UL 96A-2016 UL Standard for Safety Installation Requirements for Lightning Protection Systems (Thirteenth Edition Reprint with revisions through and including July 9 2018).pdf

1、UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL UL 96A Installation Requirements for Lightning Protection Systems STANDARD FOR SAFETYUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM ULUL

2、 COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL UL Standard for Safety for Installation Requirements for Lightning Protection Systems, UL 96A Thirteenth Edition, Dated March 18, 2016 Summary of Topics The Thirteenth Edition of the Standard for

3、 Installation Requirements for Lightning Protection Systems, UL 96A, has been issued to incorporate the proposal dated October 2, 2015. This proposal includes the following: Deletion of paragraph 9.2.3 and addition of exception to paragraph 9.1.3. The revised requirements are substantially in accord

4、ance with Proposal(s) on this subject dated October 2, 2015. All rights reserved. No part of this publication may be reproduced, stored in a retrieval system, or transmitted in any form by any means, electronic, mechanical photocopying, recording, or otherwise without prior permission of UL. UL prov

5、ides this Standard as is without warranty of any kind, either expressed or implied, including but not limited to, the implied warranties of merchantability or tness for any purpose. In no event will UL be liable for any special, incidental, consequential, indirect or similar damages, including loss

6、of prots, lost savings, loss of data, or any other damages arising out of the use of or the inability to use this Standard, even if UL or an authorized UL representative has been advised of the possibility of such damage. In no event shall ULs liability for any damage ever exceed the price paid for

7、this Standard, regardless of the form of the claim. Users of the electronic versions of ULs Standards for Safety agree to defend, indemnify, and hold UL harmless from and against any loss, expense, liability, damage, claim, or judgment (including reasonable attorneys fees) resulting from any error o

8、r deviation introduced while purchaser is storing an electronic Standard on the purchasers computer system. MARCH 18, 2016 UL 96A tr1UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL MARCH 18, 2016 UL 96A tr2 No Text on This PageUL COPYRIGHTED

9、 MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL MARCH 18, 2016 1 UL 96A Standard for Installation Requirements for Lightning Protection Systems Prior to the sixth edition, previous numbered and unnumbered editions covering Installation Requirements for Li

10、ghtning Protection Systems have been published since 1916. The sixth edition was titled Installation Requirements for Master Labeled Lightning Protection Systems. Sixth Edition March, 1958 Seventh Edition April, 1960 Eighth Edition June, 1963 Ninth Edition April, 1982 Tenth Edition May, 1994 Elevent

11、h Edition July, 2001 Twelfth Edition May, 2007 Thirteenth Edition March 18, 2016 This UL Standard for Safety consists of the Thirteenth Edition. Comments or proposals for revisions on any part of the Standard may be submitted to UL at any time. Proposals should be submitted via a Proposal Request in

12、 ULs On-Line Collaborative Standards Development System (CSDS) at http:/. ULs Standards for Safety are copyrighted by UL. Neither a printed nor electronic copy of a Standard should be altered in any way. All of ULs Standards and all copyrights, ownerships, and rights regarding those Standards shall

13、remain the sole and exclusive property of UL. COPYRIGHT 2016 UNDERWRITERS LABORATORIES INC.UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL MARCH 18, 2016 INSTALLATION REQUIREMENTS FOR LIGHTNING PROTECTION SYSTEMS - UL 96A 2 No Text on This P

14、ageUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL CONTENTS INTRODUCTION 1 Scope .5 2 Components 6 3 Units of Measurement .6 4 Undated References 6 5 Glossary .6 PROTECTION FOR ORDINARY BUILDINGS 6 General .11 7 Materials 12 8 Strike Termina

15、tion Devices 13 8.1 General 13 8.2 Zone of protection .14 8.3 Dormers 15 8.4 Intermediate ridges 15 8.5 Irregular roof lines .16 8.6 Open areas .16 8.7 Domed or curved roofs .16 8.8 Chimneys, vents and roof top metal bodies .16 9 Conductors 27 9.1 General 27 9.2 Roof conductors .31 9.3 Down conducto

16、rs 32 9.4 Interconnecting conductors .34 10 Grounding .34 10.1 General .34 10.2 Multiple ground rods 37 10.3 Shallow topsoil .39 10.4 Common grounds 40 10.5 Concrete-encased electrodes 40 10.6 Ground ring electrode .41 11 Metal Bodies Subject to Direct Strikes .41 12 Connectors and Fittings .45 13 S

