ANSI UL 1261-2016 UL Standard for Safety Electric Water Heaters for Pools and Tubs (Sixth Edition Reprint with revisions through and including September 1 2017).pdf

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1、UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL UL 1261 Electric Water Heaters for Pools and Tubs STANDARD FOR SAFETYUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM ULUL COPYRIGHTED MAT

2、ERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL UL Standard for Safety for Electric Water Heaters for Pools and Tubs, UL 1261 Sixth Edition, Dated September 2, 2016 Summary of Topics This revision of ANSI/UL 1261 is being issued to clarify button or coin cell

3、 batteries of lithium technologies requirements. 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 r

4、ights 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 as is without warranty of any kind, either expr

5、essed or implied, 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

6、 out of the use 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 e

7、lectronic versions of ULs Standards for Safety agree to defend, indemnify, and hold UL harmless from and against any loss, expense, liability, damage, claim, or judgment (including reasonable attorneys fees) resulting from any error or deviation introduced while purchaser is storing an electronic St

8、andard on the purchasers computer system. SEPTEMBER 1, 2017 UL 1261 tr1UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL SEPTEMBER 1, 2017 UL 1261 tr2 No Text on This PageUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTR

9、IBUTION WITHOUT PERMISSION FROM UL SEPTEMBER 2, 2016 (Title Page Reprinted: September 1, 2017) 1 UL 1261 Standard for Electric Water Heaters for Pools and Tubs First Edition May, 1977 Second Edition March, 1981 Third Edition November, 1992 Fourth Edition January, 1996 Fifth Edition March, 2001 Sixth

10、 Edition September 2, 2016 This ANSI/UL Standard for Safety consists of the Sixth Edition including revisions through September 1, 2017. The most recent designation of ANSI/UL 1261 as an American National Standard (ANSI) occurred on September 1, 2017. ANSI approval for a standard does not include th

11、e 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 Standards for Safe

12、ty 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 LABORATORIES INC. ANSI

13、/UL 1261-2017UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL SEPTEMBER 1, 2017 ELECTRIC WATER HEATERS FOR POOLS AND TUBS - UL 1261 2 No Text on This PageUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT

14、PERMISSION FROM UL CONTENTS INTRODUCTION 1 Scope .7 2 Glossary .7 3 Safety Critical Functions .8 CONSTRUCTION 4 Component Specications 9 4.1 General .9 4.2 Quick-connect wire connectors 10 4.3 Terminal blocks .10 4.4 Wire connectors .10 4.5 Boxes and raceways .11 4.6 Overcurrent protection .11 4.7 S

15、witches .11 4.8 Relays and contactors .13 4.9 Transformers .13 4.10 Printed wiring boards .13 4.11 Temperature sensing thermistor devices 14 4.12 Button or coin cell batteries of lithium technologies .14 5 Frame and Enclosure 14 5.1 General 14 5.2 Protection of combustible materials outside the encl

16、osure 15 5.3 Ventilating openings .15 5.4 Thickness of enclosure materials 16 5.5 Openings .17 5.6 Accessibility of uninsulated live parts 19 5.7 Button or coin cell batteries of lithium technologies 23 6 Metal in Contact With Water 23 7 Field-Wiring Connections .24 7.1 General 24 7.2 Leads and term

17、inals .25 8 Field Wiring Compartments .27 9 Leakage Current Collectors .28 10 Equipment Grounding .29 11 Bonding For Grounding 29 12 Live or Current-Carrying Parts 30 12.1 General .30 12.2 Current-carrying parts .30 13 Enclosure of Live Parts and Wiring .30 14 Internal Wiring 31 14.1 General .31 14.

18、2 Wiring methods 32 14.3 Splices and connections 32 15 Heating Elements .33 16 Electrical Insulation .33 17 Thermal Insulation 34 18 Overcurrent Protection 34 18.1 General .34 SEPTEMBER 1, 2017 ELECTRIC WATER HEATERS FOR POOLS AND TUBS - UL 1261 2AUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER R

19、EPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL 18.2 Receptacle, transformer, lampholder protection 34 19 Temperature Regulating Controls .35 19.1 General .35 19.2 Construction .35 20 Temperature-Limiting Controls 36 21 Electrical Spacings 38 22 Clearance and Creepage Distances .40 23 Protect

