UL 1447
Standard for Electric Lawn Mowers

DETAILS
Edition Number:5SCC Approved:--
Edition Date:2011-08-01DOD Approved: --
Price Code:CANSI Approved: 2013-12-13
Type:ulstd

  • SCOPE

    1 Scope

    1.1 These requirements cover cord-connected electrically operated lawn mowers rated 250 volts or less to be employed in accordance with the National Electrical Code, ANSI/NFPA 70. These requirements also cover battery-operated lawn mowers.

    1.2 These requirements do not cover equipment for use in hazardous locations as defined in the National Electrical Code, ANSI/NFPA 70.

    1.3 These requirements do not cover sulky-type lawn mowers, garden tractors or their attachments, flail mowers, sickle-bar mowers, robotic lawn mowers, or lawn mowers intended for commercial use.

    1.4 In addition to the requirements in this standard, a lawn mower shall comply with the Safety Specification for Consumer Turf-Care Equipment – Walk-Behind Mowers and Ride-On Machines with Mowers, ANSI B71.1, and with the Safety Standard for Walk-Behind Power Lawn Mowers, 16 CFR 1205.

    1.5 In the text, a requirement that applies only to a rotary or other type of lawn mower is identified by a specific reference in that requirement to the specific lawn mower involved. Absence of the specific reference, or use of the term lawn mower, indicates that the requirement applies to all of the lawn mowers covered in this standard.

