1、UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL UL 2420 Belowground Reinforced Thermosetting Resin Conduit (RTRC) and Fittings STANDARD FOR SAFETYUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISS
2、ION FROM ULUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL UL Standard for Safety for Belowground Reinforced Thermosetting Resin Conduit (RTRC) and Fittings, UL 2420 First Edition, Dated July 30, 2009 Summary of Topics This revision of ANSI/
3、UL 2420 is being issued to reaffirm approval as an American National Standard. No changes in requirements are involved. As noted in the Commitment for Amendments statement located on the back side of the title page, UL and CSA are committed to updating this harmonized standard jointly. However, the
4、revision pages dated (December, 16, 2016) will not be jointly issued by UL and CSA as these revision pages only address UL 2420 ANSI approval dates. 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 requ
5、irements are substantially in accordance with Proposal(s) on this subject dated October 21, 2016 All 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 wit
6、hout 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 merchantability or tness for any purpose. In no event will UL be liable for any special, incidental, consequential, indirect
7、 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 UL representative has been advised of the possibility of such damage. In no event shall ULs liability for any da
8、mage 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 harmless from and against any loss, expense, liability, damage, claim, or judgment (including reasonable attorn
9、eys fees) resulting from any error or deviation introduced while purchaser is storing an electronic Standard on the purchasers computer system. DECEMBER 16, 2016 UL 2420 tr1UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL DECEMBER 16, 2016 UL
10、 2420 tr2 No Text on This PageUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL Canadian Standards Association CSA C22.2 No. 2420-09 First Edition Underwriters Laboratories Inc. UL 2420 First Edition Belowground Reinforced Thermosetting Resin
11、Conduit (RTRC) and Fittings July 30, 2009 (Title Page Reprinted: December 16, 2016) ANSI/UL 2420-2016UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL Commitment for Amendments This standard is issued jointly by the Canadian Standards Associat
12、ion (operating as “CSA Group”) and Underwriters Laboratories Inc. (UL). Comments or proposals for revisions on any part of the standard may be submitted to CSA Group or UL at anytime. Revisions to this standard will be made only after processing according to the standards development procedures of C
13、SA Group and UL. CSA Group and UL will issue revisions to this standard by means of a new edition or revised or additional pages bearing their date of issue. ISBN 1-55397-056-X 2014 CSA Group All rights reserved. No part of this publication may be reproduced in any form whatsoever without the prior
14、permission of the publisher. This Standard is subject to review ve years from the date of publication, and suggestions for its improvement will be referred to the appropriate committee. To submit a proposal for change, please send the following information to inquirescsagroup.org and include Proposa
15、l for change in the subject line: Standard designation (number); relevant clause, table, and/or gure number; wording of the proposed change; and rationale for the change. To purchase CSA Group Standards and related publications, visit CSAs Online Store at shop.csa.ca or call toll-free 1-800-463-6727
16、 or 416-747-4044. Copyright 2016 Underwriters Laboratories Inc. ULs Standards for Safety 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
17、 sole and exclusive property of UL. This ANSI/UL Standard for Safety consists of the First Edition including revisions through December 16, 2016. The most recent designation of ANSI/UL 2420 as an American National Standard (ANSI) occurred on December 16, 2016. ANSI approval for a standard does not i
18、nclude the Cover Page, Transmittal Pages, Title Page (front and back), or the Preface. 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 (C
19、SDS) at https:/. To purchase UL Standards, visit Comm 2000 at http:/m- or call toll-free 1-888-853-3503.UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL CONTENTS PREFACE 4 1 Scope .6 2 Denitions .6 3 Reference publications and units of measur
