1、UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL UL 1678 Household, Commercial, and Institutional-Use Carts, Stands and Entertainment Centers for Use with Audio and/or Video Equipment STANDARD FOR SAFETYUL COPYRIGHTED MATERIAL NOT AUTHORIZED
2、FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM ULUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL UL Standard for Safety for Household, Commercial, and Institutional-Use Carts, Stands and Entertainment Centers for Use with A
3、udio and/or Video Equipment, UL 1678 Fifth Edition, Dated August 10, 2012 Summary of Topics This revision of ANSI/UL 1678 includes the following changes in requirements: 1. Revisions to address potential injury from different loading and unloading scenarios 2. Addition of requirements regarding the
4、securement of an audio or video device to the cart, stand or entertainment center 3. Revision to address polymeric components whose failure would cause the supported weight of the audio or video product to be released 4. Addition of requirements for testing wide handles with the load distributed bet
5、ween two 3-inch areas on the single handle The new and revised requirements are substantially in accordance with Proposal(s) on this subject dated June 3, 2016. 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
6、rights reserved. No part of this 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 exp
7、ressed or implied, including but 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 arisin
8、g out of the use of or the inability 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
9、electronic versions of ULs Standards 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 S
10、tandard on the purchasers computer system. MARCH 24, 2017 UL 1678 tr1UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL MARCH 24, 2017 UL 1678 tr2 No Text on This PageUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTI
11、ON WITHOUT PERMISSION FROM UL AUGUST 10, 2012 (Title Page Reprinted: March 24, 2017) 1 UL 1678 Standard for Household, Commercial, and Institutional-Use Carts, Stands and Entertainment Centers for Use with Audio and/or Video Equipment The First, Second, and Third Editions were titled Standard for Ho
12、usehold, Commercial, and Professional-Use Carts and Stands. The Fourth Edition was titled Standard for Household, Commercial, and Professional-Use Carts and Stands for Use with Audio/Video Equipment. Prior to the Fifth Edition of UL 1678, the requirements for Tall Institutional Carts were included i
13、n the Standard for Tall Institutional Carts for Use with Audio-, Video-, and Television-Type Equipment, UL 1667. First Edition February, 1991 Second Edition December, 1996 Third Edition July, 1998 Fourth Edition December, 2001 Fifth Edition August 10, 2012 This ANSI/UL Standard for Safety consists o
14、f the Fifth Edition including revisions through March 24, 2017. The most recent designation of ANSI/UL 1678 as an American National Standard (ANSI) occurred on March 24, 2017. ANSI approval for a standard does not include the Cover Page, Transmittal Pages, and Title Page. Comments or proposals for r
15、evisions 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 https:/. ULs Standards for Safety are copyrighted by UL. Neither a printed nor electronic copy of a Standa
16、rd 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 2017 UNDERWRITERS LABORATORIES INC. ANSI/UL 1678-2017UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTIO
17、N OR DISTRIBUTION WITHOUT PERMISSION FROM UL MARCH 24, 2017 UL 1678 2 No Text on This PageUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL CONTENTS INTRODUCTION 1 Scope .5 2 Glossary .6 3 Components 6B 4 Units of Measurement 6B 5 References .
