1、UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULNational Differences ForUL 60079-30-1Explosive Atmospheres Part 30-1: Electrical Resistance Trace Heating General and TestingRequirementsUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODU
2、CTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULNational Differences ForUL 60079-30-1Explosive Atmospheres Part 30-1: Electrical Resistance Trace Heating General and TestingRequirementsFirst EditionEdition Date: MAY 5, 2017Adoption of IEC/IEEE 60079-30-1, Explosive Atmospheres - Part 30-1: Electrical
3、 Resistance TraceHeating General and Testing Requirements (first edition, issued by IEC September 2015) as anew IEC/IEEE based UL standard, UL 60079-30-1 with US National Differences.This document provides a single listing of the National Differences included in the UL adoption ofthe corresponding I
4、EC standard.All rights reserved. No part of this 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 standards document as is without warranty
5、of any kind, either expressed or implied,including but not 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
6、any other damages arising out of the use of or theinability to use this standards document, even if UL or an authorized UL representative has been advisedof the possibility of such damage. In no event shall ULs liability for any damage ever exceed the pricepaid for this standards document, regardles
7、s of the form of the claim.Users of the electronic versions of ULs Standards for 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 whil
8、e purchaser is storing an electronicStandard on the purchasers computer system.Copyright 2017 Underwriters Laboratories Inc.MAY 5, 2017NATIONAL DIFFERENCES FOR UL 60079-30-12UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULPrefaceThis document
9、provides a single listing of the technical National Differences included in the UL adoptionof the corresponding IEC standard.In its IEC-based standards, UL uses the notations indicated below to identify national difference type, andthese types are additionally noted in this document. The standard ma
10、y not use all types of thesedeviations.D1 - These are deviations which are based on basic safety principles and requirements, elimination ofwhich would compromise safety for U.S. consumers and users of products.D2 - These are deviations based on safety practices. These are deviations for IEC require
11、ments that maybe acceptable, but adopting the IEC requirements would require considerable retesting or redesign on themanufacturers part.DC - These are deviations based on the component standards and will not be deleted until a particularcomponent standard is harmonized with the IEC component standa
12、rd.DE - These are deviations based on editorial comments or corrections.DR - These are deviations based on the national regulatory requirements.Each national difference contains a description of what the national difference entails. Typically one of thefollowing words is used to explain how the text
13、 of the national difference is to be applied to the base IECtext:Addition / Add - An addition entails adding a complete new numbered clause, subclause, table, figure,or annex. Addition is not meant to include adding select words to the base IEC text.Deletion / Delete - A deletion entails complete de
14、letion of an entire numbered clause, subclause, table,figure, or annex without any replacement text.Modification / Modify - A modification is an altering of the existing base IEC text such as the addition,replacement or deletion of certain words or the replacement of an entire clause, subclause, tab
15、le, figure,or annex of the base IEC text.MAY 5, 2017 NATIONAL DIFFERENCES FOR UL 60079-30-1 3UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULNational Differences1DV DR Modification of Clause 1 to replace with the following:This part of IEC 600
16、79 standard specifies general and testing requirements for electricalresistance trace heaters for application in explosive atmospheres with the exclusion ofthose for EPL Ga and Da. This standard covers trace heaters that comprise either factoryor field (work-site) assembled units, and which may be s
17、eries trace heaters, parallel traceheaters, trace heater pads, or trace heater panels that have been assembled and/orterminated in accordance with the manufacturers instructions.This standard also includes requirements for termination assemblies and control methodsused with trace heating systems. Th
18、e explosive atmospheres referred to in this standardare those defined in IEC 60079-10-1 and IEC 60079-10-2.Annexes D and E outline the application of this standard for those users applying theDivision method of area classification.This standard supplements and modifies the general requirements of IE
