UL 763-2018 UL Standard for Safety Motor-Operated Commercial Food Preparing Machines (Fifth Edition).pdf

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1、UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL UL 763 Motor-Operated Commercial Food Preparing Machines STANDARD FOR SAFETYUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM ULUL COPYRIGH

2、TED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL UL Standard for Safety for Motor-Operated Commercial Food Preparing Machines, UL 763 Fifth Edition, Dated February 28, 2018 Summary of Topics This new edition of ANSI/UL 763 includes the following changes

3、 in requirements: Wand-type mixers - requirements of appliances provided with an interlock system Electronic Media Instructions Revision of Clause B1.9 and Removal of Table B1.1 The requirements are substantially in accordance with Proposal(s) on this subject dated October 13, 2017 and November 17,

4、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 photocopying, recording, or otherwise without prior permission of UL. UL provides this Standard as is without warranty of any kind,

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6、ges 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 Standard, regardless of the form of the claim. Use

7、rs 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 deviation introduced while purchaser is storing an el

8、ectronic Standard on the purchasers computer system. FEBRUARY 28, 2018 UL 763 tr1UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL FEBRUARY 28, 2018 UL 763 tr2 No Text on This PageUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION

9、 OR DISTRIBUTION WITHOUT PERMISSION FROM UL FEBRUARY 28, 2018 1 UL 763 Standard for Motor-Operated Commercial Food Preparing Machines First Edition January, 1985 Second Edition October, 1993 Third Edition November, 2000 Fourth Edition January, 2012 Fifth Edition February 28, 2018 This ANSI/UL Standa

10、rd for Safety consists of the Fifth edition. The most recent designation of ANSI/UL 763 as an American National Standard (ANSI) occurred on February 28, 2018. ANSI approval for a standard does not include the Cover Page, Transmittal Pages, and Title Page. The Department of Defense (DoD) has adopted

11、UL 763 on October 3, 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

12、Collaborative Standards Development System (CSDS) at https:/. ULs Standards for Safety are copyrighted by UL. 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 s

13、ole and exclusive property of UL. COPYRIGHT 2018 UNDERWRITERS LABORATORIES INC. ANSI/UL 763-2018UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL FEBRUARY 28, 2018 MOTOR-OPERATED COMMERCIAL FOOD PREPARING MACHINES - UL 763 2 No Text on This Pa

14、geUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL CONTENTS INTRODUCTION 1 Scope .8 2 Terminology 8 3 Glossary .8 4 Units of Measurement 10 5 References10 CONSTRUCTION 6 Components 10 6.1 General 10 6.2 Attachment plugs, receptacles, connecto

15、rs, and terminals 11 6.3 Capacitors and lters 12 6.4 Controls 13 6.5 Cords, cables, and internal wiring .16 6.6 Cord reels 16 6.7 Field wiring boxes and raceways 16 6.8 Heating elements17 6.9 Lampholders, indicating lamps and lighting ballasts17 6.10 Motors 18 6.11 Motor overload protection .18 6.12

16、 Overcurrent protection 21 6.13 Polymeric materials and enclosures 22 6.14 Power supplies.22 6.15 Printed wiring boards .23 6.16 Semiconductors, relays and small electrical and electronic components.23 6.17 Solenoids and electrically operated valves.23 6.18 Supplemental insulation, insulating bushin

17、gs and assembly aids .24 6.19 Switches, timers and interlocks 24 6.20 Transformers 27 7 Field Attached Accessories .28 8 Frame and Enclosure 29 9 Mechanical Assembly 32 10 Protection Against Corrosion .33 11 Accessibility of Live Parts 35 12 Supply Connections .39 12.1 Cord-connected machines .39 12

18、.2 Permanently connected machines 43 13 Current-Carrying Parts 45 14 Insulating Material 45 15 Internal Wiring46 15.1 Mechanical protection 46 15.2 Splices and connections 47 16 Grounding .47 16.1 General .47 16.2 Grounding identication .49 17 Spacings 49 18 Alternate Spacings Clearances and Creepag

19、e Distances 51 19 Flooding of Live Parts .52 FEBRUARY 28, 2018 MOTOR-OPERATED COMMERCIAL FOOD PREPARING MACHINES - UL 763 3UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL 20 Air Filters 52 PROTECTION AGAINST INJURY TO PERSONS 21 General53 22

20、 Sharp Edges .53 23 Enclosures and Guards54 24 Materials.55 25 Rotating or Moving Members.55 26 Parts Subject to Pressure56 27 Pressure Relief Devices .57 28 Switches, Controls, and Interlocks 58 29 Liquid Mixing and Blending Machine 60 30 Blenders Provided with a Capacitive Touch-Screen .61 31 Wand