17、urge Protection 46 14 Concealed Installations .46 15 Structural Steel Framing .47 PROTECTION FOR MISCELLANEOUS STRUCTURES 16 General 49 PROTECTION FOR HEAVY-DUTY STACKS 17 Mechanical Execution of Work .49 18 Components .50 19 Corrosion Protection 50 20 Air Terminals 50 21 Conductors 52 MARCH 18, 201

18、6 INSTALLATION REQUIREMENTS FOR LIGHTNING PROTECTION SYSTEMS - UL 96A 3UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL 22 Fasteners 52 23 Bonding .53 24 Splices 53 25 Metal Stacks 53 26 Metal Guy Wires and Cables 54 SUPPLEMENT SA - MATERIAL

19、REQUIREMENTS MARCH 18, 2016 INSTALLATION REQUIREMENTS FOR LIGHTNING PROTECTION SYSTEMS - UL 96A 4UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL INTRODUCTION 1 Scope 1.1 These requirements cover the installation of lightning protection syste

20、ms on all types of structures other than structures used for the production, handling, or storage of ammunition, explosives, ammable liquids or gases, and other explosive ingredients including dust. 1.2 These requirements apply to lightning protection systems that are complete and cover all parts of

21、 a structure. Partial systems are not covered by this standard. 1.3 These requirements shall not apply to adjacent structures. 1.4 Adjacent structures shall be considered separate structures. 1.5 Adjacent structures with lightning protection shall be considered part of the structure if the adjacent

22、structures lightning protection system complies with this standard and is connected to the lightning protection system of the structure in accordance with Section 10.4. 1.6 Walkways that are attached to a structure shall be considered part of that structure. 1.7 Free standing Walkways shall be consi

23、dered an adjacent structure under the following conditions: a) It is separated by a re wall and conductive media that is shared by both facilities has an SPD in accordance with Section 13. b) It is isolated by a distance of not less than six feet and conductive media that is shared by both facilitie

24、s has an SPD in accordance with Section 13. 1.8 This standard does not cover lightning protection for: a) Electric transmission lines or open air distribution racks, b) Outdoor substations or switch yards, and c) Electric generators unenclosed by a building other enclosed structure. 1.9 Enclosed gen

25、erators and conventional building structures at or associated with generators or power plants, etc. are covered. 1.10 These requirements do not cover lightning protection components, which are covered by the Standard for Lightning Protection Components, UL 96. MARCH 18, 2016 INSTALLATION REQUIREMENT

26、S FOR LIGHTNING PROTECTION SYSTEMS - UL 96A 5UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL 2 Components 2.1 Except as indicated in 2.2, a component of a product covered by this standard shall comply with the requirements for that component

27、. 2.2 A component is not required to comply with a specic requirement that: a) Involves a feature or characteristic not required in the application of the component in the product covered by this standard, or b) Is superseded by a requirement in this standard. 2.3 A component shall be used in accord

28、ance with its rating established for the intended conditions of use. 2.4 Specic components are incomplete in construction features or restricted in performance capabilities. Such components are intended for use only under limited conditions, such as certain temperatures not exceeding specied limits,

29、 and shall be used only under those specic conditions. 2.5 Components utilized in the installation of a lightning protection system covered by this standard shall comply with the Standard for Lightning Protection Components, UL 96 or other applicable UL Standards. Exception: Screws, bolts, nuts, was

30、hers and nails. 3 Units of Measurement 3.1 Values stated without parentheses are the requirement. Values in parentheses are explanatory or approximate information. 4 Undated References 4.1 Any undated reference to a code or standard appearing in the requirements of this standard shall be interpreted

31、 as referring to the latest edition of that code or standard. 5 Glossary 5.1 For the purpose of this standard, the following denitions apply. 5.2 ADJACENT STRUCTURE A structure that is physically separated by a re wall or greater than six feet of distance separating it from a structure with lightnin

32、g protection. 5.3 AIR TERMINAL A type of strike termination device intentionally installed for the purpose of intercepting lightning ashes. These items are sometimes referred to as lightning rods. 5.4 BONDING (POTENTIAL EQUALIZATION) An electrical connection between an electrically conductive object

33、 and a component of a lightning protection system with a secondary or main-size conductor intended to signicantly reduce potential differences created by lightning currents in the main lightning conductors and other grounded metal objects. MARCH 18, 2016 INSTALLATION REQUIREMENTS FOR LIGHTNING PROTE

34、CTION SYSTEMS - UL 96A 6UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL 5.5 BUILDINGS: a) Ordinary Building A building of common or conventional construction used for ordinary purposes, whether commercial, farm, industrial, institutional, or