19、C 60079-0 UL60079-0, except as indicated in Table 1. Where a requirement of this standard conflicts witha requirement of IEC 60079-0 UL 60079-0, the requirement of this standard takesprecedence.Where references are made to other IEC 60079 standards, the reference requirementsfound in these standards
20、 apply as modified by any applicable U.S. National Differences.Table 1 Application or exclusion of specific clauses of IEC 60079-0 UL 60079-0IEC UL 60079-0 Electrical resistance trace heaters and integralcomponentsTerminations asseparate componentsEd. 6.0 (2011)(informative)Clause / Subclause title(
21、normative)Group I and Group II Group III1 Scope Applies Applies Applies2 Normative references Applies Applies Applies3 Terms and definitions Applies, exceptambient temperature,see 3.1Applies, exceptambient temperature,see 3.1Applies, exceptambient temperature,see 3.14 Equipment grouping Applies Appl
22、ies Applies4.1 Group I Applies Excluded Applies4.2 Group II Applies, always IIC Excluded Applies4.3 Group III Excluded Applies, outside ofthermal insulation only,always IIICApplies, outside ofthermal insulation only4.4 Equipment for a particularexplosive atmosphereExcluded Excluded Applies5.1 Enviro
23、nmental influences Applies Applies Applies5.1.1 Ambient temperature Replaced by 6.1e) Replaced by 6.1e) Applies, see 3.15.1.2 External source of heatingor coolingApplies Applies Applies5.2 Service temperature Modified Modified AppliesMAY 5, 2017NATIONAL DIFFERENCES FOR UL 60079-30-14Table 1 Applicat
24、ion or exclusion of specific clauses of IEC 60079-0 UL 60079-0 Continued on NextPageUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULTable 1 Application or exclusion of specific clauses of IEC 60079-0 UL 60079-0 (Continued)IEC UL 60079-0 Electr
25、ical resistance trace heaters and integralcomponentsTerminations asseparate componentsEd. 6.0 (2011)(informative)Clause / Subclause title(normative)Group I and Group II Group III5.3.1 Determination of maximumsurface temperatureReplaced by 4.5 inconjunction with 5.1.13Replaced by 4.5 inconjunction wi
26、th 5.1.13only when tested inaccordance with5.1.13.3.Applies5.3.2.1 Group I electricalequipmentApplies Excluded Applies5.3.2.2 Group II electricalequipmentApplies Excluded Applies5.3.2.3.1 Group III electricalequipment, Maximumsurface temperaturedetermined without a dustlayerExcluded Applies, where t
27、hemaximum sheathtemperaturesdetermined by IEC/IEEE 60079-30-1 areused in place of themethod for temperaturedetermination from IEC60079-0 UL 60079-0.Applies5.3.2.3.2 Group III electricalequipment Maximumsurface temperature withrespect to dust layersExcluded Applies, where themaximum sheathtemperature
28、 isdetermined only forthose surfaces that arespecified to beexposed to layers ofcombustible dust.AppliesDoes not apply fortrace heaters specifiedto be covered bythermal insulation.5.3.3 Small componenttemperature for Group I andGroup II electricalequipmentExcluded Excluded Applies6.1 Requirements fo
29、r allelectrical equipment GeneralApplies Applies Applies6.2 Mechanical strength Replaced by 4.2 Replaced by 4.2 When in direct contactwith the trace heater,may be substituted by4.26.3 Opening times Excluded Excluded Applies6.4 Circulating currents inenclosures (e.g. of largeelectrical machines)Exclu
30、ded Excluded Excluded6.5 Gasket retention Excluded Excluded Applies6.6 Electromagnetic andultrasonic radiatingequipmentExcluded Excluded Applies7.1.1 Non-metallic enclosuresand non-metallic parts ofenclosures ApplicabilityReplaced by the lastparagraph of 4.1Replaced by the lastparagraph of 4.1Applie
31、sMAY 5, 2017 NATIONAL DIFFERENCES FOR UL 60079-30-1 5Table 1 Application or exclusion of specific clauses of IEC 60079-0 UL 60079-0 Continued on NextPageUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULTable 1 Application or exclusion of specif
32、ic clauses of IEC 60079-0 UL 60079-0 (Continued)IEC UL 60079-0 Electrical resistance trace heaters and integralcomponentsTerminations asseparate componentsEd. 6.0 (2011)(informative)Clause / Subclause title(normative)Group I and Group II Group III7.1.2.1 Specification of materials,GeneralReplaced by
33、 the lastparagraph of 4.1Replaced by the lastparagraph of 4.1Applies7.1.2.2 Specification of materials,plastic materialsReplaced by the lastparagraph of 4.1Replaced by the lastparagraph of 4.1Applies7.1.2.3 Elastomers Replaced by the lastparagraph of 4.1Replaced by the lastparagraph of 4.1Applies7.2
34、 Thermal endurance Replaced byrequirements and testsof this standardReplaced byrequirements and testsof this standardApplies7.3 Resistance to light Replaced by 5.1.16 fortrace heaters andintegral componentsspecified for outdoorexposureReplaced by 5.1.16 fortrace heaters andintegral componentsspecifi
