UL 250
Household Refrigerators and Freezers

DETAILS
Edition Number:10SCC Approved:--
Edition Date:1993-11-01DOD Approved: 1976-03-23
Price Code:AANSI Approved: --
Type:ulcsa

  • SCOPE

    1 Scope

    1.1 This Standard applies to self-contained household refrigerators and freezers designed to be installed and used in residential occupancies in accordance with the Canadian Electrical Code, Part I, CSA Standard C22.2, and the National Electrical Code, ANSI/NFPA 70.

    1.2 These requirements apply to household refrigerators and freezers intended for connection to 15 or 20 A, 100 to 140 V or 15 A, 200 to 250 V, single phase, alternating-current (ac) circuits; and combination ac/dc circuits or direct-current (dc) circuits where the dc voltage does not exceed 30 V.

    1.3 The terms "appliance", "refrigerator", "product", "equipment", and "unit" are used interchangeably and refer to all household refrigerators, combination refrigerator-freezers, freezers, and refrigerated kitchen units or any part thereof covered by this Standard unless specifically noted otherwise.

    1.4 The equipment is air-cooled employing hermetic refrigerant motor-compressors or is of the absorption type employing electricity as a heat source. These requirements apply to (a) freestanding, wall-hung, recessed, and built-in refrigerators and freezers; (b) refrigerators and freezers for use in recreational vehicles; (c) refrigerated kitchen units; and (d) accessories.

    1.5 A product that contains features, characteristics, components, materials, or systems new or different from those in use when the Standard was developed, and that involves a risk of fire, electric shock, or injury to persons, shall be evaluated using the appropriate additional component and end-product requirements as determined necessary to maintain the level of safety for the user of the product as originally anticipated by the intent of this Standard.

  • TABLE OF CONTENTS
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    • Cover
    • Transmittal
    • UL/CSA Title Page
    • Table of Contents
    • ULCSAPREFACE
    • CSA Foreword
    • UL Foreword
      • Household Refrigerators and Freezers
        • 1 Scope
        • 2 Definitions
        • 3 General
          • 3.1 Components
          • 3.2 Units of measurement
          • 3.3 Undated references
        • 4 Construction
          • 4.1 General
          • 4.2 Enclosures
          • 4.3 Mechanical protection
          • 4.4 Electrical protection
          • 4.5 Assembly
          • 4.6 Accessories
          • 4.7 Latch-release mechanism
          • 4.8 Polymeric materials – application
          • 4.9 Field supply connections
          • 4.10 Wiring and wiring methods
          • 4.11 Secondary circuits
          • 4.12 Separation of circuits
        • 5 Electrical Components
          • 5.1 Capacitor
          • 5.2 Current-carrying parts
          • 5.3 Defrost heaters
          • 5.4 Guarding of lamps
          • 5.5 Incandescent lighting systems
          • 5.6 Insulating material
          • 5.7 Motors and motor overload protection
          • 5.8 Switches and controllers
          • 5.9 Transformers, power converters, and power inverters
        • 6 Electrical Spacings
          • 6.1 Line-voltage circuits
          • 6.2 Extra-low voltage (Class 2) circuits
        • 7 Refrigeration System
          • 7.1 Refrigerant
          • 7.2 Refrigerant tubing and fittings
          • 7.3 Refrigerant-containing parts
          • 7.4 Pressure relief
        • 8 Performance
          • 8.1 Instrumentation
          • 8.1.2 Pressure measurements
          • 8.2 Test voltage and frequency
          • 8.3 Leakage current test – cord-connected refrigerators
          • 8.4 Component washing test
          • 8.5 Input test
          • 8.6 Temperature and pressure test
          • 8.7 Starting test
          • 8.8 Dielectric voltage-withstand test
          • 8.9 Defrost test
          • 8.10 Defrost heater burnout test
          • 8.11 Condenser fan motor failure test
          • 8.12 Overflow test
          • 8.13 Spill test
          • 8.14 Stability test
          • 8.15 Static load test – cabinets
          • 8.16 Strain relief test
          • 8.17 Overvoltage and undervoltage tests
          • 8.18 Limited short circuit test
          • 8.19 Current overload test – bonding conductors and connections
          • 8.20 Defrost heater control tests
          • 8.21 Insulation resistance test
          • 8.22 Accelerated aging test – electric heaters
          • 8.23 Reliability test – heater terminations
          • 8.24 Strength tests – pressure containing components
          • 8.25 Shelf strength test
          • 8.26 Component restraint test
          • 8.27 Glass strength test
          • 8.28 Door latch release test
          • 8.29 Door hinge strength test
          • 8.30 Impact test
        • 9 Polymeric Materials – Performance
          • 9.1 Electrical enclosure flammability
          • 9.2 Vertical burning test – 5VA, 5VB, materials
          • 9.3 Vertical burning test – V-0, V-1, or V-2 solid materials
          • 9.4 Horizontal burning test – HB materials
          • 9.5 Horizontal burning test – HBF, HF-1, or HF-2 foamed materials
          • 9.6 Mold stress-relief test
          • 9.7 Fastener strength test
          • 9.8 Adhesive test
          • 9.9 Flame spread test
          • 9.10 Volume resistivity test
          • 9.11 High-current arc ignition test
          • 9.12 Hot wire ignition test
          • 9.13 Burnout test – impedance protected motors
          • 9.14 Electrical disturbance test
          • 9.15 Grounding continuity test
          • 9.16 Distortion test
          • 9.17 Heating test – condensate wiring
        • 10 Manufacturing and Production Tests
          • 10.1 Pressure tests
          • 10.2 Production line dielectric voltage-withstand tests
          • 10.3 Production line grounding continuity test
        • 11 Marking
          • 11.1 General
          • 11.2 Installation and operating instructions
    • REQUIREMENTS FOR REFRIGERATORS AND FREEZERS EMPLOYING A FLAMMABLE REFRIGERANT IN THE REFRIGERATING SYSTEM
    • Appendix A
    • Appendix B
    • Superseded List