1、UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULUL 60079-0Explosive atmospheres Part0: Equipment GeneralrequirementsUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULUL COPYRIGHTED MATERIA
2、L NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULUL Standard for Safety for Explosive atmospheres Part 0: Equipment General requirements, UL60079-0Fifth Edition, Dated October 21, 2009Summary of TopicsThis revision to ANSI/UL 60079-0, the Standard for Safety for Exp
3、losive Atmospheres Part 0:Equipment General Requirements is issued to note the November 16, 2009 ANSI approval dateof ANSI/ISA 60079-0.As noted in the Commitment for Amendments statement located on the back side of the titlepage, UL and ISA are committed to updating this bi-national standard jointly
4、. However, therevision pages dated December 8, 2009 will not be issued by ISA as revision pages but as anupdate to their standard.Text that has been changed in any manner or impacted by ULs electronic publishing system is markedwith a vertical line in the margin.All rights reserved. No part of this
5、publication may be reproduced, stored in a retrieval system, ortransmitted in any form by any means, electronic, mechanical photocopying, recording, or otherwisewithout prior permission of UL.UL provides this Standard as is without warranty of any kind, either expressed or implied, including butnot
6、limited to, the implied warranties of merchantability or fitness for any purpose.In no event will UL be liable for any special, incidental, consequential, indirect or similar damages,including loss of profits, lost savings, loss of data, or any other damages arising out of the use of or theinability
7、 to use this Standard, even if UL or an authorized UL representative has been advised of thepossibility of such damage. In no event shall ULs liability for any damage ever exceed the price paid forthis Standard, regardless of the form of the claim.Users of the electronic versions of ULs Standards fo
8、r Safety agree to defend, indemnify, and hold ULharmless from and against any loss, expense, liability, damage, claim, or judgment (including reasonableattorneys fees) resulting from any error or deviation introduced while purchaser is storing an electronicStandard on the purchasers computer system.
9、The requirements in this Standard are now in effect, except for those paragraphs, sections, tables, figures,and/or other elements of the Standard having future effective dates as indicated in the preface. The priortext for requirements that have been revised and that have a future effective date are
10、 located after theStandard, and are preceded by a SUPERSEDED REQUIREMENTS notice.DECEMBER 8, 2009 UL 60079-0 tr1UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULDECEMBER 8, 2009 UL 60079-0tr2No Text on This PageUL COPYRIGHTED MATERIAL NOT AUTHO
11、RIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULISA The International Society of AutomationANSI/ISA 60079-0 (12.00.01)-2009Fifth EditionUnderwriters Laboratories Inc.ANSI/UL 60079-0Fifth EditionExplosive atmospheres Part 0: Equipment General requirementsOctober 21, 2009(Title
12、 Page Reprinted: December 8, 2009)ANSI/UL 60079-0-2009UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULCommitment for AmendmentsThis Standard is issued jointly by the International Society of Automation (ISA) and UnderwritersLaboratories Incorp
13、orated (UL). Amendments to this Standard will be made only after processingaccording to the Standards writing procedures by ISA and UL. ISA and UL will issue revisions to thisstandard by means of a new edition or revised or additional pages bearing their date of issue.ISBN 978-1-936007-30-1Copyright
14、 2009ISAThese materials are subject to copyright claims of IEC, ANSI, and ISA. All rights reserved. Not forresale. Printed in the United States of America. No part of this publication may be reproduced in anyform, including an electronic retrieval system, without the prior written permission of ISA.
