1、UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL UL 1484 Residential Gas Detectors STANDARD FOR SAFETYUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM ULUL COPYRIGHTED MATERIAL NOT AUTHOR
2、IZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL UL Standard for Safety for Residential Gas Detectors, UL 1484 Fifth Edition, Dated April 20, 2016 Summary of Topics This revision of ANSI/UL 1484 is being issued to update the title page to reect reaffirmation of ANSI approval.
3、 Text that has been changed in any manner or impacted by ULs electronic publishing system is marked with a vertical line in the margin. The revisions are substantially in accordance with Proposal(s) on this subject dated June 9, 2017 All rights reserved. No part of this publication may be reproduced
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8、484 tr1UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL AUGUST 4, 2017 UL 1484 tr2 No Text on This PageUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL APRIL 20, 2016 (Title Page Repri
9、nted: August 4, 2017) 1 UL 1484 Standard for Residential Gas Detectors First Edition June, 1983 Second Edition January, 1991 Third Edition November, 1994 Fourth Edition December, 2000 Fifth Edition April 20, 2016 This ANSI/UL Standard for Safety consists of the Fifth Edition including revisions thro
10、ugh August 4, 2017. The most recent designation of ANSI/UL 1484 as a Reaffirmed American National Standard (ANS) occurred on August 4, 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
11、 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 Safety are copyrighted by UL. Neither a printed nor electronic copy of a Standard should be altered in any way. All
12、 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/UL 1484-2008 (R2017)UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PE
13、RMISSION FROM UL APRIL 20, 2016 RESIDENTIAL GAS DETECTORS - UL 1484 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 Components 7 3 Units of Measurement .8 4 Undated References 8 5 Term
14、inology 8 6 Glossary .8 7 Detector Reliability Prediction .9 8 Lifetime .10 9 Installation and Operating Instructions 10 CONSTRUCTION ASSEMBLY 10 Product Assembly 11 11 Detection-Threshold Adjustment 11 12 Supplementary Signaling Feature .11 13 Sharp Edges .11 14 Enclosures .12 14.1 General .12 14.2
15、 Electrical component enclosures .12 14.3 Sheet metal enclosures .12 14.4 Cast metal enclosures 13 14.5 Nonmetallic enclosures .13 14.6 Product mounting 14 14.7 Ventilating openings 14 14.8 Screens and expanded metal 14 14.9 Glass panels 15 15 Protection Against Corrosion .16 FIELD-WIRING CONNECTION
16、S 16 General 16 17 Cord-Connected Products .17 18 Permanently Connected Products .17 18.1 General .17 18.2 Field-wiring compartment 18 18.3 Field-wiring terminals .18 18.4 Field-wiring leads .18 18.5 Grounded supply terminals and leads .19 19 Supplementary Signaling Circuits .19 20 Grounding .19 APR
17、IL 20, 2016 RESIDENTIAL GAS DETECTORS - UL 1484 3UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL INTERNAL WIRING 21 General 20 22 Wiring Methods .21 22.1 Wireways 21 22.2 Splices 21 22.3 Bushings 21 22.4 Barriers .22 23 Separation of Circuit
18、s .22 24 Bonding for Grounding 22 ELECTRICAL COMPONENTS 25 General 23 25.1 Mounting of components 23 25.2 Insulating materials .24 25.3 Uninsulated live parts .24 25.4 Current-carrying parts .25 26 Lampholders and Lamps 25 27 Printed-Wiring Boards .26 28 Protective Devices 26 29 Switches .26 30 Tran
19、sformers .26 SPACINGS 31 General 27 PERFORMANCE GENERAL 32 Samples and Data for Test 29 33 Test Voltages 31 TESTS 34 Normal Operation Test 32 35 Input Measurement Test .32 36 Electrical Supervision Test .32 36.1 General .32 36.2 Power loss 33 36.3 Power interruption 33 36.4 Silencing means .33 36.5
20、Component failure 33 37 Temperature Test .34 38 Dielectric Voltage-Withstand Test .37 39 Abnormal-Operation Test 37 40 Overload Test 38 40.1 Detector .38 40.2 Separately energized circuits 38 41 Endurance Test 38 41.1 Detector .38 APRIL 20, 2016 RESIDENTIAL GAS DETECTORS - UL 1484 4UL COPYRIGHTED MA
