1、UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL UL 60079-0 Explosive atmospheres Part 0: Equipment General requirementsUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM ULUL COPYRIGHTED M
2、ATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL UL Standard for Safety for Explosive atmospheres Part 0: Equipment General requirements, UL 60079-0 Sixth Edition, Dated July 26, 2013 Summary of Topics ANSI/UL 60079-0 is an adoption of IEC 60079-0, the Stand
3、ard for Safety for Explosive Atmospheres Part 0: Equipment General Requirements, issued by the IEC June 2011). Please note that the national difference document incorporates all of the U.S. national differences for UL 60079-0. The new requirements are substantially in accordance with Proposal(s) on
4、this subject dated May 11, 2012 and December 21, 2012. 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 t
5、his 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 of pro
6、ts, 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 this S
7、tandard, 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 or devi
8、ation introduced while purchaser is storing an electronic Standard on the purchasers computer system. THE STANDARDS TECHNICAL PANEL FOR UL 60079-0 HAS DETERMINED THAT AS OF SEPTEMBER 1, 2018, EDITION 5 OF UL 60079-0 WILL BE WITHDRAWN AND MAY BE USED TO DETERMINE A PRODUCTS COMPLIANCE UNTIL THIS DATE
9、. The following table summarizes the active editions of UL 60079-0, and lists the established withdrawal date for each edition of this standard. JULY 26, 2013 UL 60079-0 tr1UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL Standard Edition Sta
10、tus of Edition (Active/Withdrawn) Established Withdrawal Date for Each Standard Edition 5 Active September 1, 2018 6 Active Active until further notice Note: These editions may be used to determine compliance for new or modied products until the dates shown. When the Standards Technical Panel has de
11、termined that all existing products shall be upgraded and assessed for compliance with a new standard edition, the edition number will be noted with an “*” in this table. JULY 26, 2013 UL 60079-0 tr2UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FR
12、OM UL ISA The International Society of Automation ANSI/ISA 60079-0 (12.00.01)-2012 Sixth Edition Underwriters Laboratories Inc. ANSI/UL 60079-0 Sixth Edition Explosive Atmospheres Part 0: Equipment General Requirements July 26, 2013 ANSI/UL 60079-0-2013UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURT
13、HER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL Commitment for Amendments This Standard is issued jointly by the International Society of Automation (ISA) and Underwriters Laboratories Incorporated (UL). Comments or proposals for revisions on any part of the standard may be submitted to
14、ISA or UL at any time. Revisions to this standard will be made only after processing according to the standards development procedures of ISA and UL. ISA and UL will issue revisions to this standard by means of a new edition or revised or additional pages bearing their date of issue. ISBN 978-0-8766
15、40-26-5 Copyright 2013 ISA These materials are subject to copyright claims of IEC, ANSI, and ISA. All rights reserved. Not for resale. Printed in the United States of America. No part of this publication may be reproduced in any form, including an electronic retrieval system, without the prior writt
16、en permission of ISA. All requests pertaining to this Standard should be submitted to ISA. The most recent designation of ANSI/ISA 60079-0 as an American National Standard (ANSI) occurred on July 26, 2013. Copyright 2013 Underwriters Laboratories Inc. ULs Standards for Safety are copyrighted by UL.
