UL 1240
Standard for Electric Commercial Clothes-Drying Equipment

DETAILS
Edition Number:4SCC Approved:--
Edition Date:2005-10-04DOD Approved: --
Price Code:AANSI Approved: 2019-03-25
Type:ulstd

  • SCOPE

    1 Scope

    1.1 These requirements cover electric commercial, industrial, and institutional clothes-drying equipment intended for use in accordance with the National Electrical Code, NFPA 70. Equipment covered by this Standard is not intended for use by the general public, but only by trained or supervised personnel.

    1.2 These requirements do not cover coin-operated clothes-drying equipment, flatirons, ironing machines, water heaters, water softeners, dry-cleaning machines, garment-finishing machines, clothes washers, or other equipment covered by requirements separate from this standard.

    1.3 Appliances and field-attached accessories including those that utilize some other source of energy – such as gas or steam– in addition to electric energy are investigated under these requirements and under such additional requirements as are applicable to the appliance under consideration.

  • TABLE OF CONTENTS
    Expand All

    • Cover
    • Transmittal
    • Table of Contents
      • Body
        • INTRODUCTION
          • 1 Scope
          • 2 References
          • 3 Glossary
          • 4 Components
          • 5 Units of Measurement
          • 6 Field-Attached Accessories
        • CONSTRUCTION
          • 7 Frame and Enclosure
          • 8 Accessibility of Uninsulated Live Parts and Film-Coated Wire
          • 9 Mechanical Assembly
          • 10 Protection Against Corrosion
          • 11 Power-Supply Connections
            • 11.1 General
            • 11.2 Permanently connected appliances
            • 11.3 For connection of grounded power-supply conductor
            • 11.4 For connection of equipment-grounding conductor
            • 11.5 Cord-connected appliances
          • 12 Internal Wiring
          • 13 Live Parts
          • 14 Electrical Insulation
          • 15 Thermal Insulation
          • 16 Motors
          • 17 Overcurrent Protection
          • 18 Lampholders
          • 19 Receptacles
          • 20 Switches
          • 20A Controls
            • 20A.1 General
            • 20A.2 Operating controls
            • 20A.3 Controls that manage safety critical functions (protective controls)
            • 20A.4 Temperature-regulating and temperature-limiting devices
            • 20A.5 Cycle selection controls
            • 20A.6 Door/lid interlock or lock protective controls
            • 20A.7 Water level detection controls
          • 21 Heating Elements
          • 22 Automatic Temperature Controls
          • 23 Capacitors
          • 24 Spacings
          • 24A Alternative Spacings – Clearances and Creepage Distances
          • 25 Grounding
        • PROTECTION AGAINST RISK OF INJURY TO PERSONS
          • 26 Automatic Restarting of Motor
          • 27 Stability
            • 27.1 Freestanding appliances
            • 27.2 Appliance stands
          • 28 Sharp Edges, Projections, and Moving Parts
          • 29 Parts Subject To Pressure
            • 29.1 Pressure vessels
            • 29.2 Pressure relief devices
          • 30 Contact with Rotating Tumbler
        • PERFORMANCE
          • 31 General
          • 32 Input Test
          • 33 Starting Current Test
          • 34 Insulation Resistance Test
          • 35 Dielectric Voltage Withstand Test
          • 36 Temperature Test
          • 37 Abnormal Operation Test
          • 38 Automatic Temperature Control Test
          • 39 Test for Switches
          • 40 Polymeric Materials Test
            • 40.1 General
            • 40.2 Mold stress-relief distortion test
            • 40.3 Horizontal burning test; HB
            • 40.4 Flammability test
            • 40.5 Resistance to impact test
            • 40.6 Crushing resistance test
            • 40.7 Hot-wire ignition test
            • 40.8 Thermal aging test
            • 40.9 Volume resistivity test
            • 40.10 Enclosure flammability test - large mass consideration
            • 40.11 High current arc resistance to ignition test (HAI)
          • 41 Overload Protection Test
          • 42 Strain Relief Test
          • 43 Permanence of Marking Test
          • 44 Hydrostatic Pressure Test
        • MANUFACTURING AND PRODUCTION TESTS
          • 45 Grounding Continuity Test
          • 46 Dielectric Voltage Withstand Test
        • RATING
          • 47 General
        • MARKING
          • 48 General
          • 49 Details
        • INSTALLATION INSTRUCTIONS
          • 50 General
    • (NORMATIVE) – EVALUATION OF ELECTRONIC CIRCUITS
    • APPENDIX A