21、TERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL 41.2 Separately energized circuits 39 41.3 Audible signaling appliance 39 42 Audibility Test 39 43 Leakage Current Test .40 44 Tests of Thermoplastic Materials .42 44.1 General .42 44.2 Accelerated air-oven agi
22、ng test 42 44.3 Flame test .42 45 Power Supply Tests .43 45.1 General .43 45.2 VA capacity .43 45.3 Burnout test .43 46 Polarity Reversal Test .43 47 Electric Shock Current Test 44 48 Ignition Test 49 49 Detection Threshold Tests .50 49.1 General .50 49.2 Overvoltage test .53 49.3 Undervoltage test
23、53 49.4 Variable ambient test all gas detectors 53 49.5 Variable ambient test RV gas detectors .54 49.6 Humidity test .54 49.7 Effect of shipping and storage .54 49.8 Transient tests .55 49.9 Stability tests 59 49.10 Jarring test .60 49.11 Static discharge test .60 49.12 Dust test .61 49.13 Vibratio
24、n test all gas detectors 61 49.14 Vibration test RV gas detectors .62 49.15 Corrosion test all gas detectors .62 49.16 Corrosion (salt spray) test RV gas detectors 63 49.17 Contamination test (cooking by-products) all gas detectors .63 50 Permanence of Marking Tests 65 51 Strain-Relief Test .65 51.1
25、 General .65 51.2 Power supply cord 65 51.3 Field-wiring leads .65 MANUFACTURING AND PRODUCTION TESTS 52 General 66 53 Production-Line Detection-Threshold Calibration Tests 66 54 Production-Line Dielectric Voltage-Withstand Test 66 55 Production-Line Grounding Continuity Tests 67 MARKING 56 General
26、67 INSTRUCTIONS 57 General 68 APRIL 20, 2016 RESIDENTIAL GAS DETECTORS - UL 1484 5UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL SUPPLEMENT SA - RELIABILITY AND FAILURE RATE DETERMINATION INFORMATION GENERAL SA1 Instructions for Determining
27、 a Reliability Prediction for Gas Detectors SA1 SA2 Methods of Determining Failure Rate SA2 SA3 Maximum Detector Failure Rates .SA12 CRITERIA FOR ACCEPTANCE OF MICROELECTRONIC DEVICES SA4 General .SA13 SA5 Quality-Assurance-Screening Program SA13 SA6 Determination of Failure Rate Number Supplemented
28、 by Burn-In Test SA15 SA6.1 General .SA15 SA6.2 Determination sequence SA15 SA6.3 Test calculations and procedures SA15 SA6.4 Test conditions SA17 SA6.5 Failure-rate number calculation SA17 APPENDIX A Standards for ComponentsA1 APRIL 20, 2016 RESIDENTIAL GAS DETECTORS - UL 1484 6UL COPYRIGHTED MATER
29、IAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL INTRODUCTION 1 Scope 1.1 These requirements cover electrically operated gas detectors intended for installation in residential occupancies and recreational vehicles (RVs). 1.2 These requirements cover gas detector
30、s intended to detect ammable gases such as propane and natural gas. 1.3 These requirements also cover all remote accessories that may be connected to a gas detector. 1.4 These requirements do not cover gas detectors for use in hazardous locations, as dened by the National Electrical Code, NFPA 70, f
31、or industrial or commercial use, or for use as smoke and re detectors. 2 Components 2.1 Except as indicated in 2.2, a component of a product covered by this standard shall comply with the requirements for that component. See Appendix A for a list of standards covering components used in the products
32、 covered by this standard. 2.2 A component is not required to comply with a specic requirement that: a) Involves a feature or characteristic not required in the application of the component in the product covered by this standard; or b) Is superseded by a requirement in this standard. 2.3 A componen
33、t shall be used in accordance with its rating established for the intended conditions of use. 2.4 Specic components are incomplete in construction features or restricted in performance capabilities. Such components are intended for use only under limited conditions, such as certain temperatures not
34、exceeding specied limits, and shall be used only under those specic conditions. APRIL 20, 2016 RESIDENTIAL GAS DETECTORS - UL 1484 7UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL 3 Units of Measurement 3.1 Values stated without parentheses
35、are the requirement. Values in parentheses are explanatory or approximate information. 4 Undated References 4.1 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. 5 Terminology 5