35、ed for outdoorexposureApplies7.4.1 Electrostatic charges onexternal non-metallicmaterials, ApplicabilityExcluded Excluded Applies7.4.2 Avoidance of a build-up ofelectrostatic charge onGroup I or Group IIelectrical equipmentExcluded Excluded Applies7.4.3 Avoidance of a build-up ofelectrostatic charge
36、 onequipment for Group IIIExcluded Excluded Applies7.5 Accessible metal parts Excluded Excluded Applies8.1 Material composition Excluded Excluded Applies8.2 Group I Excluded Excluded Applies8.3 Group II Excluded Excluded Applies8.4 Group III Excluded Excluded Applies9 Fasteners Excluded Excluded App
37、lies10 Interlocking devices Excluded Excluded Applies11 Bushings Excluded Excluded Applies12 Materials used forcementingReplaced by the lastparagraph of 4.1Replaced by the lastparagraph of 4.1Applies13 Ex Components Applies Applies Applies14 Connection facilities andtermination compartmentsCovered b
38、y therequirements of thisstandardCovered by therequirements of thisstandardApplies15 Connection facilities forearthing and bondingconductorsReplaced by 5.1.15 Replaced by 5.1.15 Applies16 Entries into enclosures Excluded Excluded Applies17 Supplementaryrequirements for rotatingelectrical machinesExc
39、luded Excluded Excluded18 Supplementaryrequirements forswitchgearExcluded Excluded Excluded19 Supplementaryrequirements for fusesExcluded Excluded AppliesMAY 5, 2017NATIONAL DIFFERENCES FOR UL 60079-30-16Table 1 Application or exclusion of specific clauses of IEC 60079-0 UL 60079-0 Continued on Next
40、PageUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULTable 1 Application or exclusion of specific clauses of IEC 60079-0 UL 60079-0 (Continued)IEC UL 60079-0 Electrical resistance trace heaters and integralcomponentsTerminations asseparate comp
41、onentsEd. 6.0 (2011)(informative)Clause / Subclause title(normative)Group I and Group II Group III20 Supplementaryrequirements for plugs andsocketsExcluded Excluded Applies21 Supplementaryrequirements for luminairesExcluded Excluded Excluded22 Supplementaryrequirements for caplightsand handlightsExc
42、luded Excluded Excluded23 Equipment incorporatingcells and batteriesExcluded Excluded Applies24 Documentation Applies Applies Applies25 Compliance of prototype orsample with documentsApplies Applies Applies26.1 General Applies Applies Applies26.2 Test configuration Applies Applies. Applies26.3 Tests
43、 in explosive testmixturesExcluded Excluded Applies26.4 Tests of enclosures Excluded Excluded Applies26.4.1 Order of tests Excluded Excluded Applies26.4.1.1 Metallic enclosures,metallic parts of enclosuresand glass parts ofenclosuresExcluded Excluded Applies26.4.1.2 Non-metallic enclosures ornon-met
44、allic parts ofenclosuresExcluded Excluded Applies26.4.2 Resistance to impact Replaced by 5.1.5 Replaced by 5.1.5 Applies26.4.3 Drop test Excluded Excluded Excluded26.4.4 Acceptance criteria Replaced by 5.1.5 Replaced by 5.1.5 Applies26.4.5 Degree of protection byenclosureReplaced by 5.1.8and/or 5.1.
45、9Replaced by 5.1.8and/or 5.1.9Applies26.5 Thermal tests Modified. Modified Applies26.5.1 Temperature measurement Replaced by 5.1.13 Replaced by 5.1.13 Applies26.5.2 Thermal shock test Excluded Excluded Applies26.5.3 Small component ignitiontestExcluded Excluded Applies26.6 Torque test for bushings E
46、xcluded Excluded Applies26.7 Non-metallic enclosures ornon-metallic parts ofenclosuresExcluded Excluded Applies26.8 Thermal endurance to heat Replaced by 5.1.11 Replaced by 5.1.11 Applies26.9 Thermal endurance to cold Replaced by 5.1.7 Replaced by 5.1.7 Applies26.10 Resistance to light Replaced by 5
47、.1.16 fortrace heaters andintegral componentsspecified for outdoorexposureReplaced by 5.1.16 fortrace heaters andintegral componentsspecified for outdoorexposureApplies26.11 Resistance to chemicalagents for Group I electricalequipmentApplies for Group I Excluded AppliesMAY 5, 2017 NATIONAL DIFFERENC
48、ES FOR UL 60079-30-1 7Table 1 Application or exclusion of specific clauses of IEC 60079-0 UL 60079-0 Continued on NextPageUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULTable 1 Application or exclusion of specific clauses of IEC 60079-0 UL 60
49、079-0 (Continued)IEC UL 60079-0 Electrical resistance trace heaters and integralcomponentsTerminations asseparate componentsEd. 6.0 (2011)(informative)Clause / Subclause title(normative)Group I and Group II Group III26.12 Earth continuity Excluded Excluded Applies26.13 Surface resistance test ofparts of enclosures ofnon-metallic materialsExcluded Excluded Applies26.14 Measurement ofcapacitanceExcluded Excluded Applies26.15 Verification of ratings ofventilating fansExcluded Excluded Excluded26.16 Alternative qualification ofelastomeric sealing O-
