Pdf lightning protection guide 3rd updated edition adrian. Furse provides world leading earthing, lightning and electronic systems protection from our own designed and manufactured products through to risk assessment and systems design advice. Bs eniec 62305 lightning protection general standard principles. Although lightning protection is not a legal requirement for all buildings and structures, the requirements of the electricity at work regulations 1989 ref 7 will apply to most businesses. For buildings higher than 60m, a mesh with the same size should also cover. This system provides facility protection for the building and occupants by preventing damage to the structure caused by lightning.
Bs eniec 62305 lightning protection general standard. This bulletin clarifies installation and inspection criteria for lightning protection, community antenna distribution and communication equipment on buildings. For three decades, the lightning protection guide from dehn has been the trademark for practiceoriented technical literature in the fields of lightning and surge protection for buildings, installations and systems. In some countries, lightning protection standards do not allow for single mast types of protection. Chapter 3 design guidelines the lightning protection system for most communications system applications consists of. Lightning protection concepts, such as equipotential bonding and earthing of metallic structures, are often inherent in the design of process plant. Bs 7671 wiring regulations covers the electrical installation of buildings including the use of surge protection. Figure 34 exceptional protection against overvoltlges induced by lightning in incoming supplies to buildings with explosive or highly flammable conten. Various regulations, codes, standards and guidance on lightning protection.
Iec 63205 is the recognised worldwide standard for lightning protection system lps design, installation and. Mar 08, 2018 a proper lightning protection system design is very important to ensure increased protection of a building against lightning and its effects. Noaa recommends seeking out fully enclosed buildings with electrical wiring and plumbing. Although protection of the main incomer is certainly recommended, other services should be considered for protection against transient overvoltages surges. Lightning protection for buildings typical down conductor arrangements method 2 lightning protection for building bonding of extraneous equipment lightning protection test points provide a joint for test purposes at approximately 1m from finished floor level in an accessible location, unless otherwise detailed, on every down conductor. The high voltage currents from a lightning strike will always take the path of least resistance to ground. Where eskom and the ameu have set arrangements with nrs regulations. Lightning protection overview lightning protection institute. 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. It can serve as a useful guide to justify additional cost incurred by additioh. Lightning protection system should be in accordance with bs 6651 and iec 61024 to protect the building structure and personnel from the risk of a lightning strike. National consensus standards no requirements for lightning resistance or certification. Lpi publishes this booklet, lpi 175, based on nfpa 780, with additional explanatory material helpful to installer and inspector member personnel. Epa facilities manual, volume 3 safety, health, and.
Specialist advice from our fully qualified technical team, which focuses on earthing and lightning protection. Lpi advocates use of lpiip as the thirdparty inspection authority for system design, components and installation. Unlike most products, there is no such thing as a good, better, or best lightning protection system. Home lightning protection lightning protection standards. Noaa recommends seeking out fully enclosed buildings. It will be of interest and practical help to all dutyholders, particularly engineers including those involved in the design, construction, operation or maintenance of electrical systems, technicians and their managers. Bs en 62305 comprises four parts and these detail the fundamental requirements for lightning protection systems for the external and internal parts of a structure.
Ufc 357501 provides policy and guidance for design criteria and standards regarding static electricity protection, lightning protection systems and related. For example, a lightning strike up to 1km from a building can transfer huge voltages onto overhead or underground cables like data or telephone lines through inductive or resistive. Lightning protection is often a challenge for the building designer when it comes to aesthetics of the building. Electrical and electronic systems within buildings. Lightning protection system design and installation. For a finite period, bs eniec 62305 and bs 6651 ran in parallel, but as of august 2008, bs 6651 has been withdrawn and now bs eniec 63205 is the. Sep 19, 2016 lightning protection systems have a remarkable record of protecting against physical danger to people, structural damage to buildings, and failure of internal systems and equipment. Lightning protection and the building envelope construction. Protection against lightning a uk guide to the practical. Lightning protection can be implemented with minimal impact to the building. Rc35 protection of buildings against lightning strike.
