UL 2044-2008 UL Standard for Safety Commercial Closed-Circuit Television Equipment (Third Edition Reprint with Revisions Through and Including December 22 2016)《商用闭合电路电视设备》.pdf
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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
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