ANSI UL 749-2017 UL Standard for Safety Household Dishwashers (Tenth Edition).pdf

1、UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL UL 749 Household Dishwashers STANDARD FOR SAFETYUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM ULUL COPYRIGHTED MATERIAL NOT AUTHORIZED

2、FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL UL Standard for Safety for Household Dishwashers, UL 749 Tenth Edition, Dated March 16, 2017 Summary of Topics This new edition of ANSI/UL 749 is being issued to incorporate several substantive changes. The new and revised requireme

3、nts are substantially in accordance with Proposal(s) on this subject dated November 20, 2015, October 7, 2016, and January 19, 2017. 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 photo

4、copying, recording, or otherwise without prior permission of UL. UL provides this 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,

5、 incidental, consequential, indirect or similar damages, including loss of prots, 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

6、event shall ULs liability for any damage ever exceed the price paid for this Standard, 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 j

7、udgment (including reasonable attorneys fees) resulting from any error or deviation introduced while purchaser is storing an electronic Standard on the purchasers computer system. MARCH 16, 2017 UL 749 tr1UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISS

8、ION FROM UL MARCH 16, 2017 UL 749 tr2 No Text on This PageUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL Canadian Standards Association CSA-C22.2 No. 167-17 Seventh Edition Underwriters Laboratories Inc. UL 749 Tenth Edition Household Dishw

9、ashers March 16, 2017 ANSI/UL 749-2017UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL Commitment for Amendments This standard is issued jointly by the Canadian Standards Association (operating as “CSA Group”) and Underwriters Laboratories In

10、c. (UL). Comments or proposals for revisions on any part of the standard may be submitted to CSA Group or UL at any time. Revisions to this standard will be made only after processing according to the standards development procedures of CSA Group and UL. CSA Group and UL will issue revisions to this

11、 standard by means of a new edition or revised or additional pages bearing their date of issue. ISBN 978-1-4883-0252-7 2017 CSA Group All rights reserved. No part of this publication may be reproduced in any form whatsoever without the prior permission of the publisher. This Standard is subject to p

12、eriodic review, and suggestions for its improvement will be referred to the appropriate committee. To submit a proposal for change, please send the following information to inquiriescsagroup.org and include “Proposal for change” in the subject line: Standard desgination (number); relevant clause, ta

13、ble, and/or gure number; wording of the proposed change; and rationale for the change. To purchase CSA Group Standards and related publications, visit CSA Groups Online Store at shop.csa.ca or call toll-free 1-800-463-6727 or 416-747-4044. Copyright 2017 Underwriters Laboratories Inc. This ANSI/UL S

14、tandard for Safety consists of the Tenth edition. The most recent designation of ANSI/UL 749 as an American National Standard (ANSI) occurred on March 16, 2017. ANSI approval for a standard does not include the Cover Page, Transmittal Pages and Title Page. The Department of Defense (DoD) has adopted

15、 UL 749 on August 2, 1994. The publication of revised pages or a new edition of this Standard will not invalidate the DoD adoption. 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

16、Collaborative Standards Development System (CSDS) at https:/. To purchase UL Standards, visit m-, or call them at 1-888-UL33503 or 1-888-853-3503.UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL CONTENTS Preface .8 1 Scope .9 2 Reference Publ

17、ications 9 3 Denitions 20 4 General Requirements23 5 General Conditions for the Tests 24 5.1 Voltage and frequency .24 5.2 Cheesecloth for heating and abnormal tests 25 5.3 Test temperature 25 5.4 Thermocouples .25 5.5 Dishwashing detergent .25 5.6 Rinse agent 26 5.7 Place setting 26 5.8 High-sudsin

18、g detergent 26 5.9 Water temperature.26 6 Classication .26 7 Marking.26 7.1 General 26 7.2 Appliance markings 28 8 Instructions31 8.1 General 31 8.2 Instructions pertaining to a risk of re, electric shock, or injury to persons 32 8.3 Installation instructions .34 8.4 Operating instructions 35 8.5 Us

19、er-maintenance instructions 36 9 Protection Against Accessibility to Current-Carrying Parts.36 9.1 General 36 9.2 Enclosures for other than built-in appliances 36 9.3 Enclosures for built-in appliances38 9.4 All dishwashers .38 10 Starting of Motor-Operated Appliances 38 11 Power Input and Current.3

20、9 12 Heating .39 13 Leakage Current40 14 Insulation Resistance40 15 Moisture Resistance 41 15.1 General .41 15.2 Humidity conditioning .42 15.3 Liquid overowing from an auxiliary reservoir 42 15.4 Oversudsing .43 15.5 Liquid spillage all appliances .43 15.6 Liquid spillage portable appliances44 15.7

