1、UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL UL 1951 Electric Plumbing Accessories STANDARD FOR SAFETYUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM ULUL COPYRIGHTED MATERIAL NOT AU
2、THORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL UL Standard for Safety for Electric Plumbing Accessories, UL 1951 Second Edition, Dated July 22, 2011 SUMMARY OF TOPICS This revision to ANSI/UL 1951 include the following changes in requirements: Clarify button or coin cel
3、l batteries of lithium technologies The revised requirements are substantially in accordance with Proposal(s) on this subject dated July 14, 2017. Text that has been changed in any manner or impacted by ULs electronic publishing system is marked with a vertical line in the margin. All rights reserve
4、d. 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 as is without warranty of any kind, either expressed or impl
5、ied, including but not limited to, the implied warranties of merchantability or tness for any purpose. In no event will UL be liable for any special, incidental, consequential, indirect or similar damages, including loss of prots, lost savings, loss of data, or any other damages arising out of the u
6、se of or the inability to use this Standard, even if UL or an authorized UL representative has been advised of the possibility of such damage. In no event shall ULs liability for any damage ever exceed the price paid for this Standard, regardless of the form of the claim. Users of the electronic ver
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8、 purchasers computer system. AUGUST 25, 2017 UL 1951 tr1UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL AUGUST 25, 2017 UL 1951 tr2 No Text on This PageUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT P
9、ERMISSION FROM UL JULY 22, 2011 (Title Page Reprinted: August 25, 2017) 1 UL 1951 Standard for Electric Plumbing Accessories First Edition April, 1994 Second Edition July 22, 2011 This ANSI/UL Standard for Safety consists of the Second Edition including revisions through August 25, 2017. The most re
10、cent designation of ANSI/UL 1951 as an American National Standard (ANSI) occurred on August 25, 2017. ANSI approval for a standard does 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. Pr
11、oposals should be submitted via a Proposal Request in ULs On-Line Collaborative Standards Development System (CSDS) at https:/. ULs Standards 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, o
12、wnerships, and rights regarding those Standards shall remain the sole and exclusive property of UL. COPYRIGHT 2017 UNDERWRITERS LABORATORIES INC. ANSI/UL 1951-2017UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL AUGUST 25, 2017 ELECTRIC PLUMB
13、ING ACCESSORIES - UL 1951 2 No Text on This PageUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL CONTENTS PART 1 ALL EQUIPMENT INTRODUCTION 1 Scope .5 2 Units of Measurement .5 3 Undated References 5 4 Glossary .5 CONSTRUCTION 5 Components 6B
14、 5.1 General 6B 5.2 Attachment plugs and receptacles 9 5.3 Batteries and battery chargers 10 5.3A Button or coin cell batteries of lithium technologies .10 5.4 Capacitors and lters .10A 5.5 Controls 11 5.6 Cords, cables, and internal wiring .14 5.7 Ground-fault, arc-fault, and leakage current detect
15、ors/interrupters .15 5.8 Heaters, heating elements and pads .15 5.9 Insulation systems .15 5.10 Light sources and associated components 16 5.11 Overcurrent protection 16 5.12 Power supplies .17 5.13 Printed wiring boards .17 5.14 Quick-connect wire connectors .17 5.15 Semiconductors and small electr
16、onic components 18 5.16 Supplemental insulation, insulating bushings, and assembly aids .18 5.17 Switches 19 5.18 Terminal blocks .20A 5.19 Transformers .20A 5.20 Valves (electrically operated) and solenoids 20B 5.21 Wire connectors 20B 5.22 Thermistors 20B 5A Safety Critical Functions 21 6 Frame an
17、d Enclosure 21 6.1 General 21 6.2 Barriers 22 6.3 Doors and covers .23 6.4 Cast metal 23 6.5 Sheet metal 23 6.6 Nonmetallic enclosures .26A 6.7 Outdoor-use enclosures 26A 6.8 Button or coin cell batteries of lithium technologies .26A 7 Mounting 26A 7.1 Permanently connected units 26A 7.2 Cord-connec
18、ted units .26B 8 Protection Against Corrosion .26B AUGUST 25, 2017 ELECTRIC PLUMBING ACCESSORIES - UL 1951 2AUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL 9 Accessibility of Uninsulated Live Parts, Film-Coated Wire, and Moving Parts 26B 10
19、 Field Connections .33 10.1 General .33 10.2 Equipment permanently connected electrically .34 10.3 Equipment cord connected 35 10.4 Strain relief 36 10.5 Bushing .36 11 Adhesives Used to Secure Parts .36 12 Mechanical Assembly .37 13 Current-Carrying Parts 38 14 Insulating Material 38 15 Internal Wi
20、ring 38 15.1 Mechanical protection .38 15.2 Splices and connections 39 16 Separation of Circuits .40 16.1 General .40 17 Grounding and Bonding .40 17.1 General .40 17.2 Grounding means 40 17.3 Terminals and leads 41 17.4 Grounding identication .41 17.5 Bonding .42 18 Lampholders .43 19 Motors .43 20
21、 Overcurrent- or Overload-Protective Devices .44 20.1 General .44 21 Capacitors .45 22 Switches and Controls .45 23 Controls End Product Test Parameters 46 23.1 General .46 23.2 Auxiliary controls .46 23.3 Operating controls (regulating controls) .46 23.4 Protective controls (limiting controls) 48 2
22、3.5 Controls using a temperature sensing device 49 24 Electronic Circuits 50 24.1 General .50 24.2 Electronic circuits evaluated to UL 60335-1 based requirements .50 25 Diaphragms, Gaskets, and Seals 50B 26 Spacings .50B 26A Clearance and creepage distances 52 26B Switch Mode Power Supplies 52B 26B.
