• UL 923 : 7

    Superseded A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.
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    MICROWAVE COOKING APPLIANCES

    Available format(s):  Hardcopy

    Superseded date:  12-24-2021

    Language(s): 

    Published date:  05-01-2013

    Publisher:  Underwriters Laboratories

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    Table of Contents - (Show below) - (Hide below)

    INTRODUCTION
    1. Scope
    2. Glossary
    3. General
    CONSTRUCTION
    4. General
    5. Frame and Enclosure
    6. Accessibility of Live Parts
    7. Protection Against Injury
    8. Mechanical Assembly
    9. Protection Against Corrosion
    10. Interlocks
    11. Interlock Monitors
    12. Polymeric Materials
    13. Supply Connections
    14. Live Parts
    15. Polarization
    16. Internal Wiring
    17. Heating Elements
    18. Electrical Insulation
    19. Thermal Insulation
    20. Motors
    21. Motor Overload Protection
    22. Short-Circuit and Ground-Fault Protection
    23. Thermostats
    24. Thermal Cutoffs
    25. Attachment-Plug Receptacles
    26. Lampholders
    27. Switches and Controls
    28. Filters
    29. Spacings
    30. Grounding
    31. Secondary Circuits
    PERFORMANCE
    32. General
    33. Leakage Current Test
    34. Microwave Radiation Emission Test
    35. Power Input Test
    36. Temperature Test
    37. Surface Temperature Tests
    38. Insulation Resistance and Leakage Current Test as a
         Result of Moisture
    39. Dielectric Voltage-Withstand Test
    40. Door Assembly Tests
    41. Glass Control Panel Test
    42. Interlock System Endurance Test
    43. Interlock Monitor Circuit Test
    44. Mechanical Endurance Test
    45. Moisture Conditioning Test
    46. Spill Test
    47. Abnormal Operation Tests
    48. Abnormal Operation Tests on Motors Used with Solid-
         State Controls
    49 Abnormal Operation - Fire Isolation Test
    50. Magnetically Operated Interlock Test
    51. X-Radiation Test
    52. Temperature Control Tests
    53. Temperature Probe Test
    54. Motor Switch Test
    55. Interlock Malfunction Test
    56. Salt Spray Corrosion Test
    57. Cavity Fire Containment Test
    58. Strength of Mounting Test
    59. Tests on Motors Exposed to Grease or Cooking Vapors
    MANUFACTURING AND PRODUCTION-LINE TESTS
    60. Dielectric Voltage Withstand Test
    61. Grounding Continuity Test
    RATING
    62. Details
    MARKINGS
    63. General
    64. Visible After Installation
    65. Visible to the User During Use
    66. Visible During Installation and Examination
    67. Instruction Manuals
    68. Important Safety Instructions
    69. Warning Markings and Instructions Concerning Micro-
         wave and X-Radiation Emission
    70. Grounding Instructions
    SELF-CLEANING OVENS
    General
    71. Scope
    Construction
    72. Materials
    73. Oven Door Latch/Interlock Assembly
    74. Seals and Gaskets
    Performance
    75. General
    76. Temperature Test
    77. Latch-Solenoid Temperature Test
    78. Shorted Thermostat - Abnormal Test
    79. Oven-Door Latch Endurance Test
    80. Window Impact Tests
    Fire and Explosion
    81. General
    82. Test Electrodes
    83. Test Samples
    84. Installation of Test Sample
    85. Fire and Explosion Test Within Oven
    86. Emission of Carbon Monoxide
    87. Vent Gases and Vapors Test
    88. Vertical Cool-Air-Mixing Duct Test
    89. Self-Cleaning of Removable Companion Oven Panels
         Test
    90. Elevated Interlock Operating Temperature Tests
    Marking
    91. Details
    SUPPLEMENT SA - MICROWAVE COOKING APPLIANCES FOR MARINE
         USE
    GENERAL
    SA1. Scope
    CONSTRUCTION
    SA2. Mounting
    SA3. Corrosion
    SA4. Supply Connections
    SA5. Internal Wiring
    SA6. Electrical Connections
    PERFORMANCE
    SA7. General
    SA8. Vibration Test
    SA9. Shock Test
    SA10. Salt Spray Corrosion Test
    MARKINGS
    SA11. Visible After Installation
    SA12. Visible During Installation and Examination
    APPENDIX A
    Standards for Components

    Abstract - (Show below) - (Hide below)

    Describes household and commercial microwave cooking appliances operated in the Industrial, Scientific and Medical (ISM) bands of 915 +/-25 and 2450 +/-50 MHz, for use in ordinary locations in accordance with the National Electrical Code, NFPA 70, and rated not more than 600 V.