15、 All requestspertaining to this Standard should be submitted to ISA.The most recent designation of ANSI/ISA 60079-0 as an American National Standard (ANSI) occurredon November 16, 2009.Copyright 2009 Underwriters Laboratories Inc.ULs Standards for Safety are copyrighted by UL. Neither a printed nor
16、electronic copy of a Standardshould be altered in any way. All of ULs Standards and all copyrights, ownerships, and rights regardingthose Standards shall remain the sole and exclusive property of UL.This ANSI/UL Standard for Safety consists of the Fifth edition including revisions through December 8
17、,2009.The most recent designation of ANSI/UL 60079-0 as an American National Standard (ANSI) occurredon October 21, 2009. ANSI approval for a standard does not include the Cover Page, TransmittalPages, Title Page (front and back), or the Preface. The National Difference Page and IEC Forewordare also
18、 excluded from the 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 StandardsDevelopment System (CSDS) at http:/.To purchase UL Sta
19、ndards, visit Comm 2000 at http:/m- call toll-free 1-888-853-3503.UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULCONTENTSGeneral Notes 7Preface (ISA) .8National Differences .12FOREWORD .131 Scope 152 Normative references .183 Terms and defini
20、tions 264 Equipment grouping 344.1 Group I 344.2 Group II 354.3 Group III .354.4 Equipment for a particular explosive atmosphere 365 Temperatures .365.1 Environmental influences .365.2 Service temperature .375.3 Maximum surface temperature 386 Requirements for all electrical apparatus 416.1 General
21、416.2 Mechanical strength of equipment .426.3 Opening times 436.4 Circulating currents 436.5 Gasket retention 446.6 Electromagnetic and ultrasonic energy radiating equipment .447 Non-metallic enclosures and non-metallic parts of enclosures .467.1 General 467.2 Thermal endurance 487.3 Resistance to l
22、ight .487.4 Electrostatic charges on external non-metallic materials 497.5 Threaded holes .528 Metallic enclosures and metallic parts of enclosures .528.1 Material composition .528.2 Threaded holes .559 Fasteners .559.1 General 559.2 Special fasteners 559.3 Holes for special fasteners .5610 Interloc
23、king devices .5711 Bushings 5712 Materials used for cementing .5713 Ex components .5813.1 General .5813.2 Mounting 5813.3 Internal mounting .5813.4 External mounting 5914 Connection facilities and termination compartments .5914.1 General .59OCTOBER 21, 2009 ANSI/ISA 60079-0 (12.00.01)-2009 ANSI/UL 6
24、0079-0 3UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM UL14.2 Termination compartment .5914.3 Type of protection 5914.4 Creepage and clearance 5915 Connection facilities for earthing or bonding conductors .5915.1 Equipment requiring earthing 59
25、15.2 Equipment not requiring earthing .6015.3 Size of conductor connection 6115.4 Protection against corrosion .6215.5 Secureness of electrical connections .6216 Entries into enclosures 6216.1 General .6216.2 Identification of entries 6316.3 Cable glands 6316.4 Blanking elements 6316.5 Temperature a
26、t branching point and entry point 6416.6 Electrostatic charges of cable sheaths 6417 Supplementary requirements for rotating electrical machines .6617.1 Fans and fan hoods 6617.2 Ventilation openings for external fans .6617.3 Construction and mounting of the ventilating systems .6617.4 Clearances fo
27、r the ventilating system .6717.5 Materials for external fans and fan hoods .6717.6 Equipotential bonding conductors 6718 Supplementary requirements for switchgear 6718.1 Flammable dielectric 6718.2 Disconnectors .6818.3 Group I Provisions for locking 6818.4 Doors and covers 6919 Supplementary requir
28、ements for fuses 6920 Supplementary requirements for plugs, socket outlets and connectors 6920.1 Interlocking 6920.2 Energized plugs 7121 Supplementary requirements for luminaires 7121.1 General .7121.2 Covers for luminaires of EPL Gb or EPL Db .7121.3 Covers for luminaires of EPL Gc or EPL Dc .7221
29、.4 Special lamps 7222 Supplementary requirements for caplights and handlights 7222.1 Group I caplights .7222.2 Group II and Group III caplights and handlights 7323 Equipment incorporating cells and batteries 7323.1 General .7323.2 Batteries 7323.3 Cell types .7323.4 Cells in a battery .7423.5 Rating
30、s of batteries .7423.6 Interchangeability 7523.7 Charging of primary batteries 7523.8 Leakage 7523.9 Connections .7523.10 Orientation .7523.11 Replacement of cells or batteries 7523.12 Replaceable battery pack 76OCTOBER 21, 2009ANSI/ISA 60079-0 (12.00.01)-2009 ANSI/UL 60079-04UL COPYRIGHTED MATERIAL
31、 NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM UL24 Documentation .7625 Compliance of prototype or sample with documents .7626 Type tests .7626.1 General .7626.2 Test configuration 7726.3 Tests in explosive test mixtures 7726.4 Tests of enclosures .7726.5 Thermal tes
32、ts 8226.6 Torque test for bushings 8526.7 Non-metallic enclosures or non-metallic parts of enclosures .8626.8 Thermal endurance to heat 8726.9 Thermal endurance to cold 8726.10 Resistance to light .8826.11 Resistance to chemical agents for Group I electrical equipment .8826.12 Earth continuity .8926