21、-type Mixers (Immersion Blenders).62 32 Stability63 PERFORMANCE 33 General63 34 Starting Current Test 64 35 Input Test64 36 Normal Temperature Test64 36.1 General .64 36.2 Meat saws and meat slicers .68 36.3 Meat choppers and meat grinders 68 36.4 Meat tenderizers .69 36.5 Ice crushers .69 36.6 Ice

22、dispensers .69 36.7 Liquid dispensers 69 36.8 Vegetable shredder-slicers 69 36.9 Bread slicers.70 36.10 Food mixers 70 36.11 Coffee grinders and coffee mills.71 36.12 Food cutters and food slicers .71 36.13 Food mixers-grinders 71 36.14 Food processors 71 36.15 Potato peelers 72 36.16 Churns.72 36.1

23、7 Dough rollers, molders, and dividers.72 36.18 Liquid mixers spindle type 72 36.19 Vegetable trimmers73 36.20 Blending mixers .73 36.21 Can openers .74 36.22 Wand-type mixers .74 36.23 Centrifugal juicers .74 36.24 Reamer (citrus) juicers .75 37 Dielectric Voltage-Withstand Test .75 38 Leakage Curr

24、ent Test .76 39 Leakage Current Following Humidity Conditioning Test 80 40 Overspeed Test 80 41 Flooding of Live Parts Tests .80 42 Wand-type Mixer Moisture Resistance Test 81 FEBRUARY 28, 2018 MOTOR-OPERATED COMMERCIAL FOOD PREPARING MACHINES - UL 763 4UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FUR

25、THER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL 43 Blender Cover Opening Splash Test 81 44 Test for Deterioration of Parts Subject to Flexing .82 45 Test for Parts Not Subject to Flexing 82 46 Insulation Resistance Test .83 47 Hydrostatic Pressure Test .83 48 Switch Overload Test .84 49

26、 Interlock System Endurance Test .85 50 Wiring Flexing Test .85 51 Strain Relief Test .86 52 Stability Test .86 53 Abnormal Operation Test 87 54 Abnormal Filter Blockage Test87 55 Water Spray Test .88 56 Adequacy of Mounting Test 91 57 Mold Stress-Relief Distortion Test.93 58 Permanence of Marking T

27、ests93 59 Accessory Installation Test.93 MANUFACTURING AND PRODUCTION-LINE TESTS 60 Dielectric Voltage-Withstand .94 61 Continuity Tests 96 61.1 Grounding .96 61.2 Polarization 96 61.3 Electrical indicating device.96 RATINGS 62 Details.96 MARKINGS 63 Details.97 63.1 General .97 63.2 Permanently conn

28、ected machines 98 63.3 Components .99 63.4 Cautionary marking .99 63.5 Attachment and accessory marking100 63.6 Specic machine markings .100 63.7 Machines in protected locations .101 64 Accessory Installation Instructions .101 65 Instructions .101 SUPPLEMENT SA - (Normative) EVALUATION OF ELECTRONIC

29、 CIRCUITS INTRODUCTION SA1 Scope SA1 SA2 General SA1 SA3 GlossarySA1 FEBRUARY 28, 2018 MOTOR-OPERATED COMMERCIAL FOOD PREPARING MACHINES - UL 763 5UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL CONSTRUCTION SA4 Components SA3 SA4.1 Capacito

30、rs .SA3 SA4.2 Isolation devices SA3 SA4.3 Printed wiring boards SA4 SA4.4 Switch mode power supplies .SA4 SA4.5 Temperature sensing, thermistor devices SA4 SA4.6 Transformers .SA5 SA5 Identication of Safety Critical Circuit Functions .SA5 SA5.1 General SA5 SA5.2 Protective Electronic Circuits (PEC)

31、.SA5 SA5.3 Operating circuits that mitigate a dangerous malfunction .SA6 SA6 Evaluation of the Different Types of Electronic Circuits .SA6 SA6.1 All types of circuits SA6 SA7 Circuits that provide Safety Critical Functions .SA6 PERFORMANCE SA8 General Conditions for the Tests SA7 SA8.1 Details .SA7

32、SA8.2 Intentionally weak parts SA7 SA8.3 Test results determined by overcurrent protection operation SA8 SA9 Low-Power Circuits SA9 SA10 Abnormal Operation and Fault Tests.SA10 SA10.1 General SA10 SA10.2 Determination of fault conditions SA10 SA10.3 Low-power circuit re tests .SA12 SA10.4 Transforme

33、r overload test SA12 SA10.5 Switch mode power supply overload test.SA12 SA11 Programmable Component Reduced Supply Voltage Test SA13 SA12 Electromagnetic Compatibility (EMC) Requirements Immunity .SA13 MANUFACTURING AND PRODUCTION LINE TESTING SA13 Function of Circuits SA15 SUPPLEMENT SB - THERMOELE