18、6B CONSTRUCTION 6 General 7 7 Corrosion Protection .7 8 Sharp Edges .7 9 Securement of Supported Equipment 7 9.1 General-use carts 7 9.2 Tall institutional carts 8 9.3 Multiple video display surfaces .8 10 Ventilation 8 11 Materials 8 11A Materials 9 11A.1 Flammability .9 11A.2 Polymeric load suppor
19、ting parts 9 12 User Assembly .10 13 Wheels, Rollers and Casters .10 PERFORMANCE 14 General 10 15 Temperature Stability Test .11 16 Tip Stability Test 11 16.1 General .11 16.2 Carts or stands intended to support or store audio and/or video equipment other than a television or having other general st
20、orage 13 16.3 Carts, stands and entertainment centers having a support surface or mounting surface for a television 14 16.4 Dynamic tip stability test for tall institutional carts and stands 20 16.5 Force stability test 21 16.6 Appurtenance stability test 24 16.7 Multiple audio and video support sur
21、face test 24 17 Loading Tests .26 18 Handle Strength Test 26 19 Appurtenance Strength Test .27 20 Glass Parts Impact Test .28 21 Wheel, Roller, or Caster Securement Test .28 22 Braking Test .30 23 Adhesives Test .30 MARKINGS 24 General 30 MARCH 24, 2017 UL 1678 3UL COPYRIGHTED MATERIAL NOT AUTHORIZE
22、D FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL 25 Use and Care Instructions .34 APPENDIX A Standards for ComponentsA1 APPENDIX B TEST FIXTURE DETAILS (Refer to Figures 16.1 and 16.2) APPENDIX C HISTORICAL CRT TELEVISION TEST FIXTURE WEIGHT AND STABILITY PARAMETERS MARCH 24, 20
23、17 UL 1678 4UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL INTRODUCTION 1 Scope 1.1 These requirements apply to household, commercial, and institutional-use carts, stands and entertainment centers intended to provide a surface for the suppo
24、rt or attachment of audio and/or video equipment. 1.2 These requirements also apply to tall institutional-use carts and stands intended to provide a surface for the support of audio and/or video equipment that have a support bracket or shelf that is more than 39.4 inches (1 m) above the oor and are
25、intended for use in schools, institutions, hospitals or similar locations where children or persons with diminished capacity are likely to move them or may be asked to move them. 1.3 A furnishing intended to support audio and/or video equipment shall be evaluated in accordance with one of the follow
26、ing: a) If the audio and/or video support system is an entertainment center or a stand with or without casters or wheels, this standard applies; b) If the audio and/or video support system is intended to be mounted to walls, ceilings or another part of a building structure, the Standard for Wall and
27、 Ceiling Mounts and Accessories, UL 2442, applies; c) If a cart, stand or support surface is supplied with the audio or video equipment by the manufacturer of the audio or video equipment, the requirements contained in the audio or video component standard apply. The Standard for Audio, Video and Si
28、milar Electronic Apparatus, UL 60065, or the Standard for Information Technology Equipment Safety, UL 60950-1, as applicable to the product, applies. d) Information Technology and Communications Equipment Cabinets, Enclosure and Rack Systems are investigated to the Standard for Information Technolog
29、y Equipment Safety Part 1, UL 60950-1 or Audio/Video, Information and Communication Technology Equipment Part 1: Safety Requirements, UL 62368-1. 1.4 These requirements do not apply to any electrical circuitry integral to or provided with a cart, stand or entertainment center. MARCH 24, 2017 UL 1678
30、 5UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL 2 Glossary 2.1 For the purposes of this standard, the following denitions apply. 2.2 ACCESSORY An optional part that interfaces with the basic cart, stand or entertainment center and is inten
31、ded to be attached by the user or installer. Subassemblies eld assembled to form the basic cart, stand or entertainment center are not accessories. 2.3 APPURTENANCE Objects on a cart, stand or entertainment center such as a door, drawer, or a sliding work surface. 2.4 CART A stand provided with cast
32、ers, wheels, or rollers intended to make it easily mobile. 2.5 CRT Cathode Ray Tube. A vacuum tube containing an electron gun used to create images on the screen. 2.6 DEDICATED STORAGE AREA An area of a cart, stand or entertainment center intended to accommodate specic articles such as storage media
33、: tapes, CDs, DVDs, and ash drives. 2.7 DESIGNATED LOAD The maximum weight specied by the manufacturer that the cart, stand or entertainment center is intended to accommodate. 2.8 ENTERTAINMENT CENTER A furnishing intended to support a television and the associated audio equipment; also provided wit
