1、UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL UL 2420 Belowground Reinforced Thermosetting Resin Conduit (RTRC) and FittingsUL 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 Belowground Reinforced Thermosetting Resin Conduit (RTRC) and Fittings, UL 2420 First Edition, Dated July 30, 2009 Summary of Topics 1. These editorial revisions are being iss
3、ued to correct typographical errors in Tables 5 and Table 7. 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 publication may be reproduced, stored in a retrieval system, or tra
4、nsmitted 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 merchantability or tness
5、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 UL representa
6、tive 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 harmless fro
7、m 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 effect, exce
8、pt for those paragraphs, sections, tables, gures, and/or other elements of the Standard having future effective dates as indicated in the preface. The prior text for requirements that have been revised and that have a future effective date are located after the Standard, and are preceded by a SUPERS
9、EDED REQUIREMENTS notice. FEBRUARY 26, 2014 UL 2420 tr1UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL FEBRUARY 26, 2014 UL 2420 tr2 No Text on This PageUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT
10、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 Conduit (RTRC) and Fittings July 30, 2009 (Title Page Reprinted: February 26, 2014) ANSI/UL 2420-2012UL COPYRIGHTED MA
11、TERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL Commitment for Amendments This standard is issued jointly by the Canadian Standards Association (CSA) and Underwriters Laboratories Inc. (UL). Comments or proposals for revisions on any part of the standard may
12、 be submitted to CSA or UL at any time. Revisions to this standard will be made only after processing according to the standards development procedures of CSA and UL. CSA and UL will issue revisions to this standard by means of revised or additional pages bearing their date of issue. ISBN 1-55397-05
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14、Copyright 2014 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 sole and exclusiv
15、e property of UL. This ANSI/UL Standard for Safety consists of the First Edition including revisions through February 26, 2014. The most recent designation of ANSI/UL 2420 as an American National Standard (ANSI) occurred on September 21, 2012. ANSI approval for a standard does not include the Cover
16、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 (CSDS) at http:/. T
17、o purchase UL Standards, visit COMM 2000 at http:/m- help/how_to_order.aspx 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 me
18、asurement 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 W
19、ater absorption 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
20、.) 14 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
21、.2 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
22、WITHOUT PERMISSION FROM UL PREFACE This is the common CSA 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. Previously, requirements for belowground RTRC were found in the common CSA
23、and UL Standard for Reinforced Thermosetting Resin Conduit and Fittings. This edition of CSA C22.2 No. 2420 supersedes the fourth edition of CSA C22.2 No. 211.3-96 last revised on June 1, 1997, for products covered in this standard, as indicated in the scope of this standard. This edition of UL 2420
24、 supersedes the third edition of UL 1684 last revised on August 11, 2004. This common standard was prepared by the Canadian Standards Association (CSA) and Underwriters Laboratories Inc. (UL). The efforts and support of the conduit manufacturing industry and the Technical Harmonization Subcommittee
25、for Conduit 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
26、by the 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 s
27、tandard 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 be considered a minimum quantity. Note: Although the intended primary application of this standard is
28、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 uses an IEC format, but is not based on, nor is it to be considered an IEC standard. This standard
29、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 governmental regulations and those recognized as being in accordance with NAFTA Article 9
30、05, 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 be word for word except for editorial changes. Reasons for differences from IEC The T
31、echnical Harmonization Subcommittee identied several IEC standards that address electrical conduit and tubing included in the scope of this standard. The IEC standards for electrical conduit and tubing are recognized as being generally system-specic, containing the requirements for the relevant cond
32、uits and cables and associated ttings in several discrete IEC standards. The THSC determined the safe use of electrical conduit and tubing is dependent on the design and performance of the conduit and tubing systems with which they are intended to be installed. Signicant investigation is required to
33、 assess safety and system compatibility issues that may lead to harmonization FEBRUARY 26, 2014 CSA C22.2 NO. 2420-09 UL 2420 4UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL of traditional North American electrical conduit and tubing and as
34、sociated ttings with those presently addressed in the known IEC standards. The THSC agreed such future investigation might be facilitated by completion of harmonization of the North American standards for electrical conduit and tubing and their ttings. Interpretations The interpretation by the stand
35、ards development organization of an identical or 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 revi
36、sion is to be proposed as soon as possible to each of the standards development organizations to more accurately reect the intent. CSA effective date The effective date for CSA International will be announced through CSA Informs or a CSA Certication Notice. UL effective date As of February 26, 2014,
37、 all products Listed or Recognized by UL must comply with the requirements in this standard. A UL effective date is established by Underwriters Laboratories Inc. and is not part of the ANSI approved standard. FEBRUARY 26, 2014 CSA C22.2 NO. 2420-09 UL 2420 5UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR
38、 FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL Belowground Reinforced Thermosetting Resin Conduit (RTRC) and 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
39、and use in accordance with CSA C22.1, Canadian Electrical Code (CEC), Part I, and NFPA 70, National Electrical Code (NEC). 1.2 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
40、 This Standard covers ID (dimensions based on inside diameters) and IPS (dimensions based on outside diameters of iron pipe sizes) 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
41、not necessarily reect metric trade sizes 1.5 This Standard covers conduit with designations EB (encased burial) and DB (direct 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
42、 Fittings specied in this Standard include, but are not limited to, straight couplings, 5 angle couplings, adapters, and elbows 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
43、at the factory, either integrally wound or a permanently attached coupling. 2.3 Low-halogen a material having not more than 0.2% 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 en
44、cased in concrete. Note: For other denitions, refer to NEC and/or CEC. 3 Reference publications and units of measurement 3.1 Reference 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 la
45、test edition and all amendments published thereto; and where such reference is made to other publications, it shall be to the edition 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
46、CSA Standard C22.1-09 Canadian Electrical Code (CEC), Part I ANSI/NFPA* Standard NFPA 70-2008 National Electrical Code (NEC) ASTM Standard D 638-08 Standard Test Method for Tensile Properties of Plastics * American National Standards Institute/National Fire Protection Association American Society fo
47、r Testing and Materials. 3.2 Units of measurement 3.2.1 The values given in SI (metric) units are mandatory. Any other values are 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 uni
48、form wall, a smooth interior, and shall not contain any features that can damage wiring installed in the conduit. 4.1.2 Conduit 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
49、 provide a mechanically secure and watertight joint. JULY 30, 2009 CSA C22.2 NO. 2420-09 UL 2420 7UL COPYRIGHTED MATERIAL NOT AUTHORIZED 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 Couplings 4.3.1 Couplings shall be straigh