21、 Wetting of electrical components .45 15.8 Rain test 46 15.9 Hose rupture test.47 15.10 Liquid leaking from an auxiliary reservoir .48 16 Electric Strength 49 17 Abnormal Operation.49 17.1 Burnout test on components .49 MARCH 16, 2017 CSA-C22.2 NO. 167-17 UL 749 3UL COPYRIGHTED MATERIAL NOT AUTHORIZ

22、ED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL 17.2 Stopped timer50 17.3 Cord reels .51 17.4 Nichrome wire test .52 18 Stability and Mechanical Hazards .54 18.1 General .54 18.2 Stability .54 18.3 Sharp edges .54 18.4 Automatic restarting of the motor .55 18.5 Moving parts.55

23、 18.6 Guards, interlocks, and the like 56 18.7 Unintentional operation .56 19 Mechanical Strength 57 19.1 General .57 19.2 Frame and enclosure .57 20 Construction .58 20.1 Current-carrying parts.58 20.2 Bottom openings .59 20.3 Electrical insulation .61 20.4 Sound and thermal insulation 62 20.5 Plum

24、bing requirements62 21 Internal Wiring62 21.1 General .62 21.2 Splices and connections 64 21.3 Separation of circuits .65 21.4 Barriers .65 21.5 Endurance test.66 22 Components .66 22.1 General .66 22.2 Mechanical assembly .68 22.3 Capacitors.68 22.4 Field-attached or optional accessories 69 22.5 He

25、ating elements 70 22.6 Lampholders.71 22.7 Motors 71 22.8 Receptacles .72 22.9 Seals and diaphragms 72 22.10 Switches .73 22.11 Controls74 22.12 Connecting hoses .78 22.13 Transformers and power supplies .79 22.14 Overcurrent protection .79 22.15 Electrically operated valves.79 22.16 Terminals and c

26、onnectors 79 22.17 Pumps .80 22.18 Insulating devices .80 22.19 Adhesives used to secure parts .80 22.20 Equipment protective devices .81 23 Supply Connection and External Flexible Cords 81 23.1 Permanently connected appliances .81 23.2 Cord-connected appliances 82 23.3 Push-back relief 84 23.4 Stra

27、in relief 85 23.5 Cord reels .85 MARCH 16, 2017 CSA-C22.2 NO. 167-17 UL 749 4UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL 23.6 Power-supply cord kits for use with undercounter or built-in dishwashers86 23.7 Bushings 86 24 Terminals for Ex

28、ternal Conductors 86 25 Provision for Grounding .87 25.1 General .87 25.2 Bonding means 89 25.3 Continuity of grounding circuit90 25.4 Grounding terminals and leads.90 25.5 Heater sheaths 91 26 Screws and Connections 92 27 Creepage Distances, Clearances, and Distances through Insulation 92 28 Altern

29、ative Spacings-Clearances and Creepage Distances.93 29 Resistance to Corrosion .94 29.1 General .94 29.2 Liquid containers .94 29.3 Outdoor use dishwashers (protected locations and outdoor locations) 95 29.4 Metallic coating thickness test .97 30 Resistance to Heat, Fire, and Cracking Polymeric Mate

30、rials 97 30.1 General .97 30.2 Horizontal burning rate 98 30.3 Flammability .98 30.4 Enclosure ammability large mass consideration 100 30.5 Impact test .101 30.6 Cold impact 101 30.7 Mould stress relief.101 30.8 Immersion 102 30.9 Thermal ageing .102 30.10 Long-term exposure 103 30.11 Endurance 104

31、30.12 Tensile strength104 30.13 Tensile impact energy 105 30.14 Seal and gasket tests for outdoor use appliances 105 30.15 Ultraviolet light exposure 106 30.16 Water exposure and immersion 106 31 Manufacturing and Production Tests .106 31.1 Grounding continuity test .106 31.2 Electric strength test

32、.107 TABLES .108 FIGURES 114 SUPPLEMENT SA - Plumbing Requirements for Household Dishwashers (Normative) SA1 Scope 127 SA2 Glossary 127 SA3 General Requirements 127 SA4 Test Procedures .128 SA4.1 General 128 SA4.2 Initial cycle128 SA4.3 Preparation and test .129 MARCH 16, 2017 CSA-C22.2 NO. 167-17 U

33、L 749 5UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL SUPPLEMENT SB - Safety of Smart Enabled Dishwashers SB1 Scope 131 SB2 General .131 SB2.1 Controls 131 SB2.2 Separation of circuits.132 SB2.3 Communication and display devices .133 SB2.4

