1、UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL UL 96A Installation Requirements for Lightning Protection SystemsUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM ULUL COPYRIGHTED MATERIA
2、L NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL UL Standard for Safety for Installation Requirements for Lightning Protection Systems, UL 96A Twelfth Edition, Dated May 23, 2007 Summary of Topics Revision pages have been issued for the Standard for Installation R
3、equirements for Lightning Protection Systems, UL 96A, to incorporate the proposals dated February 10, 2014 and June 5, 2014. These proposals include the following: Addition of paragraph 1.2.1 and 1.2.2 to Scope section to clarify a partial system. Addition of paragraph 1.2.3 to Scope section regardi
4、ng adjacent structures. Addition of paragraphs 1.2.4 and 1.2.5 to Scope section to clarify walkways. Addition of denition of an adjacent structure to section 5. Revision of Figure 5.2 to include at roof types. Addition of exception to paragraph 7.5 covering copper conductors. 12 inch up hill rise al
5、lowed at through roof assemblies. Addition of paragraph 10.4.4 covering grounding to a bus bar. Revision to the bonding denition. Text that has been changed in any manner or impacted by ULs electronic publishing system is marked with a vertical line in the margin. Changes in requirements are marked
6、with a vertical line in the margin and are followed by an effective date note indicating the date of publication or the date on which the changed requirement becomes effective. The revised requirements are substantially in accordance with Proposal(s) on this subject dated February 10, 2014 and June
7、5, 2014. 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 provides this Standard as is without warranty of any kin
8、d, 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 of prots, lost savings, loss of data, or any other d
9、amages 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 this Standard, regardless of the form of the claim.
10、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 or deviation introduced while purchaser is storing an
11、 electronic Standard on the purchasers computer system. AUGUST 12, 2014 UL 96A tr1UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL The requirements in this Standard are now in effect, except for those paragraphs, sections, tables, gures, and/
12、or other elements of the Standard having future effective dates as indicated in the note following the affected item. The prior text for requirements that have been revised and that have a future effective date are located after the Standard, and are preceded by a SUPERSEDED REQUIREMENTS notice. AUG
13、UST 12, 2014 UL 96A tr2UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL MAY 23, 2007 (Title Page Reprinted: August 12, 2014) 1 UL 96A Standard for Installation Requirements for Lightning Protection Systems Prior to the sixth edition, previous
14、 numbered and unnumbered editions covering Installation Requirements for Lightning 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 E
15、dition June, 1963 Ninth Edition April, 1982 Tenth Edition May, 1994 Eleventh Edition July, 2001 Twelfth Edition May 23, 2007 This UL Standard for Safety consists of the Twelfth Edition including revisions through August 12, 2014. Comments or proposals for revisions on any part of the Standard may be
16、 submitted to UL at any time. Proposals should be submitted via a Proposal Request in 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
17、Standards and all copyrights, ownerships, and rights regarding those Standards shall remain the sole and exclusive property of UL. COPYRIGHT 2014 UNDERWRITERS LABORATORIES INC.UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL AUGUST 12, 2014 I
18、NSTALLATION REQUIREMENTS FOR LIGHTNING PROTECTION SYSTEMS - UL 96A 2 No Text on This PageUL 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 Gloss
19、ary 6A PROTECTION FOR ORDINARY BUILDINGS 6 General .10 7 Materials 11 8 Strike Termination Devices 12 8.1 General 12 8.2 Zone of protection 12A 8.3 Dormers 14 8.4 Intermediate ridges 14 8.5 Irregular roof lines .14 8.6 Open areas .14 8.7 Domed or curved roofs .14 8.8 Chimneys, vents and roof top met
20、al bodies .15 9 Conductors 26 9.1 General 26 9.2 Roof conductors .30 9.3 Down conductors 31 9.4 Interconnecting conductors .33 10 Grounding .33 10.1 General .33 10.2 Multiple ground rods 36 10.3 Shallow topsoil .38 10.4 Common grounds 39 10.5 Concrete-encased electrodes 39 10.6 Ground ring electrode
21、 .40 11 Metal Bodies Subject to Direct Strikes .40 12 Connectors and Fittings .44 13 Surge Protection 44A 14 Concealed Installations 44B 15 Structural Steel Framing .46 PROTECTION FOR MISCELLANEOUS STRUCTURES 16 General 48 PROTECTION FOR HEAVY-DUTY STACKS 17 Mechanical Execution of Work .49 18 Compo
22、nents .49 19 Corrosion Protection 49 20 Air Terminals 49 21 Conductors 51 AUGUST 12, 2014 INSTALLATION REQUIREMENTS FOR LIGHTNING PROTECTION SYSTEMS - UL 96A 3UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL 22 Fasteners 51 23 Bonding .52 24
23、Splices 52 25 Metal Stacks 52 26 Metal Guy Wires and Cables 53 SUPPLEMENT SA - MATERIAL REQUIREMENTS MAY 23, 2007 INSTALLATION REQUIREMENTS FOR LIGHTNING PROTECTION SYSTEMS - UL 96A 4UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL INTRODUCTI
24、ON 1 Scope 1.1 These requirements cover the installation of lightning protection systems 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 requi
