1、UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL UL 2044 Commercial Closed-Circuit Television EquipmentUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM ULUL COPYRIGHTED MATERIAL NOT AUTHO
2、RIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL UL Standard for Safety for Commercial Closed-Circuit Television Equipment, UL 2044 Third Edition, Dated September 15, 2008 SUMMARY OF TOPICS This revision to UL 2044 is being issued to remove the reference to the withdrawal da
3、te of UL 873 and to address universal upkeep of UL Standards for Safety. These revisions are considered to be non-substantive and not subject to ULs STP process. Text that has been changed in any manner or impacted by ULs electronic publishing system is marked with a vertical line in the margin. Cha
4、nges in requirements are marked with a vertical line in the margin and are followed by an effective date note indicating the date of publication or the date on which the changed requirement becomes effective. All rights reserved. No part of this publication may be reproduced, stored in a retrieval s
5、ystem, 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 to, the implied warranties of merchantabil
6、ity 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 this Standard, even if UL or an authorized
7、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 Safety agree to defend, indemnify, and hold UL
8、 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. The requirements in this Standard are now in
9、 effect, except for those paragraphs, sections, tables, gures, and/or other elements of the Standard having future effective dates as indicated in the note following the affected item. The prior text for requirements that have been revised and that have a future effective date are located after the
10、Standard, and are preceded by a SUPERSEDED REQUIREMENTS notice. MARCH 9, 2015 UL 2044 tr1UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL MARCH 9, 2015 UL 2044 tr2 No Text on This PageUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODU
11、CTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL SEPTEMBER 15, 2008 (Title Page Reprinted: March 9, 2015) 1 UL 2044 Standard for Commercial Closed-Circuit Television Equipment First Edition June, 1993 Second Edition June, 1997 Third Edition September 15, 2008 This ANSI/UL Standard for Safety consist
12、s of the Third Edition including revisions through March 9, 2015. The most recent designation of ANSI/UL 2044 as a Reaffirmed American National Standard (ANS) occurred on October 18, 2012. ANSI approval for a standard does not include the Cover Page, Transmittal Pages, Title Page, or effective date
13、information. 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 http:/. ULs Standards for Safety are copyrighted by UL. Neither a
14、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 2015 UNDERWRITERS LABORATORIES INC. ANSI/UL 2044-2004 (R2012)UL COPYRIGHTED
15、MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL MARCH 9, 2015 COMMERCIAL CLOSED-CIRCUIT TELEVISION EQUIPMENT - UL 2044 2 No Text on This PageUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL CONTENTS
16、 INTRODUCTION 1 Scope .7 2 General 8 2.1 Components .8 2.2 Undated references .8 2.3 Terminology .8 3 Glossary .9 CONSTRUCTION 4 General .13 5 Corrosion Protection .13 6 Outdoor-Use Products 13 7 Multiple-Supply-Circuit-Voltage Products 14 8 Material Flammability Classications .14 9 Spacings 16 10 P
17、roduct and Accessory Assembly .17 11 Adhesive-Backed Conductive Parts and Labels .18 12 Injury to Persons .18 13 Fire .19 14 Low-Voltage, Limited-Energy Circuits 19 15 Electric Shock 20 15.1 General .20 15.2 Transient and stored energy electric shock 23 16 Enclosures .24 17 User-Servicing and Replac
18、ement of Parts .30 18 Power-Supply Connections 31 19 Supply Connections Permanently Connected Products 33 19.1 General .33 19.2 Separation of circuits .34 19.3 Wiring terminals 35 20 Polarization 36 21 Grounding .37 21.1 Continuity .37 21.2 Basic insulation 37 21.3 Supplementary insulation 37 21.4 R
19、einforced insulation .38 21.5 Grounding .38 21.6 Optional grounding .39 21.7 Permanently connected products 39 22 Auxiliary Power Connections .40 23 Devices and Applications 41 24 Protective Devices 44 25 Lasers .45 26 Transformers .45 27 Capacitors .46 27.1 Isolating capacitor 46 27.2 Across-the-li
