UL 197
Standard for Commercial Electric Cooking Appliances

DETAILS
Edition Number:10SCC Approved:--
Edition Date:2010-03-17DOD Approved: 1976-01-28
Price Code:BANSI Approved: 2014-09-17
Type:ulstd

  • SCOPE

    1 Scope

    1.1 These requirements cover commercial electric cooking appliances rated 600 volts or less, intended for indoor use, and intended for use in accordance with the National Electrical Code, NFPA 70.

    1.2 These requirements cover coffee makers, conductive cookers, food warmers, fryers, griddles, steam kettles, steam cookers, nut warmers, popcorn machines, ranges, utensil warmers, and other appliances found in commercial kitchens, restaurants, or other business establishments where food is dispensed.

    1.3 These requirements do not cover vending machines, cooking appliances intended for household use, commercial cooking appliances rated more than 600 volts, or microwave cooking appliances.

    1.4 An appliance designed so that it can be mounted and supported at an outlet box, such as a food warmer, is judged on the basis of compliance with the requirements in this Standard and with the mounting and weight requirements for electric lighting fixtures.

    1.5 An appliance that utilizes heat produced by a means other than electrical (for example, gelled or liquid fuel, coal, gas, or oil) is also investigated with respect to the additional risk of fire.

    1.6 An appliance that utilizes heat produced by gelled or liquid fuel is also investigated with the appliance operating with the specific fuel(s) which it intended to be used.

    1.7 Commercial cooking equipment employing integral systems for limiting the emission of grease laden air are intended to be installed in accordance with the Standard for Ventilation Control and Fire Protection of Commercial Cooking Operations, NFPA 96, and shall comply with the requirements of this Standard. Additionally, the effluent emitted from the system shall not exceed 5 mg/m3 as measured in accordance with the U. S. Environmental Protection Agency (EPA) Test Method 202, Determination of Condensible Particulate Emissions From Stationary Sources.

    1.8 Commercial cooking equipment employing integral recirculating systems shall comply with the requirements of this Standard and the requirements in the Standard for Recirculating Systems, UL 710B.

