UL 73
Standard for Motor-Operated Appliances

DETAILS
Edition Number:10SCC Approved:--
Edition Date:2011-03-02DOD Approved: 1976-05-11
Price Code:BANSI Approved: 2018-08-08
Type:ulstd

  • SCOPE

    1 Scope

    1.1 These requirements cover motor-operated appliances to be employed in accordance with the National Electrical Code, NFPA 70.

    1.2 These requirements also cover small utilization appliances, such as vibrators in which motion of an operating part is produced by electrical means.

    1.3 These requirements do not cover appliances rated more than 600 V; nor do they cover appliances involving universal motors rated more than 250 V.

    1.4 These requirements do not cover equipment intended particularly for the control of electric motors; separator motors; nor electric clocks, fans, clothes dryers, washing machines, hair dryers, tools, waste disposers, dishwashers, office appliances and business equipment, refrigerators, air conditioners, vending and amusement machines, hair clippers and shavers, snow movers, automotive and garage equipment, or other motor-operated appliances that are covered by individual requirements.

    1.5 An appliance that utilizes some other source of energy, such 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 appliance under consideration.

    1.6 Manually operated die-cutting machines without electrical parts need only comply with the following applicable requirements. Industrial machines of this type are not addressed by these requirements.

    a)    Protection Against Injury to Persons – Sections 32 – 36 and 41;

    b)    Performance – Section 58;

    c)    Markings – 70.1 (excluding electrical rating); and

    d)    Instruction Manual – Section 71.

    1.7 Insect and rodent-control equipment generating ultraviolet (UV) radiation are intended for use in accordance with the Code of Federal Regulations, the Performance Standards for Light-Emitting Products, 21 CFR, Part 1040, Chapter 1, Subchapter J.