20、ne capacitor 46 27.3 Electrolytic capacitors .46A MARCH 9, 2015 COMMERCIAL CLOSED-CIRCUIT TELEVISION EQUIPMENT - UL 2044 3UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL 28 Batteries .47 29 Sleeving, Tape, Tubing, and Wire Insulation .47 30
21、Insulation Material 50 31 Electrical Connections .50 32 Connectors, Components, and Leads .51 33 Current-Carrying Parts 52 34 Captive Parts .52 35 Interlocks 53 36 Accessories 54 PERFORMANCE 37 General 55 38 Power Input Test .57 39 Peak Inrush-Current Test 60 40 Grounding Impedance Test 64 41 Produc
22、t Leakage and Shock Current Test .65 41.1 General .65 41.2 Leakage-current 66 41.3 Leakage current after humidity conditioning 68 41.4 Shock-current 68 41.5 Stored-energy electric shock .68 41.6 Component electric shock .68 42 Temperature Test .68 43 Maximum-Voltage Measurement 72 44 Dielectric Volt
23、age-Withstand Test .72 45 Production-Line Dielectric Potential Stability Test .74 46 Operation Tests General .74 47 Part Disconnection and Component-Handling Arcing Test .76 48 Cable Arcing Test .76 49 Strain Relief Tests 77 49.1 Power-supply cord 77 49.2 Audio-input, connection cord for separately
24、enclosed loudspeakers .77 50 Separable-Connector Cycling Test 78 51 Battery and Battery-Circuit Tests Electrical .78 52 Battery Tests Mechanical 79 53 Battery Supply Test .79 54 Vacuum Tube Filament Short-Circuit Test .79 55 Low-Voltage, Limited-Energy Circuit Test 80 56 Component Abnormal-Operation
25、 Test .81 57 Multiple-Voltage Equipment Test 81 58 Voltage Surge Test .81 59 Injury to Persons Tests 84 59.1 General .84 59.2 Product, cart, or stand 85 59.3 Handle strength 86 59.4 Wall- or ceiling-mounting means .86 60 Strength of Enclosure Tests 87 60.1 General .87 60.2 Enclosure loading 87 60.3
26、Pressure 87 60.4 Impact 88 60.5 Enclosure temperature stability .89 SEPTEMBER 15, 2008 COMMERCIAL CLOSED-CIRCUIT TELEVISION EQUIPMENT - UL 2044 4UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL 60.6 Captive knob pull .89 60.7 Portable power s
27、upply and battery charger drop test .90 60.8 Alternate enclosure material evaluation .91 61 Gasket Test 92 62 Adhesive Securement Test 92 63 Adhesive-Backed-Parts Peel Test .92 64 Outdoor-Use Wetting Test .93 64.1 General .93 64.2 Water shield .96 65 Relay Endurance Test .98 66 Tablet Flammability T
28、est .99 67 Transformer Short-Circuit and Overload Tests 99 68 Power Supply Test .100 MANUFACTURING AND PRODUCTION-LINE TESTS 69 Tests by the Manufacturer 101 69.1 Production-line dielectric voltage-withstand test .101 69.2 AC production-line test .102 69.3 DC production-line test a 103 69.4 Continui
29、ty 103 MARKINGS 70 General 103 71 Identifying and Rating Information .104 72 Cautionary and Warning Marking 106 73 Graphical Symbols .108 74 Installation, Operation, and Other Instructions .110 PRODUCTS INTENDED FOR USE IN HEALTH CARE FACILITIES 75 General 112 CONSTRUCTION 76 Cords and Plugs .112 77
30、 Separation of Circuits 112 78 Switches 113 79 Grounding 113 80 Wheels and Casters .114 81 Products Having Signaling and Nurse-Call Feature 114 82 Cleaning and Disinfecting .114 PERFORMANCE 83 Leakage Current Test 115 84 Dielectric Voltage-Withstand Test 115 85 Burnout Test 116 86 Cleaning, Impact,
31、and Drop Tests .116 SEPTEMBER 15, 2008 COMMERCIAL CLOSED-CIRCUIT TELEVISION EQUIPMENT - UL 2044 5UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL MARKINGS 87 General 117 88 Cautionary and Warning 117 89 Installation and Operating Instructions
32、 117 APPENDIX A Standards for ComponentsA1 APPENDIX B VARIABLE RESISTANCE LOAD FOR THE VOLTAGE OUTPUT CHECK DESCRIBED IN THE TRANSFORMER SHORT-CIRCUIT AND OVERLOAD TESTS, SECTION 67 B1 Purpose .B1 B2 General .B1 APPENDIXCA0.02-OHM SHUNT FOR USE IN THE PEAK INRUSH-CURRENT MEASUREMENT DESCRIBED IN THE
33、 PEAK INPUT-CURRENT TEST, SECTION 39 C1 Purpose .C1 C2 General .C1 SEPTEMBER 15, 2008 COMMERCIAL CLOSED-CIRCUIT TELEVISION EQUIPMENT - UL 2044 6UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL INTRODUCTION 1 Scope 1.1 These requirements cover
34、 closed-circuit television equipment that: a) Are intended for commercial use on supply circuits as dened in the National Electrical Code, NFPA 70; and b) Receive their signals from a video-recorded medium or image-producing devices in a closed- circuit television system. 1.2 These requirements cove
35、r closed-circuit television equipment such as video tape recorders; video-receiving, -processing, -recording, -producing, and -amplication equipment; video cameras; and the like. 1.3 These requirements also cover auxiliary equipment and accessories intended for use with closed-circuit television sys