25、rements apply to lightning protection systems that are complete and cover all parts of a structure. Partial systems are not covered by this standard. 1.2.1 These requirements shall not apply to adjacent structures. 1.2.1 added August 12, 2014 1.2.2 Adjacent structures shall be considered separate st
26、ructures. 1.2.2 added August 12, 2014 1.2.3 Adjacent structures with lightning protection shall be considered part of the structure if the adjacent structures lightning protection system complies with this standard and is connected to the lightning protection system of the structure in accordance wi
27、th Section 10.4. 1.2.3 added August 12, 2014 1.2.4 Walkways that are attached to a structure shall be considered part of that structure. 1.2.4 added August 12, 2014 1.2.5 Free standing Walkways shall be considered an adjacent structure under the following conditions: a) It is separated by a re wall
28、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 facilities has an SPD in accordance with Section 13. 1.2.5 added August 12, 2014 1.3 This standard do
29、es 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. 1.3 revised October 4, 2010 1.3.1 Enclosed generators and conventional building
30、structures at or associated with generators or power plants, etc. are covered. 1.3.1 added October 4, 2010 AUGUST 12, 2014 INSTALLATION REQUIREMENTS FOR LIGHTNING PROTECTION SYSTEMS - UL 96A 5UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL 1
31、.4 These requirements do not cover lightning protection components, which are covered by the Standard for Lightning Protection Components, UL 96. 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. 2.2
32、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 accordance w
33、ith 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, and s
34、hall 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, washers a
35、nd nails. 2.5 revised January 31, 2014 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 standa
36、rd shall be interpreted as referring to the latest edition of that code or standard. AUGUST 12, 2014 INSTALLATION REQUIREMENTS FOR LIGHTNING PROTECTION SYSTEMS - UL 96A 6UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL 5 Glossary 5.1 For the
37、purpose of this standard, the following denitions apply. 5.1.1 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 lightning protection. 5.1.1 added August 12, 2014 5.2 AIR TERMINAL A type of strike termina
38、tion device intentionally installed for the purpose of intercepting lightning ashes. These items are sometimes referred to as lightning rods. 5.3 BONDING (POTENTIAL EQUALIZATION) An electrical connection between an electrically conductive object and a component of a lightning protection system with
39、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. 5.3 revised August 12, 2014 5.4 BUILDINGS: a) Ordinary Building A building of common or conventional construction u
40、sed for ordinary purposes, whether commercial, farm, industrial, institutional, or 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 b
41、uilding with either sides or roof made of or covered with sheet metal. e) Metal-Framed Building A building with electrically continuous framing of sufficient size and conductivity to be used as part of the lightning protection system. 5.5 CHIMNEY A smoke or vent stack not meeting the requirements of
42、 a heavy-duty stack. 5.6 CONDUCTOR The portion of a lightning protection system intended 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 t
43、o conduct primary lightning currents that interconnects strike termination devices with grounding electrodes. AUGUST 12, 2014 INSTALLATION REQUIREMENTS FOR LIGHTNING PROTECTION SYSTEMS - UL 96A 6AUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM
44、UL AUGUST 12, 2014 INSTALLATION REQUIREMENTS FOR LIGHTNING PROTECTION SYSTEMS - UL 96A 6B No Text on This PageUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL b) Secondary Conductor A conductor that connects metal bodies within the zone of pr
45、otection to the lightning protection system to eliminate electrical potential that may create arcing. 5.7 EARTH Finished grade level around a structure. 5.7.1 ELECTRICALLY CONTINUOUS An uninterrupted electrically conductive path or one made electrically continuous by being bonded together by welding
46、, brazing, compression tting or suitable bonding plate. 5.7.1 added January 31, 2014 5.8 FASTENER An attachment to secure a conductor to a structure. 5.8.1 GALVALUME An aluminum coated sheet steel product. It is comprised of 55% aluminum, 1.6% silicon and 43.4% zinc. The coating is applied to the ba
47、se 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 foot. 5.8.1 added October 4, 2010 5.9 GROUND GRID A system of grounding electro
48、des consisting of interconnected bare cables buried in the earth to provide a common ground. 5.10 GROUNDING ELECTRODE That portion of a lightning protection system extending into the earth, such as a ground rod, ground plate, or conductor, serving to bring the lightning protection system into electr
49、ical contact with the earth. 5.11 GROUNDED Connected to earth, or to a conductive material that is connected to earth, so that electric charges are distributed freely to the earth. 5.12 LIGHTNING PROTECTION SYSTEM A complete system of strike termination devices, conductors, grounding electrodes, interconnecting conductors, surge protective devices, connectors or ttings. 5.13 LOOP CONDUCTOR A conductor: a) That encircles a structure; and b) That is
