1、UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULNational Differences ForUL 60974-1Standard for Arc Welding Equipment; Part 1: Welding Power SourcesUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSIO
2、N FROM ULNational Differences ForUL 60974-1Standard for Arc Welding Equipment; Part 1: Welding Power SourcesEdition: 1Edition Date: March 17, 2005Revision pages have been issued to delete the ANSI approval information from the titlepage.This document provides a single listing of the National Differe
3、nces included in the UL adoption ofthe corresponding IEC 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 pr
4、ovides this standards document as is without warranty 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,incl
5、uding loss of profits, lost savings, loss of data, or 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 excee
6、d the pricepaid for this standards document, regardless 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)
7、 resulting from any error or deviation introduced while purchaser is storing an electronicStandard on the purchasers computer system.Copyright 2015 Underwriters Laboratories Inc.SEPTEMBER 28, 2015NATIONAL DIFFERENCES FOR UL UL 60974-12UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION O
8、RDISTRIBUTION WITHOUT PERMISSION FROM ULPrefaceThis document 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 t
9、ypes are additionally noted in this document. The standard may 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 ba
10、sed on safety practices. These are deviations for IEC requirements 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 particularc
11、omponent standard is harmonized with the IEC component standard.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. Typica
12、lly one of thefollowing words is used to explain how the text 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 bas
13、e IEC text.Deletion / Delete - A deletion entails complete deletion 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 theaddition, replacement or deletion of certain
14、 words or the replacement of an entire clause,subclause, table, figure, or annex of the base IEC text.SEPTEMBER 28, 2015 NATIONAL DIFFERENCES FOR UL UL 60974-1 3UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULNational Differences2DV.1 D2 Modif
15、ication of 2 by deleting the following text:IEC 60085:1984,Thermal evaluation and classification of electrical insulation2DV.2 D2 Modification of 2 by adding the following text:IEC 62114Electrical Insulation Systems (EIS) Thermal ClassificationUL 62Flexible Cord and Fixture WireUL 94Test for Flammab
16、ility of Plastic Materials for Parts in Devices and AppliancesUL 486BWire Connectors for Use With Aluminum ConductorsUL 489Molded-Case Circuit Breakers, Molded-Case Switches, and Circuit-Breaker EnclosuresUL 498Attachment Plugs and ReceptaclesUL 551Transformer-Type Arc-Welding MachinesUL 558Industri
17、al Trucks, Internal Combustion Engine-PoweredUL 969Marking and Labeling SystemsUL 1059Terminal BlocksUL 1248Engine-Generator Assemblies for Use in Recreational VehiclesUL 1659Attachment Plug Blades for Use in Cord Sets and Power-Supply CordsUL 1682Plugs, Receptacles, and Cable Connectors of the Pin
18、and Sleeve TypeSEPTEMBER 28, 2015NATIONAL DIFFERENCES FOR UL UL 60974-14UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULUL 2200Stationary Engine Generator Assemblies5.1DV D2 Modification by replacing the third paragraph in 5.1 with the followi
19、ng:As a condition of conformity, the TYPE TESTS given below shall be carried out in the followingsequence with no drying time between j), k), and l):a) GENERAL VISUAL INSPECTION, see 3.7;b) insulation resistance, see 6.1.3 (preliminary check);c) thermal requirements, see clause 7;d) dielectric stren
20、gth, see 6.1.4;e) THERMAL PROTECTION, see clause 9;f) enclosure, see 14.1;g) impact resistance, see 14.2;h) handling means, see 14.3;i) drop withstand, see 14.4;j) protection provided by the enclosure, see 6.2.1;k) insulation resistance, see 6.1.3;l) dielectric strength, see 6.1.4;m) GENERAL VISUAL
21、INSPECTION, see 3.7.6.3.1DV DC Modification of 6.3.1 by adding the following text:Insulation classes above Class 105 shall be evaluated with respect to the requirements inthe Standard for Electrical Insulation Systems (EIS) Thermal Classification, IEC 62114.6.3.2DV DC Modification of 6.3.2 by adding
22、 the following text:Insulation classes above Class 105 shall be evaluated with respect to the requirements inthe Standard for Electrical Insulation Systems (EIS) Thermal Classification, IEC 62114.6.3.5DV D1 Modification by replacing 6.3.5 with the following:Plasma tips, which can not be protected ag
23、ainst direct contact, shall be consideredsufficiently protected under normal and single fault conditions when the followingcircumstances occur:a) When the voltage between the plasma tip and the workpiece and/or earth isnot higher than SELV with no arc current present; andSEPTEMBER 28, 2015 NATIONAL