33、.13 Surface resistance test of parts of enclosures of non-metallic materials 9126.14 Charging tests 9226.15 Measurement of capacitance .9627 Routine tests .9728 Manufacturers responsibility .9728.1 Conformity with the documentation .9728.2 Certificate .9828.3 Responsibility for marking .9829 Marking
34、 9829.1 Location .9829.2 General .9929.3 Ex marking for explosive gas atmospheres .10029.4 Ex marking for explosive dust atmospheres 10329.5 Combined types of protection .10629.6 Multiple types of protection .10629.7 Ga using two independent Gb types of protection .10729.8 Ex components .10729.9 Sma
35、ll equipment and small Ex components 10829.10 Extremely small equipment and extremely small Ex components .10929.11 Warning markings 10929.12 Alternate marking of equipment protection levels (EPLs) 11029.13 Cells and batteries .11229.14 Examples of marking311329.15DV.1 External grounding or bonding
36、terminals 11929.16DV.1 Class I, Division 2, Equivalency Marking 11929.16DV.2 Class I, Division 2, Group C 12029.16DV.3 Class I, Division 2, Group B .12029.16DV.4 Class I, Division 2, Group A .12029.17DV.1 Class I, Division 1, Equivalency Marking 12029.17DV.2 Class I, Division 1, Group C 12029.17DV.3
37、 Class I, Division 1, Group B .12129.17DV.4 Class I, Division 1, Group A .12129.18DV.1 Abbreviated Markings 12130 Instructions .12130.1 General 12130.2 Cells and batteries 122OCTOBER 21, 2009 ANSI/ISA 60079-0 (12.00.01)-2009 ANSI/UL 60079-0 5UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODU
38、CTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULAnnex A (normative) Supplementary requirements for cable glandsA.1 General 123A.2 Constructional requirements 123A.2.1 Cable sealing 123A.2.2 Filling compounds 124A.2.3 Clamping 124A.2.4 Lead-in of cable 125A.2.5 Release by a tool .126A.2.6 Fixing .126A
39、.2.7 Degree of protection 126A.3 Type tests .126A.3.1 Tests of clamping of non-armoured and braided cables .126A.3.2 Tests of clamping of armoured cables 129A.3.3 Type test for resistance to impact 130A.3.4 Test for degree of protection (IP) of cable glands .130A.4 Marking 130A.4.1 Marking of cable
40、glands .130A.4.2 Marking of cable-sealing rings .131Annex B (normative) Requirements for Ex componentsAnnex C (informative) Example of rig for resistance to impact testAnnex D (informative) Introduction of an alternative risk assessment method encompassing“equipment protection levels” for Ex equipme
41、ntD.1 Historical background .136D.2 General 137D.2.1 Mines susceptible to firedamp (Group I) .137D.2.2 Gases (Group II) .137D.2.3 Dusts (Group III) .138D.3 Risk of ignition protection afforded 139D.4 Implementation .139Annex E (informative) Motors supplied by convertersAnnex DVF (Informative) Common
42、 Standards Safety Requirements for Electrical EquipmentAnnex DVG (informative) Equipment groundingBibliographyOCTOBER 21, 2009ANSI/ISA 60079-0 (12.00.01)-2009 ANSI/UL 60079-06UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULGeneral NotesThis is
43、 the common ISA and UL Standard for Explosive atmospheres Part 0: Equipment Generalrequirements. It is the Fifth edition of ANSI/ISA 60079-0 and the Fifth edition of ANSI/UL 60079-0. Thisdocument is a modification of the IEC document and includes U.S. deviations encompassing bothadditions and deleti
44、ons of information.ISA 60079-0 and UL 60079-0 contain identical requirements, and identical publication dates. Thepresentation and format of the standards material may differ between the two published standards.This common standard was prepared by International Society of Automation (ISA) and Underw
45、ritersLaboratories Inc. (UL).Although the intended primary application of this standard is stated in its scope, it is important to note thatit remains the responsibility of the users of the Standard to judge its suitability for their particular purpose.Note: Although the intended primary application
46、 of this standard is stated in its scope, it is important to note that it remains theresponsibility of the users of the standard to judge its suitability for their particular purpose.Level of harmonizationThis standard adopts the IEC text with deviations.The requirements are presented in different f
47、ormats. The ISA version of the standard illustrates thenational differences from the IEC text through the use of legislative text (strike-out and underline). The ULversion of the standard illustrates national differences immediately following the IEC text. Nationaldifferences between the UL version
48、and the ISA version shall be word for word except for editorialchanges.InterpretationsThe interpretation by the SDO of an identical or equivalent standard shall be based on the literal text todetermine compliance with the standard in accordance with the procedural rules of the SDO. If more thanone i
49、nterpretation of the literal text has been identified, a revision shall be proposed as soon as possibleto each of the SDOs to more accurately reflect the intent.UL Effective DateAs of October 21, 2009 all products Listed or Recognized by UL must comply with the requirements inthis standard except for clauses in the following list, which are effective December 31, 2012.Clauses 6.6, 7.2.2, 7.3, 9.2 9.3, 26.4.1.2.2, 29.2 c)Between October 21, 2009 and December 31, 2012, new pro