23、1 Bridging components switch mode power supplies .52B 26B.2 Transformer insulation system .52B PROTECTION AGAINST INJURY TO PERSONS 27 General 52C 28 Sharp Edges .53 29 Enclosures and Guards 53 30 Materials .54 31 Rotating or Moving Members .54 32 Parts Subject to Pressure 55 33 Pressure-Relief Devi
24、ces .56 AUGUST 25, 2017 ELECTRIC PLUMBING ACCESSORIES - UL 1951 2BUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL 34 Switches, Controls, and Interlocks 58 AUGUST 25, 2017 ELECTRIC PLUMBING ACCESSORIES - UL 1951 2CUL COPYRIGHTED MATERIAL NOT
25、AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL AUGUST 25, 2017 ELECTRIC PLUMBING ACCESSORIES - UL 1951 2D No Text on This PageUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL 35 Printed-Wiring Boards .59 36 Mar
26、king 59 37 Permanence of Marking .60 PERFORMANCE 38 General 61 39 Power Input Test .61 40 Leakage Current Test .62 41 Leakage Current Following Humidity Conditioning Test 64 42 Insulation Resistance Following Humidity Conditioning Test 65 43 Continuity of Grounding Circuit Test .65 44 Starting-Curre
27、nt Test 66 45 Temperature Test .66 46 Dielectric Voltage-Withstand Test .70 47 Rain Test 71 48 Strain Relief Test .71 49 Accelerated Aging Test 74 50 Overload Test on Switches and Controls 74 51 Operational Test 75 52 Radiation Test 75 53 Abnormal Operation Test 75 53.1 General .75 53.2 Electronic c
28、omponents 76 53.3 Switch mode power supplies .76 53.4 Tests for circuits evaluated to UL 60335-1 based requirements 76A MANUFACTURING AND PRODUCTION TESTS 54 Dielectric Voltage-Withstand Test .76G 55 Grounding-Continuity Test .78 RATINGS 56 Details .78 MARKING 57 Details .79 58 Cautionary Markings 8
29、0 PART II SPECIFIC EQUIPMENT COMMERCIAL PEDICURE SPAS 59 General 81 60 Scope .81 61 Construction .81 61.1 General .81 62 Performance .82 62.1 Temperature Test 82 63 Markings .82 FEBRUARY 21, 2017 ELECTRIC PLUMBING ACCESSORIES - UL 1951 3UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION
30、 OR DISTRIBUTION WITHOUT PERMISSION FROM UL 63.1 Details 82 TOILETS WITH ELECTRIC FLUSHING FEATURES 64 General 82 65 Construction .83 65.1 General .83 66 Performance .83 66.1 Temperature test .83 67 Markings .83 67.1 Details .83 AUGUST 25, 2017 ELECTRIC PLUMBING ACCESSORIES - UL 1951 4UL COPYRIGHTED
31、 MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL PART 1 ALL EQUIPMENT INTRODUCTION 1 Scope 1.1 These requirements cover equipment connected to or used with plumbing in commercial or household locations. Examples of equipment covered by these requirements a
32、re irrigation equipment, sprinkler controls, pedicure spas, water controls located in kitchens and bathrooms, electric faucets, toilets and toilet ushing systems. All equipment is intended for installation and use in accordance with the National Electrical Code, NFPA 70, and is rated 600 volts or le
33、ss. 1.2 These requirements do not cover pumps, dishwashers, washing machines, or other equipment connected to plumbing that is covered by individual requirements. 1.3 These requirements do not cover refrigeration systems or controls that regulate water temperature, or equipment for use in hazardous
34、locations as dened in the National Electrical Code, NFPA 70. 2 Units of Measurement 2.1 Values stated without parentheses are the requirement. Values in parentheses are explanatory or approximate information. 2.2 Unless indicated otherwise, all voltage and current values are rms and wattage values a
35、re average power. 3 Undated References 3.1 Any undated reference to a code or standard appearing in the requirements of this standard shall be interpreted as referring to the latest edition of that code or standard. 4 Glossary 4.1 For the purpose of this standard the following denitions apply. 4.2 F
36、IELD-WIRING TERMINAL A terminal to which power supply (including equipment grounding) or control connection will be made in the eld when the product is installed as intended. If the wire, to be connected to the terminal, is provided as part of the unit and a pressure terminal, connector, soldering l