24、DIFFERENCES FOR UL UL 60974-1 5UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULb) For manual systems, when an arc current is present:1) In accordance with IEC 60529, the sides of the plasma tip shall not bein contact with the test finger when
25、it is placed on a flat surface with itscenter line perpendicular to it; or2) The d.c. voltage between the plasma tip and the workpiece and/or earthshall not be higher than SELV when the plasma tip is placed at thedistance recommended by the manufacturer during the cutting andgouging, from a flat sur
26、face with the centerline perpendicular to thesurface.When the voltages of (a) or (b)(2) are exceeded, the voltages shall be reduced as specifiedin Section 13.NOTE An example of a fault is an abnormal condition resulting from the electrode being in contact withthe plasma tip. A fault can occur due to
27、 missing insulators, the plasma tip sticking to the electrode,conductive material between the plasma tip and electrode, wrong parts, loose parts, electrode abrasion,parts inserted incorrectly, excessive duty cycle (duty factor), excessive current or incorrect gas flow.7DV D2 Modification of 7 by add
28、ing the following item:f) for fuel systems and engine compartment components, in accordance with19.1.1 of the Standard for Industrial Trucks, Internal Combustion Engine-Powered,UL 558.7.3.1DV D2 Modification to Note 3 in Table 6:Replace IEC 60085 with IEC 62114.10.1DV DC Modification of 10.1 by addi
29、ng the following text:Fuel and exhaust systems for mechanically driven, engine powered rotating welding powersources shall be evaluated as follows:a) Fuel systems shall be evaluated with respect to Clause 6 in the Standard forEngine-Generator Assemblies for Use in Recreational Vehicles, UL 1248.b) E
30、xhaust systems shall be evaluated to Clause 36 in the Standard forStationary Engine Generator Assemblies, UL 2200.10.4DV DC Modification of 10.4 by adding the following text:Input supply terminals shall be evaluated with respect to the requirements in the Standardfor Terminal Blocks, UL 1059 or the
31、Standard for Wire Connectors for Use with AluminumConductors, UL 486B, as applicable.SEPTEMBER 28, 2015NATIONAL DIFFERENCES FOR UL UL 60974-16UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM UL10.4.2DV D2 Modification of 10.4.2 by adding the foll
32、owing text:A wire connector or terminal intended solely for the connection of an equipment-grounding conductor shall be plainly marked, such as “G,” “GR,” “GND,” “Ground,”“Grounding,” or the like, or by a wiring diagram provided on the product. The wireconnector or terminal shall be located so that
33、it is unlikely to be removed during normalservicing of the product.10.7DV DC Modification of 10.7 by adding the following text:Circuit breakers shall be evaluated with respect to the requirements in the Standard forMolded-Case Circuit Breakers, Molded-Case Switches, and Circuit-Breaker Enclosures, U
34、L489.10.8DV DC Modification of 10.8 by adding the following text:Supply cables shall be evaluated with respect to the requirements in the Standard forFlexible Cord and Fixture Wire, UL 62.10.9DV DC Modification of 10.9 by adding the following text:Attachment plugs shall be evaluated with respect to
35、the requirements in the Standard forAttachment Plugs and Receptacles, UL 498, the Standard for Attachment Plug Blades forUse in Cord Sets and Power-Supply Cords, UL 1659, and the Standard for Plugs,Receptacles, and Cable Connectors of the Pin and Sleeve Type, UL 1682.14.1DV DC Modification of 14.1 b
36、y adding the following text:Nonmetallic enclosures shall be investigated to the requirements in the 20 mm VerticalBurning Test; V-0, V-1, or V-2 in the Standard for Test for Flammability of Plastic Materialsfor Parts in Devices and Appliances, UL 94.14.5DV D2 Modification of 14.5:In the first paragr
37、aph, replace 10 with 15.15DV D2 Modification to 15 by adding the following text:Tests to determine the legibility and durability of markings are stated in the Standard forMarking and Labeling Systems, UL 969.17.1DV D2 Modification of 17.1 by adding the following text:Additional requirements for inst
38、ructions are stated in the Standard for Transformer-TypeArc-Welding Machines, UL 551.17.2DV.1 D2 Modification of 17.2 by adding the following text:Additional marking requirements are stated in the Standard for Transformer-TypeArc-Welding Machines, UL 551.SEPTEMBER 28, 2015 NATIONAL DIFFERENCES FOR U
39、L UL 60974-1 7UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM UL17.2DV.2 D2 Modification of 17.2 by adding the following text:Tests to determine the legibility and durability of markings are stated in the Standard forMarking and Labeling Systems
40、, UL 969.17.2DV.3 D2 Modification of 17.2 by adding 17.2DV.3.1 and 17.2DV.3.2:17.2DV.3.1 Power sources with ac output receptacles shall be plainly identified such as bybeing marked NEUTRAL FLOATING or NEUTRAL BONDED TO FRAME.17.2DV.3.2 Power sources with dc output receptacles shall be plainly identified such as bybeing marked SYSTEM FLOATING or SYSTEM BONDED TO FRAME.SEPTEMBER 28, 2015NATIONAL DIFFERENCES FOR UL UL 60974-18
