UL 1447-2017 UL Standard for Safety Electric Lawn Mowers (Sixth Edition Reprint with Revisions Through and Including November 8 2017).pdf

1、UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL UL 1447 Electric Lawn Mowers STANDARD FOR SAFETYUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM ULUL COPYRIGHTED MATERIAL NOT AUTHORIZED

2、FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL UL Standard for Safety for Electric Lawn Mowers, UL 1447 Sixth Edition, Dated October 13, 2017 Summary of Topics The revision pages dated November 8, 2017 are being issued to incorporate editorial revisions, including updated outsid

3、e references and other editorial changes. All rights reserved. No part of this publication may be reproduced, stored in a retrieval system, or transmitted in any form by any means, electronic, mechanical photocopying, recording, or otherwise without prior permission of UL. UL provides this Standard

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7、ced while purchaser is storing an electronic Standard on the purchasers computer system. NOVEMBER 8, 2017 UL 1447 tr1UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL NOVEMBER 8, 2017 UL 1447 tr2 No Text on This PageUL COPYRIGHTED MATERIAL NOT

8、 AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL OCTOBER 13, 2017 (Title Page Reprinted: November 8, 2017) 1 UL 1447 Standard for Electric Lawn Mowers First Edition May, 1977 Second Edition September, 1988 Third Edition June, 1994 Fourth Edition May, 2006 Fifth Edition

9、 August, 2011 Sixth Edition October 13, 2017 This ANSI/UL Standard for Safety consists of the Sixth Edition including revisions through November 8, 2017. The most recent designation of ANSI/UL 1447 as an American National Standard (ANSI) occurred on October 13, 2017. ANSI approval for a standard doe

10、s not include the Cover Page, Transmittal Pages, and Title Page. Comments or proposals for revisions on any part of the Standard may be submitted to UL at any time. Proposals should be submitted via a Proposal Request in ULs On-Line Collaborative Standards Development System (CSDS) at https:/. ULs S

11、tandards for Safety are copyrighted by UL. Neither a printed nor electronic copy of a Standard should be altered in any way. All of ULs Standards and all copyrights, ownerships, and rights regarding those Standards shall remain the sole and exclusive property of UL. COPYRIGHT 2017 UNDERWRITERS LABOR

12、ATORIES INC. ANSI/UL 1447-2017UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL NOVEMBER 8, 2017 ELECTRIC LAWN MOWERS - UL 1447 2 No Text on This PageUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMI

13、SSION FROM UL CONTENTS PART 1 ALL LAWN MOWERS INTRODUCTION 1 Scope .8 2 Units of Measurement .8 3 References 8 4 Glossary 14 CONSTRUCTION 5 Components 20 5.1 General 20 5.2 Attachment plugs, receptacles, connectors, and terminals 21 5.3 Batteries .22 5.4 Boxes and raceways.22 5.5 Capacitors and lter

14、s 23 5.6 Controls 23 5.7 Cords, cables, and internal wiring .24 5.8 Cord reels 25 5.9 Film-coated wire (magnet wire)25 5.10 Gaskets, seals and tubing .25 5.11 Ground-fault, arc-fault, and leakage current detectors / interrupters.26 5.12 Insulation systems26 5.13 Light sources and associated componen

15、ts 26 5.14 Marking and labeling systems27 5.15 Motors and motor overload protection.27 5.16 Overcurrent protection 29 5.17 Polymeric materials and enclosures 30 5.18 Printed-wiring boards .30 5.19 Semiconductors and small electrical and electronic components .31 5.20 Supplemental insulation, insulat

16、ing bushings, and assembly aids.31 5.21 Switches 32 5.22 Transformers 32 5.23 Valves (electrically operated) and solenoids .32 6 Frame and Enclosure 33 6.1 General 33 6.2 Metallic enclosures 34 6.3 Polymeric enclosures 34 6.4 Handles 34 6.5 Protection against corrosion 36 7 Accessibility of Live Par

17、ts .36 8 Accessibility of Moving Parts 40 9 Mechanical Assembly 40 9.1 General 40 9.2 Lawn mowers shipped partially disassembled .42 10 Handles .43 11 Rotating Parts 43 12 Supply Connections .43 NOVEMBER 8, 2017 ELECTRIC LAWN MOWERS - UL 1447 3UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRO

18、DUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL 12.1 Power-supply cord43 12.2 Cord set 44 12.3 Flexible cord .44 12.4 Attachment plug44 12.5 Strain relief 45 12.6 Bushings 45 13 Live Parts45 14 Internal Wiring46 14.1 General .46 14.2 Splices and connections 47 15 Electrical Insulation .48 16 Moto

19、rs.49 17 Switches and Controls.49 18 Controls End Product Test Parameters 50 18.1 General .50 18.2 Auxiliary controls .50 18.3 Operating controls (regulating controls) .50 18.4 Protective controls (limiting controls) 52 18.5 Controls using a temperature sensing device 54 19 Lampholders .54 20 Capaci