20、ement 6 3.1 Reference publications .6 3.2 Units of measurement .7 4 Construction .7 4.1 General 7 4.2 Conduit with an integral belled end .8 4.3 Couplings 8 4.4 Elbows 8 4.5 Adapters 8 5 Qualication tests 8 5.1 Conditioning 8 5.2 Compression .9 5.3 Impact resistance at low temperature .9 5.4 Water a
21、bsorption 10 5.5 Chemical resistance (optional) 10 5.6 Watertightness 12 5.7 Joint separation .12 5.8 Flattening resistance .13 5.9 Halogen content .13 5.10 Infrared spectroscopy .13 5.11 Tensile strength .14 5.12 Durability of printing (all types with surface-applied markings of ink, dyes, etc.) .1
22、4 6 Marking .15 Annex A (Normative) Method to determine the halogen content of a low-halogen material using the calculation method from pH and acid gas evolution A.1 General .28 A.2 Test equipment 28 A.2.1 General .28 A.2.2 Equipment layout 28 A.3 Test procedure 29 A.3.1 Sample preparation .29 A.3.2
23、 Apparatus assembly .29 A.3.3 Acid gas evolution .30 A.3.4 Acid gas measurement .31 Annex B (informative) Rationale for threaded adapter dimensions for size 4-1/2 (116) FEBRUARY 26, 2014 CSA C22.2 NO. 2420-09 UL 2420 3UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WI
24、THOUT PERMISSION FROM UL PREFACE This is the harmonized CSA Group and UL standard for belowground reinforced thermosetting resin conduit (RTRC) and ttings. It is the rst edition of CSA C22.2 No. 2420, and the rst edition of UL 2420. This harmonized standard has been jointly revised on December 16, 2
25、016. For this purpose, CSA Group and UL are issuing revision pages dated December 16, 2016. This harmonized standard was prepared by the CSA Group and Underwriters Laboratories Inc. (UL). The efforts and support of the conduit manufacturing industry and the Technical Harmonization Subcommittee for C
26、onduit and Tubing, of the Council of the Harmonization of Electrotechnical Standards for the Nations of the Americas (CANENA), are gratefully acknowledged. This standard is considered suitable for use for conformity assessment within the stated scope of the standard. This standard was reviewed by th
27、e CSA Integrated Committee on Nonmetallic Conduit, Tubing, and Fittings, under the jurisdiction of the CSA Technical Committee on Wiring Products and the CSA Strategic Steering Committee on Requirements for Electrical Safety, and has been formally approved by the CSA Technical Committee. This standa
28、rd has been approved as a National Standard of Canada by the Standards Council of Canada (SCC). This standard has been approved by the American National Standards Institute as an American National Standard. Where reference is made to a specic number of samples to be tested, the specied number is to
29、be considered a minimum quantity. Note: Although 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. Application of Standard Where refe
30、rence is made to a specic number of samples to be tested, the specied number is to be considered a minimum quantity. Note: Although 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 jud
31、ge its suitability for their particular purpose. Level of Harmonization This standard is published as an equivalent standard for CSA and UL. An equivalent standard is a standard that is substantially the same in technical content, except as follows: Technical deviations are allowed for codes and gov
32、ernmental regulations and those recognized as being in accordance with NAFTA Article 905, for example, because of fundamental, climatic, geographical, technological or infrastructural factors, scientic justication, or the level of protection that the country considers appropriate. Presentation is to
33、 be word for word except for editorial changes. DECEMBER 16, 2016 CSA C22.2 NO. 2420-09 UL 2420 4UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL Interpretations The interpretation by the standards development organization of an identical or
34、equivalent standard is based on the literal text to determine compliance with the standard in accordance with the procedural rules of the standards development organization. If more than one interpretation of the literal text has been identied, a revision is to be proposed as soon as possible to eac
35、h of the standards development organizations to more accurately reect the intent. DECEMBER 16, 2016 CSA C22.2 NO. 2420-09 UL 2420 5UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL Belowground Reinforced Thermosetting Resin Conduit (RTRC) and
