1、UL 73ISBN 1-55989-273-0Motor-Operated AppliancesNovember 9, 1998 UL 73 tr1Underwriters Laboratories Inc. (UL)333 Pfingsten RoadNorthbrook, IL 60062-2096UL Standard for SafetyforMotor-Operated Appliances, UL 73Eighth Edition, Dated April 16, 1993Revisions: This Standard contains revisions through and
2、 including November 9, 1998.A change is indicated by a note following the affected item. The note is preceded and followed by an asterisk.The revisions dated November 9, 1998 include a reprinted title page (page 1) for this Standard.The revisions dated November 9, 1998 were issued to make editorial
3、changes.As indicated on the title page (page 1), this UL Standard for Safety is an American National Standard. Attention isdirected to the note on the title page of this Standard outlining the procedures to be followed to retain the approved textof this ANSI/UL Standard.As indicated on the title pag
4、e (page 1), this UL Standard for Safety has been adopted by the Department of Defense.The master for this Standard at ULs Northbrook Office is the official document insofar as it relates to a UL service andthe compliance of a product with respect to the requirements for that product and service, or
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7、pying, recording, or otherwise without prior permission of UL.Revisions of UL Standards for Safety are issued from time to time. A UL Standard for Safety is current only if itincorporates the most recently adopted revisions.UL provides this Standard as is without warranty of any kind, either express
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9、ut of the use of or the inability to use this Standard, evenif UL or an authorized UL representative has been advised of the possibility of such damage. In no event shall ULsliability for any damage ever exceed the price paid for this Standard, regardless of the form of the claim.tr2 November 9, 199
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19、ng future effective dates as indicated in the note following the affected item. The priortext for requirements that have been revised and that have a future effective date are located after the Standard, andare preceded by a SUPERSEDED REQUIREMENTS notice.New product submittals made prior to a speci
20、fied future effective date will be judged under all of the requirements inthis Standard including those requirements with a specified future effective date, unless the applicant specificallyrequests that the product be judged under the current requirements. However, if the applicant elects this opti
21、on, it shouldbe noted that compliance with all the requirements in this Standard will be required as a condition of continued Listing,Recognition, and Follow-Up Services after the effective date, and understanding of this should be signified in writing.Copyright 1998 Underwriters Laboratories Inc. N
22、ovember 9, 1998 UL 73 tr3This Standard consists of pages dated as shown in the following checklist:Page Datetr1 tr4 . November 9, 19981 . April 16, 1993 (Reprinted: November 9, 1998)2 . July 2, 19983 . January 18, 19964 . April 16, 19935 . November 9, 19986 . April 19, 19937, 8 . April 16, 19939, 10
23、 . July 2, 199811 15 . April 16, 199316, 17 . July 2, 199818 . April 19, 199318A, 18B . July 2, 199819 22 . April 16, 199323, 24, 24A, 24B . April 19, 199325 . January 18, 199626 . April 16, 199327, 28 . November 9, 199829 . April 16, 199330 32 . April 19, 199333 38 . April 16, 199339 . January 18,
24、199640 . April 16, 199341, 42 . July 2, 199843 47 . April 16, 199348, 48A, 48B . January 18, 199649 56 . April 16, 199357 60 . April 19, 1993A1, A2 . July 2, 1998tr4 November 9, 1998 UL 73No Text on This PageAPRIL 16, 1993 ANSI/UL 73-1998(Title Page Reprinted: November 9, 1998)1UL 73Standard forMoto
25、r-Operated AppliancesFirst Edition April, 1937Second Edition April, 1958Third Edition December, 1960Fourth Edition February, 1967Fifth Edition January, 1972Sixth Edition August, 1978Seventh Edition September, 1986Eighth EditionApril 16, 1993Approval as an American National Standard (ANSI) covers the
26、 numbered paragraphson pages dated April 16, 1993 and January 18, 1996. These pages should not bediscarded when revised or additional pages are issued if it is desired to retain theANSI approved text.An effective date included as a note immediately following certain requirements is oneestablished by
27、 Underwriters Laboratories Inc.Approved as ANSI C33.36-1972, January 20, 1972Approved as ANSI/UL 73-1980, March 14, 1980Approved as ANSI/UL 73-1985, April 19, 1985Approved as ANSI/UL 73-1992, March 20, 1992Approved as ANSI/UL 73-1998, July 16, 1998The Department of Defense (DoD) has adopted UL 73 on
28、 May 11, 1976. Thepublication of revised pages or a new edition of this standard will not invalidate theDoD adoption.Revisions of this standard will be made by issuing revised or additional pages bearingtheir date of issue. A UL Standard is current only if it incorporates the most recentlyadopted re
29、visions, all of which are itemized on the transmittal notice thataccompanies the latest set of revised requirements.ISBN 1-55989-273-0COPYRIGHT 1978, 1998 UNDERWRITERS LABORATORIES INC.2 MOTOR-OPERATED APPLIANCES UL 73 JULY 2, 1998CONTENTSFOREWORDINTRODUCTION1 Scope . 52 Glossary . 53 Components . 6
30、4 Units of Measurement . 65 References . 6CONSTRUCTION6 General . 67 Frame and Enclosure . 68 Adhesives Used to Secure Parts . 109 Mechanical Assembly . 1010 Protection Against Corrosion . 1111 Accessibility of Uninsulated Live Parts and Film-Coated Wire . 1212 Supply Connections . 1713 Current-Carr
31、ying Parts . 2214 Insulating Material . 2215 Internal Wiring . 2316 Separation of Circuits . 2417 Capacitors . 24A18 Grounding . 2519 Heating Elements . 2620 Lampholders . 2721 Motors . 2722 Overload- or Thermal-Protective Devices . 2923 Receptacles . 3024 Switches and Controls . 3025 Spacings . 31P
32、ROTECTION AGAINST INJURY TO PERSONS26 General . 3327 Sharp Edges . 3328 Enclosures and Guards . 3329 Materials . 3530 Rotating or Moving Members . 3531 Parts Subject to Pressure . 3532 Pressure-Relief Devices . 3633 Switches, Controls, and Interlocks . 3734 Specific Appliances . 3835 Stability . 383
33、6 Marking . 39JANUARY 18, 1996 MOTOR-OPERATED APPLIANCES UL 73 3PERFORMANCE37 Leakage Current Test . 4038 Leakage Current Test Following Humidity Conditioning . 4239 Starting Current Test . 4240 Input Test . 4241 Temperature Tests . 4342 Surface Temperature Tests . 4843 Dielectric Voltage-Withstand Test .