20、tors .54 21 Printed-Wiring Boards .55 22 Spacings 55 23 Grounding .57 PERFORMANCE 24 General58 25 Leakage Current Test .58 26 Starting Current Test 61 27 Continuity of Ground Connection Test .61 28 Input Test61 29 Impact Test 62 30 Temperature Test.63 31 Dielectric Voltage-Withstand Test .67 32 Resi

21、stance to Moisture Tests.68 32.1 High humidity 68 32.2 Water spray .68 33 Operation Tests 72 33.1 Blade stopping time after long term cycling 72 33.2 Peripheral speed .72 33.3 Direction 72 33.4 Operation indicator .72 33.5 Sound level73 34 Abnormal Operation Test 73 35 Handle Durability Test .74 36

22、Attachment Plug Test .74 37 Strain Relief Test .75 37.1 Pull .75 37.2 Torque 76 38 Push-Back Relief Test.76 39 Cord Flexing Test.76 40 Pressure Pad Test 78 OCTOBER 13, 2017 ELECTRIC LAWN MOWERS - UL 1447 4UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISS

23、ION FROM UL 41 Switch and Control Tests 78 41.1 General .78 41.2 Locked rotor test .78 41.3 Reversing switch test .79 42 Capacitor Test80 43 Accelerated Aging Test 80 44 Permanency of Marking Tests 81 44.1 General .81 44.2 Oven aging test 81 44.3 Immersion test .82 44.4 Standard atmosphere test .82

24、45 Polymeric Materials Other Than HB .82 45.1 Mold stress evaluation 82 45.2 Resistance to impact test83 45.3 Abnormal operation tests 83 45.4 Flame resistance test .84 46 Polymeric Materials Classied HB 84 46.1 General .84 46.2 Mold-stress evaluation 85 46.3 Resistance to impact test85 46.4 Overloa

25、d test 85 46.5 Flame test .86 46.6 Resistance to hot-wire ignition test .86 46.7 High-current arc ignition test .86 MANUFACTURING AND PRODUCTION TESTS 47 Production-Line Dielectric Voltage Withstand Test 87 47.1 Other than double-insulated mowers87 47.2 Double-insulated mowers88 48 Production-Line C

26、ontinuity of Ground Test .88 RATING 49 General89 MARKINGS 50 General89 51 Identication and Rating .89 52 Fuses .90 53 Switches and Controls.90 54 Cautionary Markings 90 INSTRUCTIONS 55 Instruction Manual 93 55.1 General .93 55.2 Safety instructions 94 OCTOBER 13, 2017 ELECTRIC LAWN MOWERS - UL 1447

27、5UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL PART 2 ROTARY LAWN MOWERS GENERAL 56 Scope .98 CONSTRUCTION 57 Mechanical Assembly .99 58 Switches and Controls.99 PERFORMANCE 59 General99 60 Input Test.100 61 Impact Test .100 62 Out-of-Bala

28、nce Test102 63 Blade Stopping Time .102 64 Torque Test.103 65 Structural Integrity Test.103 66 Foot Contact Test .103 67 Obstruction Test .107 68 Movable Guard Test .107 PART 3 DOUBLE-INSULATED LAWN MOWERS GENERAL 69 Scope 109 CONSTRUCTION 70 Insulation .109 71 Supply Connections110 71.1 Power suppl

29、y cord 110 71.2 Strain relief .111 71.3 Bushings .111 72 Grounding 111 73 Internal Wiring.111 74 Capacitors 113 75 Motors .113 75.1 Brush caps .113 75.2 Commutators and armature end-turns .113 75.3 Switches .114 75.4 Brush holders.115 76 Spacings .115 PERFORMANCE 77 Leakage Current.117 78 Insulation

30、 Resistance Test 117 79 Dielectric Voltage-Withstand Test 118 OCTOBER 13, 2017 ELECTRIC LAWN MOWERS - UL 1447 6UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL 80 Resistance to Impact Test 118 81 Resistance to Heat Test 119 82 Overload Test .

31、120 82.1 General 120 82.2 Test terminated lawn mower does not operate 124 82.3 Test terminated lawn mower still operates 125 83 Armature Investigation .125 MARKINGS 84 Details .126 SUPPLEMENT SA - BATTERY-POWERED LAWN MOWERS SA1 Scope SA1 SA2 Construction and Performance SA1 SA3 Integral Battery Enc

32、losure Test SA3 OCTOBER 13, 2017 ELECTRIC LAWN MOWERS - UL 1447 7UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL PART 1 ALL LAWN MOWERS INTRODUCTION 1 Scope 1.1 These requirements cover cord-connected electrically operated lawn mowers rated

33、250 volts or less to be employed in accordance with ANSI/NFPA 70. 1.2 These requirements also cover battery-powered lawn mowers as specied in Battery-Powered Lawn Mowers, Supplement SA in this Standard. 1.3 These requirements do not cover equipment for use in hazardous locations as dened in the , AN

34、SI/NFPA 70. 1.4 These requirements do not cover sulky-type lawn mowers, garden tractors or their attachments, ail mowers, sickle-bar mowers, robotic lawn mowers, or lawn mowers intended for commercial use. 1.5 In addition to the requirements in this standard, a lawn mower shall comply with ANSI B71.