36、Fittings 1 Scope 1.1 This Standard species the requirements for low-halogen belowground (Type BG) reinforced thermosetting resin conduit (RTRC) and ttings, for installation and use in accordance with CSA C22.1, Canadian Electrical Code (CEC), Part I, and NFPA 70, National Electrical Code (NEC). 1.2
37、The products specied in this Standard are intended for use at -40C (-40F) to 110C (230F). 1.3 Type BG conduit has not been evaluated for directional boring applications. 1.4 This Standard covers ID (dimensions based on inside diameters) and IPS (dimensions based on outside diameters of iron pipe siz
38、es) conduit and ttings. Trade sizes (metric designators) are 1/2 (16) to 6 (155). Note: The values in parenthesis are metric size designations of conduits and ttings and do not necessarily reect metric trade sizes 1.5 This Standard covers conduit with designations EB (encased burial) and DB (direct
39、burial), which refer to specic wall thicknesses. EB conduit, is suitable for encasement in concrete. DB conduit is suitable for encasement in concrete and direct burial. 1.6 Fittings specied in this Standard include, but are not limited to, straight couplings, 5 angle couplings, adapters, and elbows
40、 with plain ends or integral belled ends at one or both ends. 2 Denitions 2.1 The following denitions apply in this standard: 2.2 Integral belled end a belled end installed at the factory, either integrally wound or a permanently attached coupling. 2.3 Low-halogen a material having not more than 0.2
41、% by weight of total halogen content. 2.4 Type BG conduit and associated ttings that have been evaluated for underground use only, for direct burial with or without being encased in concrete. Note: For other denitions, refer to NEC and/or CEC. 3 Reference publications and units of measurement 3.1 Re
42、ference publications 3.1.1 This Standard refers to the following publications; where such reference is made to CSA or UL Standards, it shall be considered to refer to the latest edition and all amendments published thereto; and where such reference is made to other publications, it shall be to the e
43、dition listed below. JULY 30, 2009 CSA C22.2 NO. 2420-09 UL 2420 6UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL CSA Standard C22.1-09 Canadian Electrical Code (CEC), Part I ANSI/NFPA* Standard NFPA 70-2008 National Electrical Code (NEC) AS
44、TM Standard D 638-08 Standard Test Method for Tensile Properties of Plastics * American National Standards Institute/National Fire Protection Association American Society for Testing and Materials. 3.2 Units of measurement 3.2.1 The values given in SI (metric) units are mandatory. Any other values a
45、re for information only. 4 Construction 4.1 General 4.1.1 Conduit and ttings shall be ber impregnated with a cured thermosetting resin compound. The conduit shall have a uniform wall, a smooth interior, and shall not contain any features that can damage wiring installed in the conduit. 4.1.2 Conduit
46、 shall be straight, and both ends of each length of conduit shall be perpendicular to the longitudinal axis of the conduit. 4.1.3 Integral and non-integral connections shall provide a mechanically secure and watertight joint. JULY 30, 2009 CSA C22.2 NO. 2420-09 UL 2420 7UL COPYRIGHTED MATERIAL NOT A
47、UTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL 4.2 Conduit with an integral belled end 4.2.1 The dimensions of conduit with an integral coupling on one end shall be in accordance with Tables 1 to 4. They shall also meet the requirements of Clauses 5.6 and 5.7. 4.3 Coup
48、lings 4.3.1 Couplings shall be straight with belled ends, or 5 angle couplings. Dimensions of couplings shall be in accordance with Tables 5 to 8. Couplings shall also meet the requirements of Clauses 5.6 and 5.7. 4.4 Elbows 4.4.1 Elbows shall be provided with plain ends or have an integral belled e
49、nd at one or both ends. Elbows shall also meet the requirements of Clause 5.6. 4.4.2 The radius and dimension of an elbow shall be as shown in Table 9 and Figure 1. 4.4.3 The straight-end portions (see dimension L s on Figure 1) of an elbow shall be at least 13 mm (1/2 in) longer than the maximum socket depth. 4.5 Adapters 4.5.1 Threaded adapters and threaded box connectors 4.5.1.1 Adapters for joining conduit to other threaded systems shall be as sp
