1、 ANSI C80.1-2005 American National Standard for Electrical Rigid Steel Conduit (ERSC) 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 Manufa
2、cturers Association Provided by IHS under license with NEMANot for ResaleNo reproduction or networking permitted without license from IHS-,-,-ANSI C80.1-2005 Revision of ANSI C80.1-1994 American National Standard For Electrical Rigid Steel Conduit (ERSC) Secretariat: National Electrical Manufacturer
3、s Association Approved August 18, 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 C80.1-2005 NOTICE AND DISCLAIMER T
4、he 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 participating in the developm
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14、val 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, substantial agreement h
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18、ests 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 Caution Notice: This American National Standard may be revised or withdrawn at any time.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 require that action b
19、e 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 1300 North 17th
20、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 the International a
21、nd 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 Manufacturers Association Pro
22、vided by IHS under license with NEMANot for ResaleNo reproduction or networking permitted without license from IHS-,-,-ANSI C80.1-2005 ii This page intentionally left blank.Copyright National Electrical Manufacturers Association Provided by IHS under license with NEMANot for ResaleNo reproduction or
23、 networking permitted without license from IHS-,-,-ANSI C80.1-2005 iii Contents Page Foreword v 1 Scope 1 2 Normative References .1 3 Definitions 1 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 Welding .2 5.5 Cleaning
24、2 5.6 Protective coating for corrosion resistance.2 5.7 Surface treatments3 6 Detailed Requirements.3 6.1 Exterior coating .3 6.1.1 Zinc coating3 6.1.2 Alternate Corrosion Resistant Coating .3 6.2 Interior coating 3 6.3 Threading and chamfering 3 6.4 Identification3 6.5 Dimensions .3 6.6 Threads .3
25、6.7 Couplings 3 6.8 Elbows and nipples .4 7 Test Procedures.4 7.1 Bending properties4 7.1.1 Ductility of steel4 7.1.2 Ductility of coating at ambient temperature .4 7.2 Thickness of zinc coating5 7.3 Alternate corrosion resistant coatings (ACRC) 5 7.4 Quality of organic coating for use on interior s
26、urface5 Copyright National Electrical Manufacturers Association Provided by IHS under license with NEMANot for ResaleNo reproduction or networking permitted without license from IHS-,-,-ANSI C80.1-2005 iv 8 Examination of Product6 8.1 Place of inspection6 8.2 Visual inspection of conduit 6 8.3 Visua
27、l inspection of elbows6 8.4 Restrictions on localized surface imperfections6 8.5 Retests .6 9 Markings .6 9.1 General .6 9.2 Alternate corrosion resistant coating marking.7 9.3 Supplementary coating marking .7 Tables 1 Dimensions of threads for rigid steel conduit.8 2 Dimensions and weights for rigi
28、d steel conduit9 3 Dimensions of couplings 10 4 Dimensions of 90-degree elbows and weights of nipples per hundred .11 Figures 1 Test apparatus for bending conduit .5 Copyright National Electrical Manufacturers Association Provided by IHS under license with NEMANot for ResaleNo reproduction or networ
29、king permitted without license from IHS-,-,-ANSI C80.1-2005 v Foreword (This Foreword is not part of American National Standard C80.1-2005.) This standard was developed by the Accredited Standards Committee on Raceways for Electrical Wiring Systems, C80. The objective of the committee is to produce
30、a comprehensive specification that would establish uniform dimensions and standard construction requirements for Electrical Rigid Steel Conduit, Steel Electrical Metallic Tubing, Electrical Intermediate Metal Conduit and Electrical Aluminum Rigid Conduit raceway products and their associated compone
31、nts. The standard was originally approved in 1950 and revised in 1953, 1959, 1963, 1966, 1977, 1983, 1990, 1994 and 2005. Suggestions for improvement of this standard will be welcomed. They should be sent to: National Electrical Manufacturers Association 1300 North 17th Street, Suite 1847 Rosslyn, V
32、A 22209. This standard was processed and approved for submittal to ANSI by the Accredited Standards Committee on Raceways for Electrical 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