  • TABLE OF CONTENTS
    Expand All

    • Cover
    • Transmittal
    • Table of Contents
      • Body
        • PART 1 – ALL LAWN MOWERS
          • INTRODUCTION
          • 1 Scope
          • 2 Units of Measurement
          • 3 Undated References
          • 4 Glossary
          • CONSTRUCTION
          • 5 General
            • 5.2 Attachment plugs, receptacles, connectors, and terminals
            • 5.3 Batteries
            • 5.4 Boxes and raceways
            • 5.5 Capacitors and filters
            • 5.6 Controls
            • 5.7 Cords, cables, and internal wiring
            • 5.8 Cord reels
            • 5.9 Film-coated wire (magnet wire)
            • 5.10 Gaskets, seals and tubing
            • 5.11 Ground-fault, arc-fault, and leakage current detectors / interrupters
            • 5.12 Insulation systems
            • 5.13 Light sources and associated components
            • 5.14 Marking and labeling systems
            • 5.15 Motors and motor overload protection
            • 5.16 Overcurrent protection
            • 5.17 Polymeric materials and enclosures
            • 5.18 Printed-wiring boards
            • 5.19 Semiconductors and small electrical and electronic components
            • 5.20 Supplemental insulation, insulating bushings, and assembly aids
            • 5.21 Switches
            • 5.22 Transformers
            • 5.23 Valves (electrically operated) and solenoids
          • 6 Frame and Enclosure
            • 6.1 General
            • 6.2 Metallic enclosures
            • 6.3 Polymeric enclosures
            • 6.4 Handles
            • 6.5 Protection against corrosion
          • 7 Accessibility of Live Parts
          • 8 Accessibility of Moving Parts
          • 9 Mechanical Assembly
            • 9.1 General
            • 9.2 Lawn mowers shipped partially disassembled
          • 10 Handles
          • 11 Rotating Parts
          • 12 Supply Connections
            • 12.1 Power-supply cord
            • 12.2 Cord set
            • 12.3 Flexible cord
            • 12.4 Attachment plug
            • 12.5 Strain relief
            • 12.6 Bushings
          • 13 Live Parts
          • 14 Internal Wiring
            • 14.1 General
            • 14.2 Splices and connections
          • 15 Electrical Insulation
          • 16 Motors
          • 17 Switches and Controls
          • 18 Controls – End Product Test Parameters
            • 18.1 General
            • 18.2 Auxiliary controls
            • 18.3 Operating controls (regulating controls)
            • 18.4 Protective controls (limiting controls)
            • 18.5 Controls using a temperature sensing device
          • 19 Lampholders
          • 20 Capacitors
          • 21 Printed-Wiring Boards
          • 22 Spacings
          • 23 Grounding
          • PERFORMANCE
          • 24 General
          • 25 Leakage Current Test
          • 26 Starting Current Test
          • 27 Continuity of Ground Connection Test
          • 28 Input Test
          • 29 Impact Test
          • 30 Temperature Test
          • 31 Dielectric Voltage-Withstand Test
          • 32 Resistance to Moisture Tests
            • 32.1 High humidity
            • 32.2 Water spray
          • 33 Operation Tests
            • 33.1 Blade stopping time after long term cycling
            • 33.2 Peripheral speed
            • 33.3 Direction
            • 33.4 Operation indicator
            • 33.5 Sound level
          • 34 Abnormal Operation Test
          • 35 Handle Durability Test
          • 36 Attachment Plug Test
          • 37 Strain Relief Test
            • 37.1 Pull
            • 37.2 Torque
          • 38 Push-Back Relief Test
          • 39 Cord Flexing Test
          • 40 Pressure Pad Test
          • 41 Switch and Control Tests
            • 41.1 General
            • 41.2 Locked rotor test
            • 41.3 Reversing switch test
          • 42 Capacitor Test
          • 43 Accelerated Aging Test
          • 44 Permanency of Marking Tests
            • 44.1 General
            • 44.2 Oven aging test
            • 44.3 Immersion test
            • 44.4 Standard atmosphere test
          • 45 Polymeric Materials Other Than HB
            • 45.1 Mold stress evaluation
            • 45.2 Resistance to impact test
            • 45.3 Abnormal operation tests
            • 45.4 Flame resistance test
          • 46 Polymeric Materials Classified HB
            • 46.1 General
            • 46.2 Mold-stress evaluation
            • 46.3 Resistance to impact test
            • 46.4 Overload test
            • 46.5 Flame test
            • 46.6 Resistance to hot-wire ignition test
            • 46.7 High-current arc ignition test
          • MANUFACTURING AND PRODUCTION TESTS
          • 47 Production-Line Dielectric Voltage Withstand Test
            • 47.1 Other than double-insulated mowers
            • 47.2 Double-insulated mowers
          • 48 Production-Line Continuity of Ground Test
          • RATING
          • 49 General
          • MARKINGS
          • 50 General
          • 51 Identification and Rating
          • 52 Fuses
          • 53 Switches and Controls
          • 54 Cautionary Markings
          • INSTRUCTIONS
          • 55 Instruction Manual
            • 55.1 General
            • 55.2 Safety instructions
        • PART 2 – ROTARY LAWN MOWERS
          • GENERAL
          • 56 Scope
          • CONSTRUCTION
          • 57 Mechanical Assembly
          • 58 Switches and Controls
          • PERFORMANCE
          • 59 General
          • 60 Input Test
          • 61 Impact Test
          • 62 Out-of-Balance Test
          • 63 Blade Stopping Time
          • 64 Torque Test
          • 65 Structural Integrity Test
          • 66 Foot Contact Test
          • 67 Obstruction Test
          • 68 Movable Guard Test
          • 69 Thrown Object Test
        • PART 3 – DOUBLE-INSULATED LAWN MOWERS
          • GENERAL
          • 70 Scope
          • CONSTRUCTION
          • 71 Insulation
          • 72 Supply Connections
            • 72.1 Power supply cord
            • 72.2 Strain relief
            • 72.3 Bushings
          • 73 Grounding
          • 74 Internal Wiring
          • 75 Capacitors
          • 76 Motors
            • 76.1 Brush caps
            • 76.2 Commutators and armature end-turns
            • 76.3 Switches
            • 76.4 Brush holders
          • 77 Spacings
          • PERFORMANCE
          • 78 Leakage Current
          • 79 Insulation Resistance Test
          • 80 Dielectric Voltage-Withstand Test
          • 81 Resistance to Impact Test
          • 82 Resistance to Heat Test
          • 83 Overload Test
            • 83.1 General
            • 83.2 Test terminated – lawn mower does not operate
            • 83.3 Test terminated – lawn mower still operates
          • 84 Armature Investigation
          • MARKINGS
          • 85 Details
    • BATTERY-OPERATED LAWN MOWERS