The management of the process for determining the need and delivering an lps to a structure andor an lpms to protect electrical or electronic systems within a structure. The lightning protection industry began in the united states when benjamin franklin postulated that lightning was electricity, and a metal rod could be used to carry the lightning away from a building. The lightning protection institute lpi adopts the latest edition of the nfpa 780 standard as its reference document for system design. Does anyone know if lightning protection is fitted to a building it is mandatory to have this tested on an annual basis. It is the british edition of the european standard to which all lightning protection systems to new structures, and new extensions to existing ones, are now designed, installed and maintained. A discharge of static electricity between clouds and earth, lightning can send 300 million volts and 30,000 amps through the atmosphereor whatever objects lie in its path. Know your earthing and lightning protection best practice.
By 1910 up to 30% of churches had lightning protection installed. The recommendations specifically cover the following applications. Bs eniec 623051 general principles this opening part of the bs eniec 62305 suite of standards serves as an introduction to the further parts of the standard. The management of the process for determining the need and delivering an lps to a structure.
It is estimated that today 80% of churches and places of worship have a lightning protection. In the united kingdom, zurich are prepared to consider all proposals for lightning protection systems which comply with both bs en 62305 for systems and the associated bs en. Janakiraman, senior manager product development, obo bettermann india pvt ltd explains the design guidelines. Nfpa 780 provides lightning protection system installation requirements to safeguard people and property from fire risk and related hazards associated with lightning exposure. Nfpa 780 includes lightning protection for typical building construction in chapter four as requirements for ordinary structures. The likelihood of a major accident being initiated by a lightning strike at a well designed and maintained hazardous installation is, therefore, low so inspectors must act proportionately to focus. 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. As the build up and separation continues until the voltage difference between the cloud and the ground exceeds the air insulation strength, it resulted in a lightning discharge. The book had to be revised and enlarged due to changes in standardisation and technical progress. Nfpa 780, standard for the installation of lightning protection systems nfpa 1962, standard for the care, use, and service testing of fire hose including couplings and nozzles international building code ashrae manual, design of smoke control systems for buildings ashraes handbook of hvac systems and equipment. Standard for the installation of lightning protection systems. Design guidelines for proper lightning protection system.
Installation standards the installation of a lightning protection system using rods and meshed. A direct strike to a building or structure will seek a path to ground either via the structures lightning protection. The value received begins with proper design, continues through quality installation practices, and must include inspection and certification. During thunderstorms too, high volume of energy is instantaneously released which is more common in nature. At what height does a building have to have lightning. Review of furniture regulations membership member homepage. A lightning protection system provides a conductive path between an air terminal and earth, so that when a building is struck by lightning, the majority of the lightning s current follows the path of the lightning protection. State of the art for the installation of lightning protection systems 0.
Lightning protection systems complying with cancsab72m87, installation code for lightning protection systems and standards from the national fire protection association nfpa, ul, and the lightning protection institute lpi are highly effective. There are some applications where it becomes difficult to use the standard in its entirety. Why, when, what and where lightning protection is required model codes, standards, listings and instructions october 2018. Lightning is the direct cause of over 50 deaths and 400. St d d li ht istandards lightning protection systemsprotection systems iec en 62305. Identify power, telecom, data and instrumentation line entries to relevant. Ul marking and application guides are updated as necessary due to new product development. It is estimated that today 80% of churches and places of worship have a lightning protection system, and it is thought 90% of these are toweronly systems. Pdf lightning protection guide 3rd updated edition. Ul 96a lightning protection systems standards for installation. Physical damage to structures and life hazard software for design and calculation of lightning protection systems when designing lightning protection. Today, lightning protection systems are in use on thousands of buildings, homes, factories, towers, and even the space shuttles launch pad.