36、.1 The term product as used in these requirements refers to all or any part of a product covered by these requirements unless specically noted otherwise. 6 Glossary 6.1 For the purpose of this standard the following denitions apply. 6.2 ALARM SIGNAL A signal intended to indicate a gas concentration
37、in excess of the preset detector alarm level. 6.3 COMPONENTS: a) Nonreliable Component A component that is expected to fail and be periodically replaced and the failure of which is supervised. Typical examples of such components include incandescent lamps, electronic tube heaters, and functional hea
38、ting elements. b) Reliable Component A component that is not expected to fail or be periodically replaced and is not supervised. A reliable component shall have a predicted failure rate of 3.5 or fewer failures per million hours. 6.4 DETECTION THRESHOLD The minimum gas concentration at which the det
39、ector will alarm. 6.5 DETECTOR, GAS A self-contained alarm device that consists of an assembly of electrical components including an element to detect gas concentration, an alarm sounding appliance, and provision for connection to a power supply source by either splice leads or a cord and plug arran
40、gement. Terminals may be included for connection to a remote audible signaling appliance or accessory. 6.6 ELECTRICAL CIRCUITS: a) High-Voltage Circuit A circuit involving a potential of not more than 600 volts and having circuit characteristics in excess of those of a low-voltage circuit. b) Low-Vo
41、ltage Circuit A circuit involving a potential of not more than 30 volts AC, rms, 42.4 volts DC or AC peak and: 1) Supplied by an NEC Class 2 transformer, or by a transformer and xed impedance each of which, as a unit, is in compliance with the requirements for a Class 2 transformer; or APRIL 20, 201
42、6 RESIDENTIAL GAS DETECTORS - UL 1484 8UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL 2) Limited to a maximum of 100 volt-amperes. A circuit derived from a source of supply classied as a high-voltage circuit, by connecting resistance in ser
43、ies with the supply classied as a high-voltage circuit, is not considered to be a low-voltage circuit. 6.7 END-OF-LIFE-SIGNAL An audible signal, differing from the alarm signal, intended to indicate that the device has reached the end of its useful life and should be replaced. It is permitted for th
44、e audible component of the signal to be of the same format as a trouble signal, provided a visual indicator is employed to differentiate between the end-of-life and other trouble conditions. The end-of-life signal shall repeat once every 30 60 seconds 10 percent. 6.8 LOWER EXPLOSIVE LIMIT (LEL) The
45、minimum concentration of a gas in air which, if ignited, will propagate ame throughout the gas-air mixture independently of continued application of the source of ignition; expressed as a percent by volume of gas in air. 6.9 NORMAL STANDBY CONDITION The operating condition of the detector as intende
46、d by the manufacturer in which the detector is ready for alarm-signaling performance. 6.10 SPECIFIED LIFETIME A continuous period of time specied by the manufacturer, during which the alarm meets the requirements of this standard. The manufacturer will specify the start date of the period as either
47、the date of manufacture of the fully assembled unit in its nal enclosure, or the date the unit is placed into service. 6.11 SWITCHING DEVICE A device designed to close and/or open one or more electrical circuits. 6.12 TROUBLE SIGNAL A visual or audible signal intended to indicate a fault or trouble
48、condition, such as an open or shorted condition of a component in the device or an open or ground in the connected wiring. 7 Detector Reliability Prediction 7.1 A detector unit shall be intended for a failure rate of not more than: a) 4.0 failures per million hours as calculated by a full part stres
49、s analysis prediction as described in Section 5.1 of MIL-HBK 217 or b) 3.5 failures per million hours as calculated by a simplied parts count-reliability prediction as described in Section 5.2 of MIL-HBK 217, or equivalent. A Ground Fixed (G F ) environment is to be used for all calculations. If equivalent data is available from the manufacturer, it may be used in lieu of the projected data for the purpose of determining acceptable reliability. 7.2 Any component, the fa
