1、UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL UL 2577 Suspended Ceiling Power Grid Systems and Equipment STANDARD FOR SAFETYUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM ULUL COPYRI
2、GHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL UL Standard for Safety for Suspended Ceiling Power Grid Systems and Equipment, UL 2577 First Edition, Dated February 7, 2013 Summary of Topics The following changes in requirements to the Joint UL/ULC S
3、tandard for Suspended Ceiling Power Grid Systems and Equipment, UL 2577/ULC-S2577, are being issued for the United States and Canada: Add new denition for Low Voltage/Extra-Low Voltage and revise voltage references throughout the standard to correlate with the Canadian Electrical Code, Part 1, and t
4、he National Electrical Code, NFPA 70 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 revised requirements are substantially in accordance with Proposal(s) on this subject dated August 5, 2016. All rights reser
5、ved. 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 expressed or
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7、he 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 electronic
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9、 the purchasers computer system. FEBRUARY 16, 2017 UL 2577 tr1UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL FEBRUARY 16, 2017 UL 2577 tr2 No Text on This PageUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION W
10、ITHOUT PERMISSION FROM UL Prepared by: ULC Standards CAN/ULC-S2577 First Edition Underwriters Laboratories Inc. ANSI/UL 2577 First Edition Suspended Ceiling Power Grid Systems and Equipment February 7, 2013 (Title Page Reprinted: February 16, 2017) ANSI/UL 2577-2017 Approved byUL COPYRIGHTED MATERIA
11、L NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL Commitment for Amendments This Standard is issued jointly by Underwriters Laboratories Inc. (UL) and ULC Standards. Amendments to this Standard will be made only after processing according to the Standards writing p
12、rocedures by UL and ULC Standards. UL and ULC Standards are separate and independent entities and each is solely responsible for its operations and business activities. The UL trade names and trademarks depicted in this document are the sole property of Underwriters Laboratories Inc. The ULC Standar
13、ds trade names and trademarks depicted in this document are the sole property of ULC Standards. ISSN 0317-526X Copyright 2017 ULC Standards All rights reserved. No part of this publication may be reproduced in any form, in an electronic retrieval system or otherwise, whatsoever without the prior per
14、mission of the publisher. In Canada, written comments are to be sent to ULC Standards, 400 171 Nepean Street, Ottawa, Ontario KP2 0B4. Proposals should be submitted on a Standards Revision Request Form available from ULC Standards. Copyright 2017 Underwriters Laboratories Inc. ULs Standards for Safe
15、ty are copyrighted by UL. Neither a 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. This ANSI/UL Standard for Safety consists of the F
16、irst Edition including revisions through February 16, 2017. The most recent designation of ANSI/UL 2577 as an American National Standard (ANSI) occurred on February 16, 2017. ANSI approval for a standard does not include the Cover Page, Transmittal Pages, Title Page (front and back), or the Preface.
17、 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 https:/. To purchase UL Standards, visit Comm 2000 at http:/m- or call toll-fr
18、ee 1-888-853-3503.UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL CONTENTS Preface . 5 INTRODUCTION 1 Scope .6 2 Components 7 3 Units of Measurement .8 4 Undated References 8 5 Glossary .8 MECHANICAL CONSTRUCTION 6 General 8B 7 Assembly and
19、Mounting 8B 8 Metal Components .8B 9 Polymeric Enclosure and Insulation Materials .10 9.1 General 10 9.2 Flammability 10 9.3 Relative Thermal Index (RTI) .11 9.4 Electrical properties 11 10 System Flammability 11 11 Adhesives .11 12 Strain Relief 12 ELECTRICAL CONSTRUCTION 13 General .12 14 Current-
20、Carrying Parts 13 15 Securement of Components 13 16 Splices and Connections 14 17 Electrical Spacings 15 18 Class 2 Power Supplies and Transformers .15 19 Luminaires .16 20 Switches and Controls .16 21 Control Circuits .17 22 Class 2 Supply and Load Connectors .18 22.1 General .18 22.2 Power feed co
21、nnector 18 22.3 Load connectors .19 23 Field Wiring 19 23.1 Field wiring terminals .19 23.2 Separation for CEC/NEC Class 2 circuits 20 PERFORMANCE 24 Connector Tests 21 24.1 General .21 24.2 Movable connector cycle conditioning and temperature test .21 24.3 Field-installed conductors conditioning an
22、d temperature test .22 24.4 Fixed connector cycling test .22 FEBRUARY 16, 2017 CAN/ULC-S2577 ANSI/UL 2577 3UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL 25 System Temperature Test .22 25.1 General .22 25.2 Test setup grid rail system .24 2
23、5.3 Test setup power supplies and low voltage/extra-low voltage equipment 24 26 Mechanical Assembly Load Test 24 27 Moment Test .25 28 System Flammability Test Grid Rails 25 29 System Flammability Test Discrete Components Located In Air-Handling Spaces .26 30 Mold Stress-Relief Distortion Test .27 3
24、1 Connector Drop Test 27 32 Field Cutting Test .28 33 Conductor Secureness Test 28 34 Strain Relief Test .29 35 Push-Back Relief Test for Conductors or Cable 29 36 Dielectric Voltage Withstand Test .30 MARKINGS 37 Details .31 37.1 General .31 37.2 Connectors 32 37.3 Air-handling use 33 37.4 Correlat
25、ion markings 34 38 Installation and Operating Instructions .34 38.1 General .34 38.2 Operating instructions .37 38.3 Connectors 38 TABLES FIGURES ANNEX A (NORMATIVE) Reference Standards Standards for Components ANNEX B (NORMATIVE) Reference Publications FEBRUARY 16, 2017 CAN/ULC-S2577 ANSI/UL 2577 4
26、UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL Preface This is the common UL and ULC Standard for Suspended Ceiling Power Grid Systems and Equipment. It is the First edition of both CAN/ULC-S2577 and ANSI/UL 2577. This Joint Standard was pr
27、epared by Underwriters Laboratories Inc., ULC Standards, and the Technical Committee on Solid State Lighting (TCSSL). The standard was formally approved by the UL/ULC Technical Committee on Solid State Lighting (TCSSL). The efforts and support of the Technical Committee are gratefully acknowledged.