  • TABLE OF CONTENTS
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    • Cover
    • Transmittal
    • Table of Contents
      • Body
        • INTRODUCTION
          • 1 Scope
          • 2 Glossary
          • 3 Units of Measurement
          • 4 References
        • CONSTRUCTION
          • 5 General
          • 6 Components
            • 6.1 General
            • 6.2 Attachment plugs, receptacles, connectors, and terminals
            • 6.3 Batteries and battery chargers
            • 6.4 Boxes and raceways
            • 6.5 Capacitors and filters
            • 6.6 Controls
            • 6.7 Cords, cables, and internal wiring
            • 6.8 Cord reels
            • 6.9 Film-coated wire (magnet wire)
            • 6.10 Gaskets and seals
            • 6.11 Ground-fault, arc-fault, and leakage current detectors/interrupters
            • 6.12 Heaters and heating elements
            • 6.13 Insulation systems
            • 6.14 Light sources and associated components
            • 6.15 Marking and labeling systems
            • 6.16 Motors and motor overload protection
            • 6.17 Overcurrent protection
            • 6.18 Polymeric materials and enclosures
            • 6.19 Power supplies
            • 6.20 Printed wiring boards
            • 6.21 Semiconductors and small electronic components
            • 6.22 Supplemental insulation, insulating bushings, and assembly aids
            • 6.23 Switches
            • 6.24 Transformers
            • 6.25 Valves (electrically operated) and solenoids
            • 6.26 Video and audio components
          • 7 Frame and Enclosure
          • 8 Adhesives Used to Secure Parts
          • 9 Mechanical Assembly
          • 10 Protection Against Corrosion
          • 11 Accessibility of Uninsulated Live Parts and Film-Coated Wire
          • 12 Supply Connections
            • 12.1 General
            • 12.2 Cord-connected appliances
            • 12.3 Permanently connected appliances
          • 13 Current-Carrying Parts
          • 14 Electrical Insulation
          • 15 Internal Wiring
            • 15.1 Mechanical protection
            • 15.2 Splices and connections
          • 16 Tabs Used in Electrical Quick-Connect Terminals
            • 16.1 General
            • 16.2 Material requirements
            • 16.3 Dimensional requirements
          • 17 Separation of Circuits
          • 18 Capacitors
          • 19 Grounding
            • 19.1 General
            • 19.2 Grounding identification
          • 20 Heating Elements
          • 21 Lampholders
          • 21A Lamps that Emit Ultraviolet (UV) Radiation
          • 22 Motors
            • 22.1 Construction
            • 22.2 Brush wear out
            • 22.3 Overload protection
            • 22.4 Insulation systems
          • 23 Overload- or Thermal-Protective Devices
          • 24 Arc-Fault, and Leakage Current Detectors / Interrupters
          • 25 Receptacles
          • 26 Switches and Controls
          • 27 Controls – End Product Test Parameters
            • 27.1 General
            • 27.2 Auxiliary controls
            • 27.3 Operating controls (regulating controls)
            • 27.4 Protective controls (limiting controls)
            • 27.5 Controls using a temperature sensing device
          • 28 Spacings
          • 29 Spacings On Printed Wiring Boards
          • 30 Components Used in Automatic Solar Cleaning Systems
          • 31 Flooding of Live Parts
        • PROTECTION AGAINST INJURY TO PERSONS
          • 32 General
          • 33 Sharp Edges
          • 34 Enclosures and Guards
          • 35 Materials
          • 36 Rotating or Moving Members
          • 37 Parts Subject to Pressure
          • 38 Pressure-Relief Devices
          • 39 Switches, Controls, and Interlocks
          • 40 Specific Appliances
            • 40.1 Self-propelled appliance
            • 40.2 Recessed ultrasonic cleaner
          • 41 Stability
          • 41A Protection from Overexposure to Ultraviolet (UV) Radiation
        • PERFORMANCE
          • 42 Leakage Current Test
          • 43 Leakage Current Test Following Humidity Conditioning
          • 44 Starting Current Test
          • 45 Input Test
          • 46 Temperature Tests
            • 46.1 General
            • 46.2 Maximum normal load
          • 47 Surface Temperature Tests
            • 47.1 Exterior surfaces
            • 47.2 Contact surfaces
          • 48 Dielectric Voltage-Withstand Test
          • 49 Continuous Operation Test
          • 50 Resistance-to-Moisture Test
            • 50.1 Water spray test
            • 50.2 Flooding of live parts
            • 50.3 Automatic solar panel cleaning systems – flooding overflow test
            • 50.4 Flooding overflow test for recessed ultrasonic cleaners
            • 50.5 Flooding immersion test for recessed ultrasonic cleaners
          • 51 Tests on Switches and Controls
          • 52 Puncture Test for Recessed Ultrasonic Cleaners
          • 53 Strain-Relief Test
          • 54 Abnormal Operation Test
            • 54.1 General
            • 54.2 Electronic components
          • 55 Abnormal Operation Tests for Recessed Ultrasonic Cleaners
            • 55.1 General
            • 55.2 Electronic components
            • 55.3 Dry operation test
          • 55A Rechargeable and Automatic Flashlights and Lanterns
          • 56 Radiation Test
          • 57 Ozone Test
          • 58 Operational Test
          • 59 Permanence of Marking Test
          • 60 Permanence of Cord Tag Test
            • 60.1 General
          • 61 Solenoids
          • 62 General Purpose Transformers
            • 62.1 General
            • 62.2 Voltage measurement test
            • 62.3 Overload test
            • 62.4 Repeated dielectric voltage-withstand test
          • 63 Thermoplastic Motor Insulation Systems
            • 63.1 General
            • 63.2 Abnormal conditioning
            • 63.3 Overload-burnout conditioning
            • 63.4 Thermal aging
          • 64 Electrically Operated Valves (Class 2) for Use in Automatic Solar Panel Cleaning Systems
            • 64.1 Torque test
            • 64.2 Hydrostatic strength test
            • 64.3 Burnout test
          • 65 Interlock System Endurance Test – Recessed Ultrasonic Cleaners
          • 66 Polymeric Enclosure Mechanical Resistance – Recessed Ultrasonic Cleaners
            • 66.1 Crushing resistance test
            • 66.2 Resistance to impact test
          • 66A Ultraviolet Irradiance Test
        • MANUFACTURING AND PRODUCTION TESTS
          • 67 Dielectric Voltage-Withstand Test
          • 68 Grounding Continuity Test
        • RATING
          • 69 Details
        • MARKING
          • 70 Details
            • 70.1 General
            • 70.2 Permanently connected appliances
            • 70.3 Cord-connected appliances
            • 70.4 Carbonators
            • 70.5 Insect-exterminating appliances
            • 70.6 Outdoor use insect and rodent control equipment
            • 70.7 Components
            • 70.8 Outdoor-use appliance
            • 70.9 Double-insulated appliances
            • 70.10 Rechargeable and automatic flashlights and lanterns
            • 70.11 Markings for insect and rodent-control equipment which emit ultraviolet (UV) radiation
        • INSTRUCTION MANUAL
          • 71 General
          • 72 Instructions pertaining to risk of fire, electric shock, or injury to persons
          • 73 Installation instructions
          • 74 Operating instructions
            • 74.5 Rechargeable and automatic flashlights and lanterns
          • 75 User-Maintenance Instructions
          • 75A Instructions for Insect and Rodent-Control Equipment Generating Ultraviolet Radiation
        • PROTECTION FROM CONTAMINATION
          • 76 Scope
          • 77 Construction
          • 78 Performance
          • 79 Marking
        • DIRECT PLUG-IN INSECT AND RODENT CONTROL APPLIANCES
          • 80 General
          • 81 Construction
          • 82 Performance
          • 83 Markings
    • UL 60335-1 BASED REQUIREMENTS FOR THE EVALUATION OF ELECTRONIC CIRCUITS