17、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 remain the sole and exclusive property of UL. This ANSI/UL Standard for Safety consists of the Sixth edition. The most rec
18、ent designation of ANSI/UL 60079-0 as an American National Standard (ANSI) occurred on July 26, 2013. ANSI approval for a standard does not include the Cover Page, Transmittal Pages, Title Page (front and back), or the Preface. The National Difference Page and IEC Foreword are also excluded from the
19、 ANSI approval of IEC-based standards. 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 ULs On-Line Collaborative Standards Development System (CSDS) at http:/. To purchase UL Standards, visit
20、Comm 2000 at http:/m- or call toll-free 1-888-853-3503.UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL CONTENTS General Notes 7 Preface (ISA) .8 National Differences . 13 FOREWORD . 14 1 Scope .17 2 Normative references .20 3 Terms and denit
21、ions 28 4 Equipment grouping 38 4.1 Group I 38 4.2 Group II 39 4.3 Group III .39 4.4 Equipment for a particular explosive atmosphere 40 5 Temperatures .40 5.1 Environmental inuences .40 5.2 Service temperature .41 5.3 Maximum surface temperature 41 6 Requirements for all electrical equipment .44 6.1
22、 General 44 6.2 Mechanical strength of equipment .46 6.3 Opening times 46 6.4 Circulating currents in enclosures (e.g. of large electrical machines) .47 6.5 Gasket retention 47 6.6 Electromagnetic and ultrasonic energy radiating equipment .48 7 Non-metallic enclosures and non-metallic parts of enclo
23、sures .50 7.1 General 50 7.2 Thermal endurance 52 7.3 Resistance to light .53 7.4 Electrostatic charges on external non-metallic materials 53 7.5 Accessible metal parts .57 8 Metallic enclosures and metallic parts of enclosures .58 8.1 Material composition .58 8.2 Group I 58 8.3 Group II 58 8.4 Grou
24、p III .59 9 Fasteners .59 9.1 General 59 9.2 Special fasteners 60 9.3 Holes for special fasteners .60 10 Interlocking devices .62 11 Bushings 62 12 Materials used for cementing .62 13 Ex Components 62 13.1 General .62 13.2 Mounting 63 13.3 Internal mounting .63 13.4 External mounting 63 JULY 26, 201
25、3 ANSI/ISA 60079-0 (12.00.01)-2012 ANSI/UL 60079-0 3UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL 13.5 Ex Component certicate 63 14 Connection facilities and termination compartments .63 14.1 General .63 14.2 Termination compartment .64 14
26、.3 Type of protection 64 14.4 Creepage and clearance 64 15 Connection facilities for earthing or bonding conductors .64 15.1 Equipment requiring earthing 64 15.2 Equipment not requiring earthing .65 15.3 Size of conductor connection 65 15.4 Protection against corrosion .66 15.5 Secureness of electri
27、cal connections .66 16 Entries into enclosures 66 16.1 General .66 16.2 Identication of entries 67 16.3 Cable glands 67 16.4 Blanking elements 68 16.5 Thread adapters .68 16.6 Temperature at branching point and entry point 68 16.7 Electrostatic charges of cable sheaths 69 17 Supplementary requiremen
28、ts for rotating machines .71 17.1 Ventilation .71 17.2 Bearings 74 18 Supplementary requirements for switchgear 74 18.1 Flammable dielectric 74 18.2 Disconnectors .74 18.3 Group I Provisions for locking 75 18.4 Doors and covers 75 19 Supplementary requirements for fuses 75 20 Supplementary requireme
29、nts for plugs, socket outlets and connectors 76 20.1 General .76 20.2 Explosive gas atmospheres .77 20.3 Explosive dust atmospheres .78 20.4 Energized plugs 78 21 Supplementary requirements for luminaires 78 21.1 General .78 21.2 Covers for luminaires of EPL Mb, EPL Gb, or EPL Db 79 21.3 Covers for
30、luminaires of EPL Gc or EPL Dc .79 21.4 Special lamps 80 22 Supplementary requirements for caplights and handlights 80 22.1 Group I caplights .80 22.2 Group II and Group III caplights and handlights 80 23 Equipment incorporating cells and batteries 80 23.1 General .80 23.2 Batteries 81 23.3 Cell typ
31、es .81 23.4 Cells in a battery .84 23.5 Ratings of batteries .84 23.6 Interchangeability 84 23.7 Charging of primary batteries 84 23.8 Leakage 84 23.9 Connections .84 23.10 Orientation .84 JULY 26, 2013 ANSI/ISA 60079-0 (12.00.01)-2012 ANSI/UL 60079-0 4UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURT
32、HER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL 23.11 Replacement of cells or batteries 85 23.12 Replaceable battery pack 85 24 Documentation .85 25 Compliance of prototype or sample with documents .85 26 Type tests .85 26.1 General .85 26.2 Test conguration 86 26.3 Tests in explosive te
33、st mixtures 86 26.4 Tests of enclosures .86 26.5 Thermal tests 91 26.6 Torque test for bushings 95 26.7 Non-metallic enclosures or non-metallic parts of enclosures .96 26.8 Thermal endurance to heat 96 26.9 Thermal endurance to cold 97 26.10 Resistance to light .97 26.11 Resistance to chemical agent