35、 residential. b) Class I Ordinary Building A building that is not more than 75 feet (22.9 m) high. c) Class II Ordinary Building A building that is more than 75 feet (22.9 m) high or greater. d) Metal-Clad Building A building with either sides or roof made of or covered with sheet metal. e) Metal-Fr

36、amed Building A building with electrically continuous framing of sufficient size and conductivity to be used as part of the lightning protection system. 5.6 CHIMNEY A smoke or vent stack not meeting the requirements of a heavy-duty stack. 5.7 CONDUCTOR The portion of a lightning protection system in

37、tended to transfer lightning discharge currents between strike termination devices and ground or to provide potential equalization between conductive bodies in/on the structure. a) Main Conductor A conductor intended to conduct primary lightning currents that interconnects strike termination devices

38、 with grounding electrodes. b) Secondary Conductor A conductor that connects metal bodies within the zone of protection to the lightning protection system to eliminate electrical potential that may create arcing. 5.8 EARTH Finished grade level around a structure. 5.9 ELECTRICALLY CONTINUOUS An unint

39、errupted electrically conductive path or one made electrically continuous by being bonded together by welding, brazing, compression tting or suitable bonding plate. 5.10 FASTENER An attachment to secure a conductor to a structure. 5.11 GALVALUME An aluminum coated sheet steel product. It is comprise

40、d of 55% aluminum, 1.6% silicon and 43.4% zinc. The coating is applied to the base metal in a continuous hot dip method. The product is described in ASTM-792, coating classes of AZ 50, AZ 55 and AZ 60. These classes equate to an average minimum coating thickness of .50, .55 and .60 ounces per square

41、 foot. 5.12 GROUND GRID A system of grounding electrodes consisting of interconnected bare cables buried in the earth to provide a common ground. 5.13 GROUNDING ELECTRODE That portion of a lightning protection system extending into the earth, such as a ground rod, ground plate, or conductor, serving

42、 to bring the lightning protection system into electrical contact with the earth. MARCH 18, 2016 INSTALLATION REQUIREMENTS FOR LIGHTNING PROTECTION SYSTEMS - UL 96A 7UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL 5.14 GROUNDED Connected to

43、earth, or to a conductive material that is connected to earth, so that electric charges are distributed freely to the earth. 5.15 LIGHTNING PROTECTION SYSTEM A complete system of strike termination devices, conductors, grounding electrodes, interconnecting conductors, surge protective devices, conne

44、ctors or ttings. 5.16 LOOP CONDUCTOR A conductor: a) That encircles a structure; and b) That is used to interconnect grounding electrodes, main conductors, or other grounded bodies. 5.17 METAL BODY: a) Grounded (Non-Isolated) Metal Body A metal body having a ground path independent of the lightning

45、protection system. b) Isolated (Ungrounded) Metal Body A metal body having no ground path. 5.18 ROOF, FLAT OR GENTLY SLOPING A roof having a span of 40 feet (12.2 m) or less and a pitch of less than 1/8, or a roof having a span exceeding 40 feet (12.2 m) and a pitch less than 1/4. Roof pitch is dete

46、rmined by the method illustrated in Figure 5.1. 5.19 ROOF, TYPES Typical roof types are shown in Figure 5.2. This is generated text for gtxt. MARCH 18, 2016 INSTALLATION REQUIREMENTS FOR LIGHTNING PROTECTION SYSTEMS - UL 96A 8UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIB

47、UTION WITHOUT PERMISSION FROM UL This is generated text for gtxt. Figure 5.1 Determination of roof pitch Pitch (P)=Rise/Run Example: If Rise = 3 units, and Run = 12 units, Pitch = 3/12 = 1/4 MARCH 18, 2016 INSTALLATION REQUIREMENTS FOR LIGHTNING PROTECTION SYSTEMS - UL 96A 9UL COPYRIGHTED MATERIAL N

48、OT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL Figure 5.2 Roof types (Top and end views of each roof type are shown) Reproduced with permission from 2013 Annual Revision Cycle Report on Comments for NFPA 80 Standard for the Installation of Lightning Protection Syst

49、ems, Copyright 2012 National Fire Protection Association. This material has not been nally adopted as part of the referenced standards and is subject to revision or deletion as part of the NFPA document development process. It is not the complete and official position of the NFPA on the referenced subject which is represented solely by the standard in its entirety. MARCH 18, 2016 INSTALLATION REQUIREMENTS FOR LIGHTNING PROTECTION SYSTEMS - UL 96A 10UL