20、ion Against Risk of Physical Injury 41 23.1 General .41 23.2 Maximum surface temperatures 41 23.3 Stability .41 24 Pressure Vessels and Parts Subject to Pressure .42 25 Units Intended for Outdoor Use .42 25.1 General .42 25.2 Enclosure .42 25.3 Corrosion resistance 43 PERFORMANCE 26 Power Input 45 2

21、7 Normal Temperature 45 28 Water Temperature .48 29 Dielectric Voltage-Withstand .48 30 Abnormal Operation .49 31 Insulation Resistance as a Result of Moisture 49 32 Resistance to Rain 49 33 Hydrostatic Pressure 53 34 Metal Coating Thickness .53 35 Endurance of Temperature-Regulating and -Limiting C

22、ontrols 55 36 Leakage Current in Water .55 37 Stability Test .58 MANUFACTURING AND PRODUCTION-LINE TEST 38 Production-Line Dielectric Voltage-Withstand .58 38.1 General .58 38.2 Test equipment 59 RATINGS 39 Details .60 MARKINGS 40 Details .61 40.1 Identication and electrical ratings 61 40.2 Temperat

23、ures for eld-wiring conductors 62 40.3 Marking of eld terminals 63 41 Permanence .63 41.1 General .63 41.2 Oven aging 64 41.3 Immersion .64 41.4 Standard atmosphere .64 SEPTEMBER 1, 2017 ELECTRIC WATER HEATERS FOR POOLS AND TUBS - UL 1261 2BUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUC

24、TION OR DISTRIBUTION WITHOUT PERMISSION FROM UL 41.5 Evaluation of adhesive labels 64 SEPTEMBER 1, 2017 ELECTRIC WATER HEATERS FOR POOLS AND TUBS - UL 1261 3UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL SEPTEMBER 1, 2017 ELECTRIC WATER HEA

25、TERS FOR POOLS AND TUBS - UL 1261 4 No Text on This PageUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL INSTRUCTIONS 42 Installation .65 43 Use Instructions 66 SUPPLEMENT SA - REQUIREMENTS FOR THE EVALUATION OF ELECTRONIC CIRCUITS INTRODUCTI

26、ON SA1 Scope SA1 SA2 General SA1 SA3 Glossary SA1 CONSTRUCTION SA4 Components SA3 SA4.1 Capacitors .SA3 SA4.2 Switch mode power supplies .SA3 SA5 Identication of Safety Critical Circuit Functions .SA3 SA5.1 General SA3 SA5.2 Protective electronic circuits SA4 SA5.3 Operating circuits that mitigate a

27、 dangerous malfunction of the appliance SA4 SA6 Evaluation of the Different Types of Electronic Circuits .SA4 SA7 Circuits that Provide Safety Critical Functions SA4 PERFORMANCE SA8 General Conditions for the Tests SA5 SA8.1 Details .SA5 SA8.2 Intentionally weak parts SA5 SA8.3 Test results determin

28、ed by overcurrent protection operation SA6 SA9 Low-Power Circuit Determination SA6 SA10 Abnormal Operation and Fault Tests SA8 SA11 Overload Protection (Transformer and Associated Circuits) Test .SA9 SA12 Switch Mode Power Supply Overload Test .SA10 SA13 Programmable Component Reduced Supply Voltage

29、 Test SA11 SA14 Electromagnetic Compatibility (EMC) Requirements Immunity .SA11 SUPPLEMENT SB - CONTROLS EVALUATED TO UL 508 AND UL 873 INTRODUCTION SB1 Scope SB1 SB2 General SB1 SEPTEMBER 2, 2016 ELECTRIC WATER HEATERS FOR POOLS AND TUBS - UL 1261 5UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER

30、 REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL CONSTRUCTION SB3 General SB1 SEPTEMBER 2, 2016 ELECTRIC WATER HEATERS FOR POOLS AND TUBS - UL 1261 6UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL INTRODUCTION 1 Scope 1.1 These requi

31、rements cover permanently installed electric water heaters, rated 600 volts or less, for heating the water supplied through plumbing to separately heated public or private pools or tubs, in which swimming, wading, bathing, or partial or total immersion of persons, may be involved. Equipment covered

32、may or may not be intended for use with external water circulating equipment, and is intended for installation in accordance with the National Electrical Code, NFPA 70. 1.2 These requirements do not cover household storage tank water heaters or other equipment covered by individual requirements. 2 G