33、standard, the C80 Committee had the following members: J. A. Gruber, Chairman J. P. Collins, Jr., Secretary Organization Represented: Name of Representative: Aluminum Association P. Pollak American National Standards Institute H. Benko American Iron and Steel Institute J. A. Gruber American Iron and
34、 Steel Institute M. J. Brett, Jr. American Iron and Steel Institute J. Robbins American Pipe Fittings Association D. Thompson International Association of Electrical Inspectors W. Lilly International Brotherhood of Electrical Workers H. Hickman National Electrical Contractors Association B. Stauffer
35、 National Electrical Manufacturers Association A. W. Ballard National Electrical Manufacturers Association S. Blais National Electrical Manufacturers Association T. McNeive National Electrical Manufacturers Association E. Thompson National Electrical Manufacturers Association J. Dodds Steel Tube Ins
36、titute K. Carroll Steel Tube Institute G. Scartozzi Underwriters Laboratories, Inc G. Walbrecht Unaffiliated D. Gearing Unaffiliated R. Loyd Unaffiliated H. E. Harper, Jr. Copyright National Electrical Manufacturers Association Provided by IHS under license with NEMANot for ResaleNo reproduction or
37、networking permitted without license from IHS-,-,-ANSI C80.1-2005 vi This page intentionally left blank.Copyright National Electrical Manufacturers Association Provided by IHS under license with NEMANot for ResaleNo reproduction or networking permitted without license from IHS-,-,-1 For Electrical R
38、igid Steel Conduit (ERSC) 1 Scope This standard covers the requirements for electrical rigid steel conduit for use 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 protecte
39、d on the exterior surface with a metallic zinc coating or alternate corrosion protection coating (as specified in the 13thedition of UL 6 in Clauses 5.3.3, 6.2.4, 7.8 and 7.9) and on the interior surface with a zinc or organic coating. This standard also covers conduit couplings, elbows, nipples and
40、 conduit lengths other than 10 ft (3.05 m). Properly assembled systems of conduit, couplings, elbows and nipples, manufactured in accordance with this standard, and other identified fittings provide for the electrical continuity required of an equipment grounding conductor. 2 Normative References Th
41、e following standards contain provisions which, through reference in this text, constitute requirements of this American National Standard. At the time of publication, the editions indicated were valid. All standards are subject to revision, and parties to agreements based on this American National
42、Standard are encouraged to investigate the possibility of applying the most recent editions of the standards indicated 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 (Galvanize
43、d) Coating on Iron or Steel Articles ASTM B 499 96, Standard Test Method for Measurement of Coating Thicknesses by the Magnetic Method: Nonmagnetic Coatings on Magnetic Basis Metals UL 6, Electrical Rigid Metal Conduit - Steel 3 Definitions 3.1 electrical rigid steel conduit (ERSC): A threadable ste
44、el raceway of circular cross-section designed for the physical protection and routing of wire conductors and use as an equipment grounding conductor. 3.2 threaded coupling: An internally threaded steel cylinder for joining together the components of an ERSC system. 3.3 elbow: A manufactured curved s
45、ection of ERSC threaded on each end. AMERICAN NATIONAL STANDARD ANSI C80.1-2005Copyright National Electrical Manufacturers Association Provided by IHS under license with NEMANot for ResaleNo reproduction or networking permitted without license from IHS-,-,-ANSI C80.1-2005 2 3.4 nipple: A straight le
46、ngth of ERSC not more than 2 ft (0.61 m) long and threaded on each end. 3.5 straight conduit: A straight length of ERSC without a coupling. 3.6 finished conduit: A straight length of ERSC with one coupling attached. 3.7 alternate corrosion resistant coating (ACRC): A coating(s), other than one consi
47、sting 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 coatings include zinc (as specified in the 13th edition of UL 6 in Clauses 5.3.3, 6.2.4, 7.8 and 7.9). 4 Units of
48、 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 Circular cross section Electrical rigid steel 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 except for localized surface imperfections as permitted in 8. 4. 5.3 Interior surface The interior surface shall be free from injurious defects. 5.4 W
