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 new edition of ANSI/UL 1261 was issued to incorporate revisions to clar

3、ify existing text, add terminology, update standard references, replace obsolete standard references and generally reect current practice. The revised requirements are substantially in accordance with Proposal(s) on this subject dated June 24, 2016. All rights reserved. No part of this publication m

4、ay 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 implied, including but not limited t

5、o, 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 use of or the inability to use th

6、is 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 versions of ULs Standards for Safet

7、y 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 Standard on the purchasers computer system. SEP

8、TEMBER 2, 2016 UL 1261 tr1UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL SEPTEMBER 2, 2016 UL 1261 tr2 No Text on This PageUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL SEPTEMBER

9、2, 2016 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 Edition September 2, 2016 This ANSI/UL Standard for Safety consists of the Sixth Editi

10、on. The most recent designation of ANSI/UL 1261 as an American National Standard (ANSI) occurred on September 2, 2016. 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 U

11、L at any time. Proposals should be submitted via a Proposal Request in ULs On-Line Collaborative Standards Development System (CSDS) at http:/. 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 a

12、ll copyrights, ownerships, and rights regarding those Standards shall remain the sole and exclusive property of UL. COPYRIGHT 2016 UNDERWRITERS LABORATORIES INC. ANSI/UL 1261-2016UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL SEPTEMBER 2, 2

13、016 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 PERMISSION FROM UL CONTENTS INTRODUCTION 1 Scope .7 2 Glossary .7 3 Safety Critical Functions .8 CONSTRUCTION 4 Component Specications

14、 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 Switches .11 4.8 Relays and contactors .13 4.9 Transformers .13 4.10 Printed wiring boards .13 4.11 Temperature sensing thermistor devi

15、ces 14 5 Frame and Enclosure 14 5.1 General 14 5.2 Protection of combustible materials outside the enclosure 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 6 Metal in Contact With Water 23 7 Field-Wiring Connect

16、ions .24 7.1 General 24 7.2 Leads and terminals .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

17、14 Internal Wiring 31 14.1 General .31 14.2 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 18.2 Receptacle, transformer, lampholder protection 34 19 Temperature Regulating C

18、ontrols .35 SEPTEMBER 2, 2016 ELECTRIC WATER HEATERS FOR POOLS AND TUBS - UL 1261 3UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL 19.1 General .35 19.2 Construction .35 20 Temperature-Limiting Controls 36 21 Electrical Spacings 38 22 Cleara

19、nce and Creepage Distances .40 23 Protection 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 resi

20、stance 43 PERFORMANCE 26 Power Input 45 27 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

21、of Temperature-Regulating and -Limiting Controls 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 Identicatio

22、n and electrical ratings 61 40.2 Temperatures 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 41.5 Evaluation of adhesive labels 64 SEPTEMBER 2, 2016 ELECTRIC WATER HEATERS FOR POOLS A

23、ND TUBS - UL 1261 4UL 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 INTRODUCTION SA1 Scope SA1 SA2 General SA1 SA3

24、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 dangerous malfunction of the applian

25、ce 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 determined by overcurrent protection operatio

26、n 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 Test SA11 SA14 Electromagnetic Compa

27、tibility (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 REPRODUCTION OR DISTRIBUTION WITHOUT

28、 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 requirements cover permanently installed e

29、lectric 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 may or may not be intended for use wi

30、th 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 Glossary 2.1 For the purpose of this s

31、tandard 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 function is produced by initiation which

32、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 requires direct human interaction to

33、 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 control is a temperature regulating

34、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 of the appliance. During the evaluatio

35、n 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 its operating value, operating time, o

36、r 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. tripping of the control) is independent

37、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. This action is also referred to as trip

38、-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. The control shall not reset automat

39、ically 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 FROM UL 2.10 CONTROL, TYPE 2.D.J ACTI

40、ON 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 for the reverse operation (resetting

41、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 particles, and that is protected against humi

42、dity 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-voltage circuit is one involving a potenti

43、al 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 transformer. A circuit derived from a source

44、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 control operates on a rise or fall of the

45、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 by actuation performed by the user. 3

46、 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 would be considered a Safety Critical

47、 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 anticipate

48、d environments of the appliance. 3.3 Electronic circuits managing Safety Critical Functions shall comply with: a) Supplement SA; or b) The Standard for Automatic Electrical Controls Part 1: General Requirements, UL 60730-1 and its Part 2s as specied in this standard. The function shall be considered

49、 Class B; or c) The Standard for Temperature-Indicating and -Regulating Equipment, UL 873, and the Standard for Tests for Safety-Related Controls Employing Solid-State Devices, UL 991, requirements specied in Supplement SB. SEPTEMBER 2, 2016 ELECTRIC WATER HEATERS FOR POOLS AND TUBS - UL 1261 8UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL 3.4 Functions specied in Table 3.1 represent the common safety criti