33、lossary 2.1 For the purpose of this standard the following denitions apply. 2.2 ACTUATION Movement of the actuating member of the control by the user, by hand, by foot, or by any other human activity. 2.3 CONTROL, AUTOMATIC ACTION A device in which the transmission and operation of at least one func

34、tion is produced by initiation which is not the result of manual actuation. 2.4 CONTROL, LIMITING A control intended to limit the operation of the heater to a water temperature of 70C (158F) under all conditions, including breakdown of any or all operating controls. 2.5 CONTROL, MANUAL A device that

35、 requires direct human interaction to activate or test the control. 2.6 CONTROL, OPERATING A device that starts or regulates the operation of an appliance during normal operation. The failure of an operational control generally causes the operation of a protective control. An example of an operating

36、 control is a temperature regulating control a control that maintains the temperature of the spa water to a user-determined level. 2.7 CONTROL, PROTECTIVE A device, the operation of which is intended to reduce the risk of electric shock, re, or injury to persons during normal or abnormal operation o

37、f the appliance. During the evaluation of the protective control / circuit, the protective functions are veried under normal and single-fault conditions of the control. 2.8 CONTROL, TYPE 2 ACTION The actuation of an automatic control (see 2.3) for which the manufacturing deviation and the drift of i

38、ts operating value, operating time, or operating sequence have been declared and tested under the Standard for Automatic Electrical Controls Part 1: General Requirements, UL 60730-1. 2.9 CONTROL, TYPE 2.D.H ACTION This action is applicable to manual controls (see 2.5). The automatic action (i.e. tri

39、pping of the control) is independent of the manipulation or position of the manual reset/adjustment mechanism. The manipulation of the manual adjustment means will not allow for the reverse operation (resetting of a tripped control), even momentarily, while the excess or fault condition persists. Th

40、is action is also referred to as trip-free action. The action of the control is such that the reverse operation (resetting) is possible if the manual reset mechanism is held in the reset position i.e. the control will function as an automatic control if the reset button is held in the reset position

41、. The control shall not reset automatically at any temperature above -35C (-31F) with the reset mechanism in the normal position. SEPTEMBER 2, 2016 ELECTRIC WATER HEATERS FOR POOLS AND TUBS - UL 1261 7UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION

42、FROM UL 2.10 CONTROL, TYPE 2.D.J ACTION This action is applicable to manual controls (see 2.5). The automatic action (i.e. tripping of the control) is independent of the manipulation or position of the manual reset/adjustment mechanism. The manipulation of the manual adjustment means will not allow

43、for the reverse operation (resetting of the control), even momentarily, while the excess or fault condition persists. This action is also referred to as trip-free action. 2.11 CONTROLLED ENVIRONMENT An environment that is relatively free from conductive contaminants, such as dust and carbon particle

44、s, and that is protected against humidity and condensation. A controlled environment may be provided by a hermetically sealed enclosure, encapsulation, or a conformal coating. 2.12 HOT TUB A tub intended for partial or total immersion of persons in heated water. 2.13 LOW-VOLTAGE CIRCUITS A low-volta

45、ge circuit is one involving a potential of not more than 30 volts rms (42.4 volts peak) supplied by a primary battery, by a standard Class 2 transformer, or by a combination of a transformer and a xed impedance that, as a unit, complies with all of the performance requirements for a Class 2 transfor

46、mer. A circuit derived from a source of supply at line voltage by connecting resistance in series with the supply as a means of limiting the voltage and current is not considered to be a low-voltage circuit. 2.14 OPERATING TEMPERATURE VALUE Value of temperature at which the temperature sensing contr

47、ol operates on a rise or fall of the temperature. 2.15 SAFETY CRITICAL FUNCTION Control, protection and monitoring functions which are being relied upon to reduce the risk of re, electric shock or casualty hazards. 2.16 TEMPERATURE SETTING BY THE USER Any selection of an operating temperature value

48、by actuation performed by the user. 3 Safety Critical Functions 3.1 Any function involved in the control, protection, and monitoring of safety-related attributes of a unit whereby a loss/malfunction of its functionality would represent an unacceptable risk of re, electric shock, or casualty hazards

49、would be considered a Safety Critical Function. 3.2 Electronic circuits that manage a Safety Critical Function shall be: a) Reliable as dened as being able to maintain the Safety Critical Function in the event of single dened component faults and b) Not susceptible to electromagnetic environmental stresses encountered in the anticipated environments of the appliance. 3.3 Electronic circuits managing Safety Critical Functions shall comply with: a) Supplement SA; or b) The