28、Only metric SI units of measurement are used in this Standard. If a value for measurement is followed by a value in other units in parentheses, the second value may be approximate. The rst stated value is the requirement. In Canada, there are two official languages, English and French. All safety wa
29、rnings must be in French and English. Attention is drawn to the possibility that some Canadian authorities may require additional markings and/or installation instructions to be in both official languages. Annexes A and B, both identifed as normative, form a mandatory part of this Standard. Note: Al
30、though the intended primary application of this Standard is stated in its scope, it is important to note that it remains the responsibility of the users of the standard to judge its suitability for their particular purpose. Level of Harmonization This Standard is published as an identical standard b
31、etween UL and ULC Standards. An identical standard is a standard that is the same in technical content except for conicts in Codes and Governmental Regulations. Presentation shall be word for word except for editorial changes. Interpretations The interpretation by the SDO of an identical or equivale
32、nt standard shall be based on the literal text to determine compliance with the standard in accordance with the procedural rules of the SDO. If more than one interpretation of the literal text has been identied, a revision shall be proposed as soon as possible to each of the SDOs to more accurately
33、reect the intent. FEBRUARY 16, 2017 CAN/ULC-S2577 ANSI/UL 2577 5UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL INTRODUCTION 1 Scope 1.1 These requirements cover suspended ceiling grid low voltage/extra-low voltage systems and equipment inte
34、nded for installation and use in accordance with the: In Canada: Canadian Electrical Code, Part I, Safety Standard for Electrical Installations, CSA C22.1, In the United States: National Electrical Code (NEC), ANSI/NFPA 70. 1.2 The suspended ceiling grid low voltage/extra-low voltage systems covered
35、 by this standard are intended to be installed as a suspended ceiling grid that provides mechanical support for the ceiling tiles and provides electrical connections between the low voltage/extra-low voltage power supply and the low voltage/extra-low voltage equipment. The low voltage/extra-low volt
36、age system consists of the following components: a) An isolating type low voltage/extra-low voltage power supply with output(s) operating at 30 V (42.4 V peak) or less and not exceeding Class 2 power limits, b) A grid rail power distribution system to provide power from the Class 2 power supply to o
37、ne or more pieces of Class 2 powered equipment, and c) Class 2 powered equipment that is electrically connected to the suspended ceiling grid low voltage/extra-low voltage system. 1.3 The suspended ceiling grid low voltage/extra-low voltage system is intended to be permanently connected, for indoor
38、dry locations, and installed in accordance with the following requirements: In Canada: Canadian Electrical Code, Part I, Safety Standard for Electrical Installations, CSA C22.1, and the National Building Code of Canada. In the United States: National Electrical Code (NEC), ANSI/NFPA 70, the Internat
39、ional Building Code (IBC), and the International Mechanical Code (IMC). This standard also covers suspended ceiling grid low voltage/extra-low voltage systems intended for use in air-handling spaces. FEBRUARY 16, 2017 CAN/ULC-S2577 ANSI/UL 2577 6UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REP
40、RODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL 1.4 This standard does not address any supplemental or alternative requirements for suspended ceiling grid low voltage/extra-low voltage systems intended for use in: In Canada: a) Hazardous locations as specied in the Canadian Electrical Code, Par
41、t I, Safety Standard for Electrical Installations, CSA C22.1; b) General patient care areas or critical patient care areas as dened by Section 24 of the Canadian Electrical Code, Part I, Safety Standard for Electrical Installations, CSA C22.1; or c) Emergency systems as dened by Section 46 of the Ca
42、nadian Electrical Code, Part I, Safety Standard for Electrical Installations, CSA C22.1. In the United States: a) Hazardous locations as specied in the National Electrical Code (NEC), ANSI/NFPA 70; b) General patient care areas or critical patient care areas as dened by Article 517 of the National E
43、lectrical Code (NEC), ANSI/NFPA 70; or c) Emergency systems as dened by Article 700 of the National Electrical Code (NEC), ANSI/NFPA 70. 1.5 This standard does not evaluate the suspended ceiling grid low voltage/extra-low voltage system for seismic requirements in accordance with the: In Canada: Nat
44、ional Building Code of Canada. In the United States: International Building Code (IBC). 1.6 This standard does not evaluate the suspended ceiling grid low voltage/extra-low voltage systems for re resistance. 2 Components 2.1 Except as indicated in 2.2, a component of a product covered by this standa
45、rd shall comply with the requirements for that component. See Annex A for a list of standards covering components used in the products covered by this standard. FEBRUARY 16, 2017 CAN/ULC-S2577 ANSI/UL 2577 7UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMI
46、SSION FROM UL 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 component shall be us
47、ed 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 exceeding spe
48、cied limits, and shall be used only under those specic conditions. 3 Units of Measurement 3.1 Values stated without parentheses are the requirement. Values in parentheses are explanatory or approximate information. 3.2 Unless otherwise indicated, all voltage and current values mentioned in this stan
49、dard are root-mean-square (rms). 4 Undated References 4.1 See Annex B for a list of publications referenced in this standard. 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 Glossary 5.1 For the purpose of this standard, the following denitions shall apply. 5.2 BUS BAR A non-insulated conductor electrically connected to the source of supply