35、1, and with the Safety Standard for Walk-Behind Power Lawn Mowers, 16 CFR 1205. 1.6 In the text, a requirement that applies only to a rotary or other type of lawn mower is identied by a specic reference in that requirement to the specic lawn mower involved. Absence of the specic reference, or use of

36、 the term lawn mower, indicates that the requirement applies to all of the lawn mowers covered in this standard. 2 Units of Measurement 2.1 Values stated without parentheses are the requirement. Values in parentheses are explanatory or approximate information. 3 References 3.1 Any undated reference

37、to a code or standard appearing in the requirements in this standard shall be interpreted as referring to the latest edition of that code or standard. ANSI Standards ANSI/NFPA 70 National Electrical Code ANSI B71.1 Safety Specication for Consumer Turf-Care Equipment Walk-Behind Mowers and Ride-On Ma

38、chines with Mowers ANSI B71.1 Safety Specication for Consumer Turf-Care Equipment Walk-Behind Mowers and Ride-On Machines with Mowers ANSI Z21.21a/CSA 6.5a Automatic Valves for Gas Appliances, OCTOBER 13, 2017 ELECTRIC LAWN MOWERS - UL 1447 8UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODU

39、CTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL ASTM Standards ASTM E230/E230M Tolerances on Initial Values of EMF versus Temperature tables in the Standard Specication and Temperature-Electromotive Force (emf) Tables for Standardized Thermocouples IEC Standards IEC 61000-4-5 Electromagnetic Compat

40、ibility (Emc) Part 4-5: Testing And Measurement Techniques Surge Immunity Test IEC 61672-1 Electroacoustics Sound Level Meters Part 1: Specications IEC 61672-2 Electroacoustics Sound Level Meters Part 2: Pattern Evaluation Tests NFPA Standards ANSI/NFPA 70 National Electrical Code UL Standards UL 20

41、 General-Use Snap Switches UL 44 Thermoset-Insulated Wires and Cables UL 62 Flexible Cords and Cables UL 66 Fixture Wire UL 83 Thermoplastic-Insulated Wires and Cables UL 94 Tests for Flammability of Plastic Materials for Parts in Devices and Appliances UL 157 Gaskets and Seals UL 224 Extruded Insul

42、ating Tubing UL 244A Solid-State Controls for Appliances NOVEMBER 8, 2017 ELECTRIC LAWN MOWERS - UL 1447 8AUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL UL 248-1 Low-Voltage Fuses Part 1: General Requirements UL 248-5 Low-Voltage Fuses Par

43、t 5: Class G Fuses UL 310 Electrical Quick-Connect Terminals UL 355 Cord Reels UL 429 Electrically Operated Valves UL 486A-486B Wire Connectors UL 486C Splicing Wire Connectors UL 486E Equipment Wiring Terminals for Use with Aluminum and/or Copper Conductors UL 496 Lampholders UL 489 Molded-Case Cir

44、cuit Breakers, Molded-Case Switches and Circuit-Breaker Enclosures UL 498 Attachment Plugs and Receptacles 489A Circuit Breakers For Use in Communications Equipment UL 507 Electric Fans UL 508 Industrial Control Equipment UL 508C Power Conversion Equipment UL 510 Polyvinyl Chloride, Polyethylene, an

45、d Rubber Insulating Tape UL 514A Metallic Outlet Boxes UL 514C Nonmetallic Outlet Boxes, Flush-Device Boxes and Covers NOVEMBER 8, 2017 ELECTRIC LAWN MOWERS - UL 1447 8BUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL UL 514D Cover Plates for

46、 Flush-Mounted Wiring Devices NOVEMBER 8, 2017 ELECTRIC LAWN MOWERS - UL 1447 9UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL NOVEMBER 8, 2017 ELECTRIC LAWN MOWERS - UL 1447 10 No Text on This PageUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR

47、FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL UL 635 Insulating Bushings UL 746A Polymeric Materials Short Term Property Evaluations UL 746B Polymeric Materials Long Term Property Evaluations UL 746C Polymeric Materials Use in Electrical Equipment Evaluations UL 746D Polymeric Mate

48、rials Fabricated Parts UL 758 Appliance Wiring Material UL 773A Nonindustrial Photoelectric Switches for Lighting Control UL 796 Printed-Wiring Boards UL 810 Capacitors UL 817 Cord Sets and Power-Supply Cords UL 873 Temperature-Indicating and Regulating Equipment UL 917 Clock-Operated Switches UL 93

49、5 Fluorescent-Lamp Ballasts UL 943 Ground-Fault Circuit-Interrupters UL 943B Appliance Leakage-Current Interrupters UL 969 Marking and Labeling Systems UL 991 Tests for Safety-Related Controls Employing Solid-State Devices UL 1004-1 Rotating Electrical Machines General Requirements OCTOBER 13, 2017 ELECTRIC LAWN MOWERS - UL 1447 11UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL UL 1004-2 Impedance Prote