34、h doors, drawers or shelves. 2.9 HANDLE A feature that is specically intended to facilitate carrying, transporting, lifting or movement of the total product. Features such as drawer pulls, knobs on drawers or doors, decorative moldings and shelf edges are not considered to be handles. 2.10 INSTITUTI
35、ONAL AREAS Include but are not limited to health care facilities, old age convalescent board and care homes, college dormitories, schools, residence halls, jails, prisons, nursing care homes, public auditoriums, hotels and motels. 2.11 MAXIMUM ANTICIPATED LOAD A test weight that is based on the usab
36、le volume of a compartment. 2.12 MOUNTING SURFACE A surface that is a part of the cart, stand or entertainment center used for securing a at panel video display (television) to the cart, stand or entertainment center. Flat panel video displays are connected to the mounting system or bracket with har
37、dware and fasteners. Mounting surfaces may be xed position or adjustable to various angles and heights. 2.13 NORMAL USE Those operations performed by the user to utilize a fully assembled cart or stand, with or without equipment and accessory loads installed. 2.14 ORDINARY TOOLS Tools which are norm
38、ally expected to be available to the user, such as, at-bladed and cross-recessed head (Phillips-type) screwdrivers, hammers, nut drivers, and pliers. MARCH 24, 2017 UL 1678 6UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL 2.15 RACK A type of
39、 framework designed to mount or secure audio, video and ITE equipment. 2.16 RESIDENCE (HOUSEHOLD) A place where people live such as a house or apartment. The terms household and residence are equivalent. 2.17 SIMULATED TELEVISION LOAD A test xture intended to simulate a video display or television (
40、as used within this Standard, the terms television, TV, and video display are equivalent). a) Figure 16.1 The xture depicted simulates all technology televisions, monitors or video displays that are free standing and that will rest on a television shelf. b) Figure 16.2 The xture depicted simulates a
41、t panel video display television technology and is used for testing when the television is intended to be secured to a mounting bracket provided with the cart, stand or entertainment center. 2.18 STAND A structure on or in which audio and/or video equipment and accessories are intended to be placed,
42、 contained, or mounted for support. 2.19 SUPPORTING SURFACE Any surface (shelf, drawer, or similar surface) that is intended to support equipment or an accessory that is used with equipment (records, tapes, digital discs, headphones, and similar products). 2.20 TALL INSTITUTIONAL CART a) A cart wher
43、e the television or apparatus supporting surface is more than 39.4 inches (1 m) above the oor and the cart is recommended by the manufacturer to be used in institutional areas where children, or people with diminished capacity are likely to move or may be asked to move the cart; or b) A cart where t
44、he television when mounted to the mounting surface of the cart places the center line of the television surface more than 39.4 inches (1 m) above the oor and the cart is recommended by the manufacturer to be used in institutional areas where children, or people with diminished capacity are likely to
45、 move or may be asked to move the cart. 2.21 TELEVISION Cathode Ray Tube (CRT), Monitor or Video Display LED, LCD, OLED, Plasma or similar equipment intended to provide a visible image or information to the user. 2.22 TELEVISION SHELF A horizontal or sloping surface specically identied in the use an
46、d care instructions for the placement and support of a television. 2.23 USER ASSEMBLY Any mechanical assembly of the cart, stand or entertainment center, performed by the user. 2.24 UTILIZATION EQUIPMENT Equipment that utilizes energy for electronic, electromechanical, heating, lighting or similar p
47、urposes. MARCH 24, 2017 UL 1678 6AUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL 3 Components 3.1 Except as indicated in 3.2, a component of a product covered by this standard shall comply with the requirements for that component. 3.2 A com
48、ponent 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. 3.3 A component shall be used in accordance with i
49、ts rating established for the intended conditions of use. 3.4 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 exceeding specied limits, and shall be used only under those specic conditions. 3.5 An adhesively applied marking that is required to be permanent shall comply with the Standard for