  • TABLE OF CONTENTS
    Expand All

    • Cover
    • Transmittal
    • Table of Contents
      • Body
        • PART 1 – ALL APPLIANCES
          • INTRODUCTION
          • 1 Scope
          • 2 Glossary
          • 3 Components
          • 4 Units of Measurement
          • 5 Undated References
          • CONSTRUCTION
          • 5A General
            • 5A.2 Ground-fault, arc-fault, and leakage current detectors/interrupters
            • 5A.3 Surge protective device
            • 5A.4 Terminal blocks
            • 5A.5 Quick-connects
            • 5A.6 Insulating tape and tubing
            • 5A.7 Programmable controllers
            • 5A.8 Fabricated polymeric parts
            • 5A.9 Door latch release
          • 6 Accessories
          • 7 Mechanical Assembly
            • 7.1 General
            • 7.2 Mounting of components
            • 7.3 Shipping
          • 8 Electrical and Fire Enclosures
            • 8.1 General
            • 8.2 Metallic enclosures
            • 8.3 Nonmetallic enclosures
            • 8.4 Fire containment – general
            • 8.5 Fire containment – enclosures for overcurrent protective device
            • 8.6 Grease troughs and pans
          • 9 Outer Cabinetry/ Enclosures
          • 10 Accessibility of Live Parts
            • 10.1 General
            • 10.2 Open wire heating elements
            • 10.3 Lamps, quartz enclosed heating elements, and similar components
            • 10.4 Fuses, circuit breakers, supplementary protectors, and manually reset controls
          • 11 Guarding of Moving Parts
            • 11.1 General
            • 11.2 Materials
          • 12 Protection Against Injury to Persons
          • 13 Protection of Service Personnel
          • 14 Interlocks
            • 14.1 General
            • 14.2 Moving parts
          • 15 Protection Against Corrosion
          • 16 Electrical Supply Connections for Permanently Connected Appliances
            • 16.1 General
            • 16.2 Wiring compartment
            • 16.3 Field-wiring terminals and leads
            • 16.4 Grounded supply conductor
            • 16.5 Equipment grounding connection
          • 17 Electrical Supply Connections for Cord-Connected Appliances
            • 17.1 General
            • 17.2 Strain relief
            • 17.3 Bushings
            • 17.4 Grounding
            • 17.5 Multiple power supply cords
          • 18 Bonding for Grounding
          • 19 Polarity
          • 20 Current-Carrying Parts
          • 21 Attachment-Plug Receptacles
          • 22 Internal Wiring
            • 22.1 General
            • 22.2 Insulation
            • 22.3 Protection
            • 22.4 Wiring in circuits involving a risk of fire or electric shock
            • 22.5 Splices and connections
          • 23 Heating Elements
          • 24 Electrical Insulation
            • 24.6 Film-coated wire (magnet wire)
          • 25 Thermal Insulation
          • 26 Motors and Transformers
            • 26.1 Motors in circuits involving a risk of fire or electric shock
            • 26.2 Motor protection
            • 26.3 Transformers
          • 27 Temperature Controls
          • 28 Short-Circuit and Ground-Fault Protection
            • 28.1 General
            • 28.2 Supplementary-type overcurrent protective devices used as short-circuit and ground-fault protection
            • 28.3 Protection for circuits including specific components
            • 28.4 Protection for wiring located outside the enclosure
            • 28.5 Protection for high-voltage control circuits conductors
          • 29 Auxiliary-Circuit Terminals
          • 30 Capacitors
          • 31 Switching Devices
            • 31.1 General
            • 31.2 Electrical ratings
            • 31.3 Guarding
            • 31.4 Specific applications
          • 32 Components Containing Liquid Metal
          • 33 Lampholders
          • 33A Light Sources and Associated Components
          • 34 Secondary Circuits
            • 34.1 General
            • 34.2 Evaluation of the different types of secondary circuits
            • 34.3 Class 2 circuits
            • 34.4 Limited voltage/current circuits
            • 34.5 Limited voltage circuit requirements
            • 34.6 Limited energy circuits
            • 34.7 Limiting impedance circuits
            • 34.8 Safety extra-low voltage circuits
          • 35 Lithium Battery Circuits
          • 36 Isolating Devices
          • 37 Electrical Spacings
            • 37.1 General
            • 37.2 Secondary circuits
          • 38 Insulating Barriers
          • 39 Clearance and Creepage Distances
          • 40 Separation of Circuits
          • 41 Parts Subject to Pressure
            • 41.1 General
            • 41.2 Pressure relief means
            • 41.3 Pressure relief devices
            • 41.4 Pressure Controls
          • 42 Stability
          • 43 Surface Mounted Appliances
            • 43.1 General
            • 43.2 Wall mounting
            • 43.3 Under cabinet units
          • 44 Gas-Tube Signs
          • PERFORMANCE – COMPLETE APPLIANCE
          • 45 General
          • 46 Leakage Current Test
          • 47 Power Input Test
          • 48 Input Averaging Test
          • 49 Short-Circuit Tests
          • 50 Normal Temperature Test
            • 50.1 General
            • 50.2 Surface temperatures
            • 50.3 Test equipment
            • 50.4 Procedure
            • 50.5 Normal test conditions
          • 51 Dielectric Voltage-Withstand Test
            • 51.1 General
            • 51.2 Primary circuits
            • 51.3 Secondary Circuits
            • 51.4 Transformers
          • 52 Resistance to Moisture Test
          • 53 Insulation Resistance Test
          • 54 Grounding and Bonding Test
            • 54.1 Grounding
            • 54.2 Bonding
          • 55 Stability
          • 56 Abnormal Heating Test
            • 56.1 General
            • 56.2 Procedure
            • 56.3 Test conditions – disabled thermostat
            • 56.4 Test conditions – locked rotor
            • 56.5 Stalled fan test – control compartment fan
            • 56.6 Abnormal dry operation test
            • 56.7 Test conditions – specific appliances
          • 57 Breakdown of Components Test
          • 58 Wiring Endurance Test
          • 59 Cord Endurance Test – Hand-held Appliances
          • 60 Strain Relief Test