Steel towers also exhibit a high immunity to structural damage. Lightning protection system design certification i certify that the design of the abovementioned lightning protection system complies with the requirements of the building control regulations 2003, ss. Lightning protection using rods and meshed conductors is intended to share and dissipate the lightning. Lightning can also cause damage by a terminated strike near a building or its services. Review of industry standards for lightning protection the standards in the united states for lightning protection systems are the national electrical code nec, the national fire protection association 78, lightning protection code nfpa 78, and underwriters laboratories 96a, standard for installation requirements for lightning protection. Ul 96 lightning protection systems standards for components 4. Current changes in the sector increases the number of players in the market needing lightning protection and therefore the need for additional support regarding the appropriate standards to apply. You simply cannot cut corners to save cost and remain protected.
The need for lightning protection should be established from a risk assessment and the application of the bs en 62305 protection against lightning. Lightning protection standard the bs eniec 62305 standard for lightning protection was originally published in september 2006, to supercede the previous standard, bs 6651. A lightning protection system using an early streamer emission air terminal s shall be designed with provisions for inspection and maintenance. Jul 28, 2015 there is also growing recognition that lightning protection contributes to the sustainability and resilience of buildings and communities. Design guidelines for proper lightning protection system as. Fundamentals of lightning protection systems page 1 of 14 fundamentals of lightning protection systems, edition 1c september 2011. Steel frame buildings with metal outer coverings offer the greatest inherent protection against lightning damage. Download rc35 protection of buildings against lightning strike. The 18th and latest edition of bs 7671 the iet wiring regulations published on the 2nd july 2018. Lightning protection system designing buildings wiki. Summary a this section specifies the lightning protection and grounding system for the building s or structures. Ufc 357501 lightning and static electricity protection systems.
This paper discusses the design of a lightning protection system lps as per the prescribed rules. New european standards regarding lightning and surge. Routing of down conductors through outer wall generally spoil the aesthetics of the building. Physical damage to structures and life hazard part 4. A complete lightning protection system shall be provided for the entire building and garage. Bs en risk assessment questionnaire download as pdf file. Additional protection for these type buildings will probably be required only for very critical facilities in highly exposed locations. Employers and supervisors should know and tell workers which buildings to go to after hearing thunder or seeing lightning. New european standards regarding lightning and surge protection lightning strikes the earth 100 times a second discharges in excess of 200,000 amps. Standard for the installation of lightning protection systems2014 standards 20. May 18, 2016 a lightning protection system provides a conductive path between an air terminal and earth, so that when a building is struck by lightning, the majority of the lightnings current follows the path of the lightning protection system, with substantially less current traveling through flammable materials. Building is 15 years old, not in a particularly vulnerable area of south yorkshire, and in good order all round.
A practical guide to lightning protection and australia and nz. Code of practice for protection of structures against lightning. Impact of the changes in the 18th edition iet wiring. Section 6 describes methods of lightning protection of various items not covered in earlier sections, such as communications antennas, chimneys, boats, fences, and trees. A lightning protection system lps can protect a structure from damage caused by. Process for the management of ignition by lightning. Direct lightning strikes all world standards relating to lightning protection cover the topic of structural lightning protection extensively. Trees, power lines, buildings without lightning protection systems and even people can emit upward streamers and can, consequently, be. New european standards regarding lightning and surge protection joe ellwood. Lightning protection at onshore hazardous installations hse. Lightning protection systems are the modern development of the innovation pioneered by benjamin franklin.
Lightning protection system germany regulations legal regulations the purpose of a lightning protection system is to protect buildings from direct lightning strikes and possible fire, or from the consequences of the loadindependent active lightning current nonigniting flash of lightning. Lightning protection requirements for dod ammunition and. Bud vansickle, executive director of the lightning protection institute in maryville, missouri, says you either have a full lightning protection system or none at all. Class of lps lightning protection level lps efficiency i i 0,98 ii ii 0,95 iii iii 0,90 iv iv 0,80 table 2. The installation shall comprise air networks connected to roof and down conductors and finally terminated in earth electrodes, via structural rebars and suitable test points in accordance with the details included on the attached.
Now the third revised edition of the english lightning protection guide is available. A lightning protection system is a complete system of intercepting devices, conductors, ground. Iec 62305 protection against lightning 20 nfpa 780. This standard covers a wide range of structures that are used in commercial and industrial applications.
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