34、Communication conductors and cables 133 SB2.5 Communication connectors .133 SB2.6 Smart enabled or remote operation 134 SB3 Functional Safety 134 SB4 Resistance to Electro Magnetic Phenomena (Immunity).135 SB5 Markings and Instructions .136 SUPPLEMENT SC - Ozone Generating Dishwashers SC1 Scope 137

35、SC2 General .137 SC2.1 Ozone test137 SC2.2 Equipment specications .138 SC2.3 Test conditions 138 SC3 Marking and Instructions 138 SC4 Polymeric Materials Exposed to Ozone .138 SC5 Seals and Diaphragms .139 SC6 Protection Against Injury to Persons139 SUPPLEMENT SD - ALTERNATIVE ELECTRONIC CIRCUIT REQ

36、UIREMENTS SD1 Scope 141 SD2 General .141 SD3 Glossary 142 SD4 Creepage Distances, Clearances, and Distances Through Insulation .143 SD5 Control Functions 143 SD5.1 Protective electronic circuits/controls .143 SD5.2 Operating controls or circuits that perform safety critical functions 144 SD6 Evaluat

37、ion of the Different Types of Control Circuits 144 SD6.1 All types of circuits.144 SD7 Protective Electronic Circuits 144 SD8 Operating Controls or Circuits that Perform Safety Critical Functions 145 SD9 General Conditions for the Tests.146 SD9.1 Details .146 SD9.2 Intentionally weak parts 146 SD9.3

38、 Test results determined by overcurrent protection operation 147 SD10 Low-Power Circuits .147 SD10.1 Low-power circuit determination 147 SD10.2 Low-power circuit re tests 149 SD11 Abnormal Operation and Fault Tests 149 SD12 Programmable Component Reduced Supply Voltage Test .151 SD13 Electromagnetic

39、 Compatibility (EMC) Requirements Immunity 151 MARCH 16, 2017 CSA-C22.2 NO. 167-17 UL 749 6UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL SD14 Manufacturing and Production Line Testing 153 SD15 Markings.153 Annex A (informative) Translation

40、s A1 French Translations154 MARCH 16, 2017 CSA-C22.2 NO. 167-17 UL 749 7UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL Preface This is the harmonized CSA Group and UL Standard for Household Dishwashers. It is the seventh edition of CAN/CSA-

41、C22.2 No. 167, and the tenth edition of UL 749. This edition of CSA C22.2 No. 167 supersedes the previous edition published in 2013. This edition of UL 749 supersedes the previous edition published in 2013. The major differences between this edition and the previous edition include the addition of r

42、equirements for DC Electric Test Voltages, Smart Enabled Appliances, Dishwasher Ignition Containment, Ozone Generating Dishwashers, Dishwasher Rinse Agent Exposure, Plumbing for Household Dishwashers, Dishwasher Heating Element Test and Nichrome Wire Test. This harmonized Standard was prepared by CS

43、A Group and Underwriters Laboratories Inc. (UL). The efforts and support of the Technical Harmonization Committee for Household Dishwashers and the Association of Home Appliance Manufactures (AHAM) are gratefully acknowledged. This Standard is considered suitable for use for conformity assessment wi

44、thin the stated scope of the Standard. This Standard was reviewed by the CSA Subcommittee on Household Dishwashers, under the jurisdiction of the Technical Committee on Consumer and Commercial Products and the CSA Strategic Steering Committee on Requirements for Electrical Safety, and has been forma

45、lly approved by the CSA Technical Committee. This standard has been approved by the American National Standards Institute (ANSI) as an American National Standard. Application of Standard Where reference is made to a specic number of samples to be tested, the specied number shall be considered a mini

46、mum quantity. 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 users of the standard to judge its suitability for their particular purpose. Level of harmonization This standard is published as a

47、n identical standard for CSA Group and UL. An identical standard is a standard that is exactly the same in technical content except for national differences resulting from conicts in codes and governmental regulations. Presentation is word for word except for editorial changes. Interpretations The i

48、nterpretation by the standards development organization of an identical or equivalent standard is based on the literal text to determine compliance with the standard in accordance with the procedural rules of the standards development organization. If more than one interpretation of the literal text

49、 has been identied, a revision is to be proposed as soon as possible to each of the standards development organizations to more accurately reect the intent. MARCH 16, 2017 CSA-C22.2 NO. 167-17 UL 749 8UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL Household dishwashers 1 Scope 1.1 This Standard applies to electric household dishwashers intended to be used in nonhazardous locations in accordance with the Canadian Electrical Code (