37、ug, soldered loop, crimped eyelet, or other means for making the connection is factory-assembled to the wire, it is not a eld wiring terminal. 4.2.1 CAPACITOR, CLASS X Capacitor or RC unit of a type suitable for use in situations where failure of the capacitor or RC unit would not lead to danger of
38、electrical shock but could result in a risk of re. Examples would be units connected phase to phase or phase to neutral. AUGUST 25, 2017 ELECTRIC PLUMBING ACCESSORIES - UL 1951 5UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL 4.2.2 CAPACITOR
39、, CLASS Y Capacitor or RC unit of a type suitable for use in situations where failure of the capacitor could lead to danger of electric shock. Examples would be capacitors connected across the primary and secondary circuits where electrical isolation is required to prevent an electric shock or betwe
40、en hazardous live parts and accessible parts. 4.3 CONTROLS, AUTOMATIC ACTION A device in which the transmission and operation of at least one function are produced by initiation which is not the result of manual actuation. 4.4 CONTROL, AUXILIARY A device that provides a functional utility but is not
41、 relied on as an operational or protective control. The failure of an auxiliary control generally does not cause the operation of a protective control. An example of an auxiliary control is a safety related control where other controls are being relied upon during testing for the safety function. Th
42、e auxiliary control might more likely function in actual use but for test purposes, it is bypassed. 4.5 CONTROL, MANUAL A device that requires direct human interaction to activate or test the control. 4.6 CONTROL, OPERATING A device that starts or regulates the operation of an appliance during norma
43、l operation. The failure of an operational control generally causes the operation of a protective control. An example of an operating control is a temperature regulating control a control that maintains the temperature of water to a user-determined level. 4.7 CONTROL, PROTECTIVE A device or assembly
44、 of devices, the operation of which is intended to reduce the risk of re, electric shock, or injury to persons during normal and reasonably anticipated abnormal operation of the appliance whereby during the evaluation of the protective control/circuit, the protective functions are veried under norma
45、l and single-fault conditions of the control. For example, a thermal cutout/limiter, or any other control/circuit relied upon for normal and abnormal conditions, is considered a protective control. 4.8 CONTROL, TYPE 2 ACTION The actuation of an automatic control of 2.1.1 for which the manufacturing
46、deviation and the drift of its operating value, operating time, or operating sequence have been declared and tested under this end product standard. 4.9 CONTROL, TYPE (2) D.H ACTION This action is applicable to manual controls (described in 2.1.4 above). A Type D.H action shall be so designed that t
47、he contacts cannot be prevented from opening and which may automatically reset to the closed position if the reset means is held in the reset position. The control shall not reset automatically at any temperature above -35 C with the reset mechanism in the normal position. 4.10 CONTROL, TYPE (2) D.J
48、 ACTION This action is applicable to manual controls (described in 4.6 above). A Type D.J action shall be so designed that the contacts cannot be prevented from opening, and the control is not permitted to function as an automatic reset device if the reset means is held in the reset position. The co
49、ntrol shall not reset automatically at any temperature above -35 C. 4.10.1 DANGEROUS MALFUNCTION Unintended operation of the appliance that may impair safety. Operating Control functions whose failure would result in a Dangerous Malfunction would be considered Safety Critical Functions. Note Control functions whose failure might result in a Dangerous Malfunction would include: a) Unexpected operation of the appliance where the operation would result in risk of electric shock, re or me
