wallis, dehn and furse. Impact of the changes in the 18th edition iet wiring. The new standard is divided into four parts, detailing requirements for lightning protection systems for the structure both externally and internally. British standards can be obtained in pdf or hard copy formats from the bsi online shop. All our lightning protection systems are designed in accordance to bs en 62305. Installations should be subject to periodic maintenance and inspection to ensure that safety measures remain effective. Bs 6651 1985 british standard for lightning protection for years.
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