34、CTRIC COOLING (PELTIER EFFECT) SB1 Scope SB1 SB2 Thermoelectric System .SB1 SB3 Thermoelectric Cooling Appliances SB1 SB3.1 General SB1 SB3.2 Thermoelectric cooling appliances without fans .SB2 SB3.3 Thermoelectric cooling appliances with fans SB2 SB3.4 Thermoelectric circuits powered by other than

35、a Class 2 supply SB2 SB3.5 Dielectric voltage withstand 5000 volt test SB3 FEBRUARY 28, 2018 MOTOR-OPERATED COMMERCIAL FOOD PREPARING MACHINES - UL 763 6UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL APPENDIX A (Informative) Secondary Circu

36、its and the Level of Evaluation Required A1 General A1 A2 Class 2 Circuits A2 A3 Limited Voltage/Current Circuits .A3 A4 Limited Voltage Circuit Requirements A5 A5 Limited Energy Circuits .A6 A6 Limiting Impedance Circuits .A7 A7 Safety Extra-Low Voltage Circuits .A8 A8 Secondary Circuit Tests A9 A8

37、.1 General.A9 A8.2 Maximum voltage A9 A8.3 Maximum current test for inherently limited circuits.A9 A8.4 Maximum power (limited energy) test .A10 A8.5 Limited power point determination test A11 A8.6 Power dissipation test .A11 A8.7 Component failure A12 APPENDIX B (Normative) Rechargeable Battery-Pow

38、ered Appliances B1 General .B1 FEBRUARY 28, 2018 MOTOR-OPERATED COMMERCIAL FOOD PREPARING MACHINES - UL 763 7UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL INTRODUCTION 1 Scope 1.1 These requirements cover commercial motor-operated food-pre

39、paring machines intended for use in accordance with the National Electrical Code. 1.2 These requirements do not cover machines rated more than 600 V; nor do they cover machines involving universal motors rated more than 250 V. 1.3 These requirements cover coffee grinders, vegetable cutters, food mix

40、ers, nonrefrigerated ice cube dispensers, and other motor-operated machines usually found in commercial kitchens, restaurants, food processing establishments, bakeries, or other business establishments where food is prepared or processed. 1.4 A machine that utilizes some other source of energy, such

41、 as gas or steam, in addition to electric energy will be investigated under these requirements and under such additional requirements as are applicable to the machine under consideration. 1.5 These requirements also cover portable rechargeable battery-powered appliances for indoor or outdoor use wit

42、h rechargeable non-user and user-replaceable batteries; see Appendix B. 2 Terminology 2.1 In the following text, a requirement that applies only to a specic type or types of commercial food-preparing machine is identied by a specic reference in the requirement to the type or types of machine involve

43、d. Absence of such a specic reference or use of the term machine indicates that the requirement applies to all of the types of equipment covered by this standard. 3 Glossary 3.1 For the purpose of this standard the following denitions apply. 3.2 APPLIANCE COUPLER A single-outlet, female contact devi

44、ce for attachment to a exible cord as part of a detachable power-supply cord to be connected to an appliance inlet (motor attachment plug). 3.3 APPLIANCE INLET (Motor Attachment Plug) A male contact device mounted on an end product appliance to provide an integral blade conguration for the connectio

45、n of an appliance coupler or cord connector. 3.4 APPLIANCE (FLATIRON) PLUG An appliance coupler type of device having a cord guard and a slot conguration specied for use with heating or cooking appliances. 3.5 ATTENDED EQUIPMENT Equipment intended for use where operator presence is required for the

46、equipment to function but is not necessarily required for the equipment to operate. Operator absence is effectively limited to short durations due to one or more characteristics of the equipment such as production of excessive noise or vibration. Examples may include hand-held mixers, meat saws, mea

47、t slicers, food processors, and blenders. FEBRUARY 28, 2018 MOTOR-OPERATED COMMERCIAL FOOD PREPARING MACHINES - UL 763 8UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL 3.6 AUTOMATICALLY CONTROLLED MACHINE A machine is considered to be automa

48、tically controlled under any one or more of the following conditions if: a) The repeated starting of the machine, beyond one complete predetermined cycle of operation to the point where some form of limit switch opens the circuit, is independent of any manual control. b) During any single predetermi

49、ned cycle of operation, the motor is caused to stop and restart one or more times. c) Upon energizing the machine, the initial starting of the motor may be intentionally delayed beyond normal, conventional starting. d) During any single predetermined cycle of operation, automatic changing of the mechanical load may reduce the motor speed sufficiently to reestablish starting-winding connections to the supply circuit. 3.7 COMPONENT A device or fabricated part of the appliance covered by the scope o