    General Product Information - (Show below) - (Hide below)

    Development Note NEW CHILD REV 8 2020 IS ADDED
    Document Type Standard
    Product Note NEW CHILD REV 8 2020 IS ADDED
    Publisher Underwriters Laboratories
    Status Superseded
    Superseded By
    Supersedes

    Standards Referenced By This Book - (Show below) - (Hide below)

    ASTM F 1360 : 2017 : REDLINE Standard Specification for Ovens, Microwave, Electric
    NFPA 96 : 2017 VENTILATION CONTROL AND FIRE PROTECTION OF COMMERCIAL COOKING OPERATIONS
    ICC 2009 INT. RESI.CODE & COMM.-I1 : 2009 2009 INTERNATIONAL RESIDENTIAL CODE & COMMENTARY - VOLUME 2: CHAPTERS 12 TO 44
    CSA 1.1 : 2016 HOUSEHOLD COOKING GAS APPLIANCES
    NFPA 1 : 2021 FIRE CODE
    ICC IRC CODE AND COMMENTARY VOLUME 2 : 2015 IRC® Code and Commentary, Volume 2
    UL 507 : 2010 ELECTRIC FANS
    ICC IMC Code and Commentary : 2015 IMC® Code and Commentary
    ICC 2012 INTERNATIONAL RESI. CODE : 2012 INTERNATIONAL RESIDENTIAL CODE FOR ONE- AND TWO-FAMILY DWELLINGS
    UL 858 : 2016 HOUSEHOLD ELECTRIC RANGES
    ANSI Z21.1 : 2016 HOUSEHOLD COOKING GAS APPLIANCES
    NFPA 1 HDBK : 2015 FIRE CODE HANDBOOK
    NFPA 1 : 2018 FIRE CODE
    ICC 2012 INTERNATIONAL MECH. CODE : 2012 INTERNATIONAL MECHANICAL CODE

    Standards Referencing This Book - (Show below) - (Hide below)

    UL 4248-1 : 1 FUSEHOLDERS - PART 1: GENERAL REQUIREMENTS
    UL 1441 : 4 COATED ELECTRICAL SLEEVING
    UL 4248-5 : 1 FUSEHOLDERS - PART 5: CLASS G
    UL 1030 : 8 SHEATHED HEATING ELEMENTS
    UL 60691 : 4 THERMAL-LINKS - REQUIREMENTS AND APPLICATION GUIDE
    UL 5085-3 : 1 LOW VOLTAGE TRANSFORMERS - PART 3: CLASS 2 AND CLASS 3 TRANSFORMERS
    UL 858 : 2016 HOUSEHOLD ELECTRIC RANGES
    UL 62 : 2014 FLEXIBLE CORDS AND CABLES
    UL 94 : 6 TESTS FOR FLAMMABILITY OF PLASTIC MATERIALS FOR PARTS IN DEVICES AND APPLIANCES
    UL 498 : 16ED 2017 ATTACHMENT PLUGS AND RECEPTACLES
    UL 61058-1 : 4 SWITCHES FOR APPLIANCES - PART 1: GENERAL REQUIREMENTS
    UL 4248-11 : 1 FUSEHOLDERS - PART 11: TYPE C (EDISON BASE) AND TYPE S PLUG FUSE
    UL 900:8ED 2015-04 Air Filter Units
    UL 83 : 2017 THERMOPLASTIC-INSULATED WIRES AND CABLES
    UL 746C : 6 POLYMERIC MATERIALS - USE IN ELECTRICAL EQUIPMENT EVALUATIONS
    UL 917 : 2006 CLOCK-OPERATED SWITCHES
    UL 4248-12 : 1 FUSEHOLDERS - PART 12: CLASS R
    UL 4248-9 : 1 FUSEHOLDERS - PART 9: CLASS K
    UL 969 : 5 MARKING AND LABELING SYSTEMS
    UL 5085-1 : 1 LOW VOLTAGE TRANSFORMERS - PART 1: GENERAL REQUIREMENTS
    UL 796 : 2011 PRINTED-WIRING BOARDS
    UL 510 : 9 POLYVINYL CHLORIDE, POLYETHYLENE AND RUBBER INSULATING TAPE
    UL 2111 : 1 OVERHEATING PROTECTION FOR MOTORS
    UL 224 : 6 EXTRUDED INSULATING TUBING
    UL 1054 : 7 SPECIAL-USE SWITCHES
    UL 244A : 3 SOLID-STATE CONTROLS FOR APPLIANCES
    UL 746A:6ED 2012-09 Polymeric Materials - Short Term Property Evaluations
    UL 60730-1 : 5ED 2016-08 AUTOMATIC ELECTRICAL CONTROLS - PART 1: GENERAL REQUIREMENTS
    UL 4248-6 : 1 FUSEHOLDERS - PART 6: CLASS H
    UL 817 : 2015 CORD SETS AND POWER-SUPPLY CORDS
    UL 4248-15 : 1 FUSEHOLDERS - PART 15: CLASS T
    UL 4248-4 : 1 FUSEHOLDERS - PART 4: CLASS CC
    UL 496 : 2017 LAMPHOLDERS
    UL 4248-8 : 1 FUSEHOLDERS - PART 8: CLASS J
    UL 486A-486B : 2 WIRE CONNECTORS
    UL 873 : 2012 TEMPERATURE-INDICATING AND REGULATING EQUIPMENT
    UL 44 : 2018 THERMOSET-INSULATED WIRES AND CABLES
    UL 746B : 4 POLYMERIC MATERIALS - LONG TERM PROPERTY EVALUATIONS
    UL 310 : 9 ELECTRICAL QUICK-CONNECT TERMINALS
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