34、s for Group I electrical equipment .98 26.12 Earth continuity .99 26.13 Surface resistance test of parts of enclosures of non-metallic materials .100 26.14 Measurement of capacitance 101 26.15 Verication of ratings of ventilating fans .102 26.16 Alternative qualication of elastomeric sealing O-rings
35、 102 27 Routine tests 103 28 Manufacturers responsibility 103 28.1 Conformity with the documentation 103 28.2 Certicate 104 28.3 Responsibility for marking 104 29 Marking 104 29.1 Applicability .104 29.2 Location .105 29.3 General 105 29.4 Ex marking for explosive gas atmospheres .106 29.5 Ex markin
36、g for explosive dust atmospheres 112 29.6 Combined types (or levels) of protection .117 29.7 Multiple types of protection .117 29.8 Ga equipment using two independent Gb types (or levels) of protection .117 29.9 Ex Components .118 29.10 Small equipment and small Ex Components .119 29.11 Extremely sm
37、all equipment and extremely small Ex Components 120 29.12 Warning markings 120 29.13 Alternate marking of equipment protection levels (EPLs) 121 29.14 Cells and batteries .123 29.15 Converter-fed electrical machines 123 29.16 Examples of marking 1 124 30 Instructions .136 30.1 General 136 30.2 Cells
38、 and batteries 138 30.3 Electrical machines 139 30.4 Ventilating fans .139 JULY 26, 2013 ANSI/ISA 60079-0 (12.00.01)-2012 ANSI/UL 60079-0 5UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL Annex A (normative) Supplementary requirements for cab
39、le glands A.1 General 140 A.2 Constructional requirements 141 A.2.1 Cable sealing 141 A.2.2 Filling compounds 142 A.2.3 Clamping 142 A.2.4 Lead-in of cable 143 A.2.5 Release by a tool .144 A.2.6 Fixing .144 A.2.7 Degree of protection 144 A.3 Type tests .144 A.3.1 Tests of clamping of non-armoured an
40、d braided cables .144 A.3.2 Tests of clamping of armoured cables 147 A.3.3 Type test for resistance to impact 148 A.3.4 Test for degree of protection (IP) of cable glands .148 A.4 Marking 149 A.4.1 Marking of cable glands .149 A.4.2 Marking of cable-sealing rings .149 Annex B (normative) Requirement
41、s for Ex components Annex C (informative) Example of rig for resistance to impact test Annex D (informative) Motors supplied by converters Annex E (informative) Temperature rise testing of electric machines Annex F (Informative) Guideline owchart for tests of non-metallic enclosures or non-metallic
42、parts of enclosures (26.4) Annex DVG (Informative) Common Standards Safety Requirements for Electrical Equipment Annex DVH (informative) Equipment grounding Bibliography JULY 26, 2013 ANSI/ISA 60079-0 (12.00.01)-2012 ANSI/UL 60079-0 6UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR
43、 DISTRIBUTION WITHOUT PERMISSION FROM UL General Notes This is the common ISA and UL Standard for Explosive Atmospheres Part 0: Equipment General Requirements. It is the Sixth edition of ANSI/ISA 60079-0 (superceding ANSI/ISA 60079-0-2009) and the Sixth edition of ANSI/UL 60079-0. This document is a
44、 modication of the IEC document and includes U.S. deviations encompassing both additions and deletions of information. ANSI/ISA 60079-0 and ANSI/UL 60079-0 contain identical requirements, and identical publication dates. The presentation and format of the standards material may differ between the tw
45、o published standards. This common standard was prepared by International Society of Automation (ISA) and Underwriters Laboratories Inc. (UL). Note: Although the intended primary application of this standard is stated in its scope, it is important to note that it remains the responsibility of the us
46、ers of the standard to judge its suitability for their particular purpose. Level of harmonization This standard adopts the IEC text with deviations. The requirements are presented in different formats. The ISA version of the standard illustrates the national differences from the IEC text through the
47、 use of legislative text (strike-out and underline). The UL version of the standard illustrates national differences immediately following the IEC text. National differences between the UL version and the ISA version shall be word for word except for editorial changes. Interpretations The interpreta
48、tion by the SDO of an identical or equivalent standard shall be based on the literal text to determine compliance with the standard in accordance with the procedural rules of the SDO. If more than one interpretation of the literal text has been identied, a revision shall be proposed as soon as possi
49、ble to each of the SDOs to more accurately reect the intent. UL Effective Date The effective date for UL is the date of publication. However, the fth edition of UL 60079-0 will also be effective until September 1, 2018. A UL effective date is one established by Underwriters Laboratories Inc. and is not part of the ANSI approved standard. JULY 26, 2013 ANSI/ISA 60079-0 (12.00.01)-2012 ANSI/UL 60079-0 7UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHE
