1、 ANSI C80.6-2005 American National Standard for Electrical Intermediate Metal Conduit (EIMC) Copyright National Electrical Manufacturers Association Provided by IHS under license with NEMANot for ResaleNo reproduction or networking permitted without license from IHS-,-,-Copyright National Electrical
2、 Manufacturers Association Provided by IHS under license with NEMANot for ResaleNo reproduction or networking permitted without license from IHS-,-,-ANSI C80.6-2005 Revision of ANSI C80.6-1994 American National Standard For Electrical Intermediate Metal Conduit (EIMC) Secretariat: National Electrica
3、l Manufacturers Association Approved September 16, 2005 American National Standards Institute, Inc. Copyright National Electrical Manufacturers Association Provided by IHS under license with NEMANot for ResaleNo reproduction or networking permitted without license from IHS-,-,-ANSI C80.6-2005 NOTICE
4、 AND DISCLAIMER The information in this publication was considered technically sound by the consensus of persons engaged in the development and approval of the document at the time it was developed. Consensus does not necessarily mean that there is unanimous agreement among every person participatin
5、g in the development of this document. NEMA standards and guideline publications, of which the document contained herein is one, are developed through a voluntary consensus standards development process. This process brings together volunteers and/or seeks out the views of persons who have an intere
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13、ble to NEMA and is solely the responsibility of the certifier or maker of the statement. Copyright National Electrical Manufacturers Association Provided by IHS under license with NEMANot for ResaleNo reproduction or networking permitted without license from IHS-,-,-ANSI C80.6-2005 i AMERICAN NATION
14、AL STANDARD Approval of an American National Standard requires verification by ANSI that the requirements for due process, consensus, and other criteria for approval have been met by the standards developer. Consensus is established when, in the judgment of the ANSI Board of Standards Review, substa
15、ntial agreement has been reached by directly and materially affected interests. Substantial agreement means much more than a simple majority, but not necessarily unanimity. Consensus requires that all views and objections be considered, and that a concerted effort be made toward their resolution. Th
16、e use of American National Standards is completely voluntary; their existence does not in any respect preclude anyone, whether he has approved the standards or not, from manufacturing, marketing, purchasing, or using products, processes, or procedures not conforming to the standards. The American Na
17、tional Standards Institute does not develop standards and will in no circumstances give an interpretation of any American National Standard. Moreover, no person shall have the right or authority to issue an interpretation of an American National Standard in the name of the American National Standard
18、s Institute. Requests for interpretations should be addressed to the secretariat or sponsor whose name appears on the title page of this standard. Caution Notice: This American National Standard may be revised or withdrawn at any time. The procedures of the American National Standards Institute requ
19、ire that action be taken periodically to reaffirm, revise, or withdraw this standard. Purchasers of American National Standards may receive current information on all standards by calling or writing the American National Standards Institute. Published by National Electrical Manufacturers Association
20、 1300 North 17th Street, Rosslyn, VA 22209 Copyright 2005 by National Electrical Manufacturers Association. All rights reserved including translation into other languages, reserved under the Universal Copyright Convention, the Berne Convention for the Protection of Literary and Artistic Works, and t
21、he International and Pan American Copyright Conventions. No part of this publication may be reproduced in any form, in an electronic retrieval system or otherwise, without the prior written permission of the publisher. Printed in the United States of America Copyright National Electrical Manufacture
22、rs Association Provided by IHS under license with NEMANot for ResaleNo reproduction or networking permitted without license from IHS-,-,-ANSI C80.6-2005 ii This page intentionally left blank.Copyright National Electrical Manufacturers Association Provided by IHS under license with NEMANot for Resale
23、No reproduction or networking permitted without license from IHS-,-,-ANSI C80.6-2005 iii Contents Page Foreword v 1 Scope 1 2 Normative References .1 3 Definitions 2 4 Units of Measurements 2 5 General Requirements.2 5.1 Circular cross section2 5.2 Wall thickness .2 5.3 Interior surface 2 5.4 Weldin
24、g .2 5.5 Cleaning 2 5.6 Protective coating for corrosion resistance.2 5.7 Surface treatment2 6 Detailed Requirements.3 6.1 Exterior coating .3 6.1.1 Zinc coating3 6.1.2 Alternative corrosion resistant coating (ACRC) .3 6.2 Interior coating 3 6.3 Threading and chamfering 3 6.4 Identification3 6.5 Dim
25、ensions .3 6.6 Threads .3 6.7 Couplings 3 6.8 Elbows .4 7 Test Procedures.4 7.1 Bending properties4 7.1.1 Ductility of steel4 7.1.2 Ductility of coatings 5 7.2 Thickness of zinc coating5 7.3 Alternate corrosion resistant coatings (ACRC) .5 7.4 Quality of organic coating for use on interior surface .
26、5 8 Examination of Product6 8.1 Place of inspection6 8.2 Visual inspection of conduit 6 Copyright National Electrical Manufacturers Association Provided by IHS under license with NEMANot for ResaleNo reproduction or networking permitted without license from IHS-,-,-ANSI C80.6-2005 iv 8.3 Retests .6
27、9 Markings .6 9.1 General .6 9.2 Alternate corrosion resistant coating marking.6 9. 3 Supplementary coating marking .7 Tables 1 Dimensions of threads for intermediate metal conduit.7 2 Dimensions of intermediate metal conduit.8 3 Dimensions of couplings 9 4 Minimum acceptable dimensions of elbows an
28、d other bends 10 Figures 1 Test apparatus for bending conduit .5 2 Conduit bend11 Copyright National Electrical Manufacturers Association Provided by IHS under license with NEMANot for ResaleNo reproduction or networking permitted without license from IHS-,-,-ANSI C80.6-2005 v Foreword (This Forewor
29、d is not part of American National Standard C80.6-2005.) This standard was developed by the Accredited Standards Committee on Raceways for Electrical Wiring Systems, C80. The objective of the committee is to produce a comprehensive specification that would establish uniform dimensions and standard c
30、onstruction requirements for Electrical Steel Metal Conduit, Electrical Metallic Tubing, Electrical Intermediate Metal Conduit and Electrical Rigid Aluminum Conduit raceway products and their associated components. The standard was originally approved in 1986 and revised in 1994 and 2005. Suggestion
31、s for improvement of this standard will be welcomed. They should be sent to: National Electrical Manufacturers Association 1300 North 17th Street, Suite1847 Rosslyn, VA 22209. This standard was processed and approved for submittal to ANSI by the Accredited Standards Committee on Raceways for Electri
32、cal Wiring Systems, C80. Committee approval of the standard does not necessarily imply that all committee members voted for its approval. At the time it approved this standard, the C80 Committee had the following members: J. A. Gruber, Chairman J. P.Collins, Jr., Secretary Organization Represented:
33、Name of Representative: Aluminum Association P. Pollak American National Standards Institute H. Benko American Iron and Steel Institute J. A. Gruber American Iron and Steel Institute M. J. Brett, Jr. American Iron and Steel Institute J. Robbins American Pipe Fittings Association D. Thompson Internat
34、ional Association of Electrical Inspectors W. Lilly International Brotherhood of Electrical Workers H. Hickman National Electrical Contractors Association B. Stauffer National Electrical Manufacturers Association A. W. Ballard National Electrical Manufacturers Association S. Blais National Electrica
35、l Manufacturers Association T. McNeive National Electrical Manufacturers Association E. Thompson National Electrical Manufacturers Association J. Dodds Steel Tube Institute K. Carroll Steel Tube Institute G. Scartozzi Underwriters Laboratories, Inc G. Walbrecht Unaffiliated D. Gearing Unaffiliated R
36、. Loyd Unaffiliated H. E. Harper, Jr. Copyright National Electrical Manufacturers Association Provided by IHS under license with NEMANot for ResaleNo reproduction or networking permitted without license from IHS-,-,-ANSI C80.6-2005 vi This page intentionally left blank. Copyright National Electrical
37、 Manufacturers Association Provided by IHS under license with NEMANot for ResaleNo reproduction or networking permitted without license from IHS-,-,-1 For Electrical Intermediate Metal Conduit (EIMC) 1 Scope This standard covers the requirements for steel electrical intermediate metal conduit for us
38、e as a raceway for wires or cables of an electrical system. Finished conduit is produced in nominal 10 ft (3.05 m) lengths, threaded on each end with one coupling attached. It is protected on the exterior surface with a metallic zinc coating or an alternate corrosion protection coating (See UL 1242
39、Third edition Clauses 1.3, 1.4, 16.2, 17, 18, 19, 22.6 and 22.7) and on the interior surface with a zinc or organic coating. This standard also covers conduit couplings, elbows, and conduit lengths other than 10 ft (3.05 m). Properly assembled systems of conduit, couplings, elbows and nipples manufa
40、ctured in accordance with this standard, and other identified fittings, provide for the electrical continuity required of an equipment grounding conductor. 2 Normative References The following standards contain provisions which, through reference in this text, constitute requirements of this America
41、n National Standard. At the time of this publication, the editions indicated were valid. All standards are subject to revision, and parties to agreements based on this American National Standard are encouraged to investigate the possibility of applying the most recent editions of the standards indic
42、ated below unless otherwise specified. ANSI/ASME B1.20.1, Pipe Threads, General Purpose (Inch) ASTM A 239 95(1999), Standard Practice for Locating the thinnest Spot in a Zinc (Galvanized) Coating on Iron or Steel Articles ASTM B 499 96, Standard Test Method for Measurement of Coating Thicknesses by
43、the Magnetic Method: Nonmagnetic Coatings on Magnetic Basis Metals UL 1242, Electrical Intermediate Metal Conduit Steel 3 Definitions 3.1 electrical intermediate metal conduit (EIMC): A threadable steel raceway of circular cross-section designed for the physical protection and routing of conductors
44、and cables and for use as an equipment grounding conductor. 3.2 threaded coupling: .An internally threaded steel cylinder for joining together the components of an EIMC system. 3.3 elbow: A manufactured curved section of EIMC threaded on each end. 3.4 straight conduit: A straight length of EIMC with
45、out a coupling. 3.5 finished conduit: A straight length of EIMC with one coupling attached. AMERICAN NATIONAL STANDARD ANSI C80.6-2005Copyright National Electrical Manufacturers Association Provided by IHS under license with NEMANot for ResaleNo reproduction or networking permitted without license f
46、rom IHS-,-,-ANSI C80.6-2005 2 3.6 alternate corrosion resistant coating (ACRC): A coating(s), other than one consisting solely of zinc, which, upon evaluation, has demonstrated the ability to provide the level of corrosion resistance required on the exterior of conduit. It is not prohibited that the
47、 coatings include zinc. (See UL 1242, third edition, Clauses 1.3, 1.4, 16.2, 17, 18, 19, 22.6 and 22.7.) 4 Units of Measurements The values stated in inch-pound units are to be regarded as the standard. The metric dimensions are exact conversions for safety considerations. 5 General Requirements 5.1
48、 Circular cross section Electrical intermediate metal conduit shall have a circular cross section sufficiently accurate to permit the cutting of threads in accordance with Table 1. 5.2 Wall thickness The wall thickness shall be uniform throughout and in accordance with Table 2. 5.3 Interior surface The interior surface shall be free from injurious defects. 5.4 Welding The welding of all seams shall be continuous and done in a workmanlike manner. 5.5 Cleaning The conduit shall be adequately cleaned before the application of the protective coating. The cleaning proc