36、tems. 1.4 These requirements also cover portable closed-circuit television equipment of the types described in 1.2 that are intended for use with a vehicular, marine, or any other battery circuit as the power supply means. 1.5 These requirements do not cover video monitors, as these products are cov
37、ered by the: a) Standard for Audio-Video Products and Accessories, UL 1492; b) Deleted c) Deleted d) Standard for Information Technology Equipment Safety Part 1: General Requirements, UL 60950-1. 1.5 revised March 9, 2015 1.6 These requirements do not cover video cameras with integral electronic vie
38、wnders. 1.7 These requirements do not cover tape-head demagnetizers or bulk tape erasers intended for use with video products and do not cover general-purpose tape-head demagnetizers or bulk tape erasers, as those products are covered by the requirements for household and commercial tape recorders i
39、n the Standard for Audio-Video Products and Accessories, UL 1492 and the Standard for Commercial Audio Equipment, UL 813. 1.8 Commercial video products provided with a means for receiving commercially broadcasted video signals and household video products are covered by the Standard for Audio-Video
40、Products and Accessories, UL 1492. MARCH 9, 2015 COMMERCIAL CLOSED-CIRCUIT TELEVISION EQUIPMENT - UL 2044 7UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL 1.9 A cart or stand that is not intended to be used with a specic product is covered b
41、y the Standard for Household, Commercial, and Professional-Use Carts and Stands for Use with Audio/Video Equipment, UL 1678. 1.9 revised March 9, 2015 2 General 2.1 Components 2.1.1 Except as indicated in 2.1.2, a component of a product covered by this standard shall comply with the requirements for
42、 that component. See Appendix A for a list of standards covering components used in the products covered by this standard. 2.1.2 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 produ
43、ct covered by this standard, or b) Is superseded by a requirement in this standard. 2.1.3 A component shall be used in accordance with its rating established for the intended conditions of use. 2.1.4 Specic components are incomplete in construction features or restricted in performance capabilities.
44、 Such components are intended for use only under limited conditions, such as certain temperatures not exceeding specied limits, and shall be used only under those specic conditions. 2.2 Undated references 2.2.1 Any undated reference to a code or standard appearing in the requirements of this standar
45、d shall be interpreted as referring to the latest edition of that code or standard. 2.3 Terminology 2.3.1 The term product as used in this standard refers to all types of closed-circuit television products. MARCH 9, 2015 COMMERCIAL CLOSED-CIRCUIT TELEVISION EQUIPMENT - UL 2044 8UL COPYRIGHTED MATERI
46、AL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL 3 Glossary 3.1 For the purpose of these requirements the following denitions apply: 3.2 ACCESSIBLE PART A part located so that it can be contacted by means of a probe (see Figure 16.1) or that is not recessed the r
47、equired distance behind an opening (see 16.9). 3.3 ADJUSTABLE CONTROL A control provided for making adjustments necessary to render the product capable of performing its intended functions. 3.4 BRANCH CIRCUIT A branch circuit is that portion of the building wiring system beyond the nal overcurrent d
48、evice on the power-distribution panel protecting the circuit to the eld-wiring terminals in a permanently connected unit or to the receptacle outlet for cord-connected units. 3.5 CART A stand (see 3.21) provided with casters, wheels, or rollers to make it mobile. 3.6 CASTER Any roller or swiveled wh
49、eel attached to a cart, stand, or product that makes the cart, stand, or product mobile. 3.7 ELECTRONIC DEVICE A part, or an assembly of parts, that employs electron or hole conduction in a vacuum, in a gaseous atmosphere, or in semiconductors. 3.8 ENCLOSURE A material intended to limit access to uninsulated live parts, and live parts insulated with materials not intended to be subjected to user contact. 3.9 FIBER The term ber is used in place of vulcanized ber to denote a
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