          • 61 Push-Back Relief
          • 62 Thermal Shock Test – Glass/Ceramic Cooking Surfaces
          • 63 Strength of Enclosures, Frames, and Guards Test
            • 63.1 General
            • 63.2 Static force test
            • 63.3 Impact test – frames, guards, and metal enclosures
            • 63.4 Impact test – glass/ceramic-cooking surfaces
            • 63.5 Impact – exposed glass parts other than glass/ceramic cooking surfaces
          • 64 Mounting Means Test
          • 65 Reservoir Tests
            • 65.1 General
            • 65.2 Overflow test for automatic fill appliances
            • 65.3 Overflow test for manual fill appliances
            • 65.4 Removable container test
          • 65A Door Latch Release Test
          • 65B Door Opening Test
          • PERFORMANCE – COMPONENTS
          • 66 General
          • 67 Transformer Burnout Test
          • 68 Endurance Test for Temperature-Regulating Controls
          • 69 Endurance Test for Interlock Switches
          • 70 Motor Switch Overload Test
          • 71 Components Containing Liquid Metal Test
          • 72 Printed-Wiring Board Abnormal Operation Test
          • 73 Secondary Circuits Tests
            • 73.1 General
            • 73.2 Maximum voltage
            • 73.3 Maximum current test for inherently limited circuits
            • 73.4 Limited power point determination test
            • 73.5 Component failure
            • 73.6 Maximum power test
            • 73.7 Power dissipation test
          • 74 Parts Subject to Contact with Oil or Other Liquids
          • 75 Hydrostatic Pressure Test
          • 76 Start-To-Discharge Test
          • 77 Relief Device Maximum Pressure Test
          • 78 Pressure Controls Endurance Test
          • 79 Permanence of Marking Test
            • 79.1 Labels
            • 79.2 Cord tags
          • MANUFACTURING AND PRODUCTION TESTS
          • 80 Dielectric Voltage-Withstand
          • 81 Grounding Continuity
          • 82 Pressure Vessels and Parts Subject to Pressure
          • APPLIANCE RATINGS
          • 83 Electrical Ratings
          • MARKING
          • 84 General
          • 85 Visible to Operator
          • 86 Visible After Installation
          • 87 Graphical Symbols and Supplemental Markings
            • 87.1 No user-serviceable parts compartment warning
            • 87.2 Graphical symbol size and color
            • 87.3 Supplemental marking size and color
            • 87.4 Size of outlines and symbols
            • 87.5 Explanation of graphical symbols in the operating instructions
          • 88 Visible During Installation and Examination
          • 89 Visible During Servicing Operations
          • 90 Nonpermanent Marking
          • INSTRUCTIONS
          • 91 Manufacturer's Literature
        • PART 2 – COMMERCIAL ELECTRIC COOKING APPLIANCES FOR MARINE USE
          • 92 Scope
          • 93 Cleaning and Maintenance
          • 94 Hinges and Locking Devices
          • 95 Protection of Personnel
          • 96 Securing of Appliances
          • 97 Disconnecting Means
          • 98 Performance
            • 98.1 General
            • 98.2 Vibration test
            • 98.3 Shock test
          • 99 Marking
        • PART 3 – DEEP-FAT FRYERS AND RELATED EQUIPMENT
          • INTRODUCTION
          • 100 Scope
          • CONSTRUCTION
          • 101 Temperature Controls
          • 102 Switching Devices
          • 103 Stability
          • PERFORMANCE
          • 104 Normal Temperature Test
          • 105 Disabled Temperature Regulating Control – Oil Temperature Test
          • 106 Abnormal Heating Test
          • MANUFACTURING AND PRODUCTION TESTS
          • 107 General
          • 108 Limiting Controls
          • MARKINGS
          • 109 General
        • PART 4 – COMMERCIAL ELECTRIC COOKING APPLIANCES WITH SEMICONDUCTOR HEATING ELEMENTS
          • INTRODUCTION
          • 110 Scope
          • CONSTRUCTION
          • 111 Heating Element
          • 112 Switches
          • PERFORMANCE
          • 113 General
          • 114 Input Test
          • 115 Normal Temperature Test
          • 116 Low Ambient Temperature Starting Test
          • 117 Abnormal Heating Test – Restricted Air Flow
          • 118 Endurance Test
          • 119 Input Current Test
          • 120 Overload and Endurance Test
          • RATINGS
          • 121 Electrical Ratings
        • PART 5 – DOUBLE INSULATION
          • INTRODUCTION
          • 122 Scope
          • CONSTRUCTION AND PERFORMANCE
          • 123 General
          • MANUFACTURING AND PRODUCTION TESTS
          • 124 Production Line Dielectric Voltage-Withstand
          • 125 Production Line Grounding Continuity
          • MARKINGS
          • 126 General
        • PART 6 – COMMERCIAL ELECTRIC DRIP-TYPE COFFEE MAKERS AND SIMILAR DRIP-TYPE BREWING APPLIANCES
          • INTRODUCTION
          • 127 Scope
          • CONSTRUCTION
          • 128 Assembly
          • 129 Thermal Conductivity
          • 130 Operating Controls
          • 131 Power-On Indicator
          • 132 Temperature Controls
            • 132.1 Temperature regulating controls
            • 132.2 Temperature limiting controls
          • PERFORMANCE
          • 133 General
          • 134 Normal Temperature Test
          • 135 Leakage Current as a Result of Moisture
          • 136 Stability Test
          • 137 Mounting Means Test
          • 138 Impact Test
          • 139 Abnormal Operation Tests
            • 139.1 General
            • 139.2 Dry operation test
            • 139.3 Fusible devices
            • 139.4 Water valve failure
          • MARKINGS
          • 140 Details
        • PART 7 – COMMERCIAL COOKING APPLIANCES FOR OUTDOOR USE
          • INTRODUCTION
          • 141 Scope
          • 142 Glossary
          • CONSTRUCTION
          • 143 Cord Connected
          • 144 Field Wiring Connected
          • 145 Enclosures
          • 146 Corrosion Protection of Enclosures Exposed to Weather
          • PERFORMANCE
          • 147 General
          • 148 Rain Test
          • 149 Metallic Coating Thickness Test
          • 150 Cold Impact
          • 151 Accelerated Aging Tests
          • 152 Ultraviolet Light Exposure
          • 153 Water Exposure and Immersion
          • 154 Markings
          • 155 Installation Instructions
    • Appendix A