1、UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL UL 2044 Commercial Closed-Circuit Television Equipment STANDARD FOR SAFETYUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM ULUL COPYRIGHTE
2、D MATERIAL NOT AUTHORIZED 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 ANSI/UL 2044 is being issued to reect the recent
3、 reaffirmation of UL 2044 as an American National Standard. No changes have been made to the requirements within this standard. 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 reserved. No part of this
4、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 implied, including but
5、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 use of or the inabil
6、ity 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 versions of ULs Standa
7、rds 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 Standard on the purchasers compute
8、r system. DECEMBER 22, 2016 UL 2044 tr1UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL DECEMBER 22, 2016 UL 2044 tr2 No Text on This PageUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM
9、UL SEPTEMBER 15, 2008 (Title Page Reprinted: December 22, 2016) 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 consists of the Third Edition including revisions
10、 through December 22, 2016. The most recent designation of ANSI/UL 2044 as a Reaffirmed American National Standard (ANS) occurred on December 22, 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
11、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 Safety are copyrighted by UL. Neither a printed nor electronic copy of a Standard should be altered in
12、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 2016 UNDERWRITERS LABORATORIES INC. ANSI/UL 2044-2004 (R2016)UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTIO
13、N WITHOUT PERMISSION FROM UL DECEMBER 22, 2016 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 INTRODUCTION 1 Scope .7 2 General 8 2.1 Components .8 2.2
14、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 Product and Accessory Assembly .17 11 Adhesive-Backed Conduc
15、tive 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 Replacement of Parts .30 18 Power-Supply Connections 31 19 Supply
16、 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 Reinforced insulation .38 21.5 Grounding .38 21.6 Optional g
17、rounding .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-line capacitor 46 27.3 Electrolytic capacitors .46A DECEMBER
18、22, 2016 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 Insulation Material 50 31 Electrical Connections .50 32
19、 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 Product Leakage and Shock Current Test .65 41.1 General .65 4
20、1.2 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 Voltage-Withstand Test .72 45 Production-Line Dielectric Po
21、tential 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 enclosed loudspeakers .77 50 Separable-Connector Cyclin
22、g 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 Test .81 57 Multiple-Voltage Equipment Test 81 58 Volt
23、age 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 Pressure 87 60.4 Impact 88 60.5 Enclosure temperature s
24、tability .89 DECEMBER 22, 2016 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 supply and battery charger drop test .90 60.8 Alternate e
25、nclosure 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 Test .99 67 Transformer Short-Circuit and Overload Tests
26、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 Continuity 103 MARKINGS 70 General 103 71 Identifying and Rating
27、 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 Separation of Circuits 112 78 Switches 113 79 Grounding
28、 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, and Drop Tests .116 DECEMBER 22, 2016 COMMERCIAL CLOSED-
29、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 117 APPENDIX A Standards for ComponentsA1 APPENDIX B VAR
30、IABLE 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 PEAK INPUT-CURRENT TEST, SECTION 39 C1 Purpose .C1 C2 Ge
31、neral .C1 DECEMBER 22, 2016 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 closed-circuit television equipment that: a) Are intended
32、 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 cover closed-circuit television equipment such as video tape r
33、ecorders; 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 systems. 1.4 These requirements also cover portable closed-ci
34、rcuit 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 covered by the: a) Standard for Audio-Video Products and Acce
35、ssories, 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 viewnders. 1.7 These requirements do not cover tape-head dema
36、gnetizers 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 in the Standard for Audio-Video Products and Accessories, U
37、L 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 Products and Accessories, UL 1492. MARCH 9, 2015 COMMERCIA
38、L 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 by the Standard for Household, Commercial, and Professional
39、-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 that component. See Appendix A for a list of standards co
40、vering 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 product covered by this standard, or b) Is superseded by a requ
41、irement 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. Such components are intended for use only under limited c
42、onditions, 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 standard shall be interpreted as referring to the latest edition
43、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 MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION
44、 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 required distance behind an opening (see 16.9). 3.3 ADJUSTA
45、BLE 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 device on the power-distribution panel protecting the circu
46、it 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 wheel attached to a cart, stand, or product that makes the c
47、art, 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 materi
48、als not intended to be subjected to user contact. 3.9 FIBER The term ber is used in place of vulcanized ber to denote a material usually used as electrical insulation. Vulcanized ber is made by combining layers of chemically gelled paper. The chemical compound used in gelling the paper is subsequent
49、ly removed by leaching, and the resulting product, after being dried and nished by calendaring, is a dense material of partially regenerated cellulose in which the brous structure is retained in varying degrees, depending upon the grade of ber. Cellulose berboard, pressboard, fullerboard, or cardboard are not accepted as the equivalent of ber. Fishpaper is a designation commonly used in the trade to refer to thin sheets of electrical grade vulcanized ber. 3.10 FIELD-WIRING T
