NEMA C80 1-2015 Electrical Rigid Steel Conduit.pdf

1、NEMA Standards PublicationNational Electrical Manufacturers AssociationANSI C80.1-2015Electrical Rigid Steel ConduitANSI C80.1-2015 American National Standard for Electrical Rigid Steel Conduit Secretariat: National Electrical Manufacturers Association Approved July 6, 2015 American National Standar

2、ds Institute, Inc. 2015 National Electrical Manufacturers Association NOTICE 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 necess

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17、 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 Street, Suite 900, Rosslyn, Virgi

18、nia22209 2015 National Electrical Manufacturers Association All rights, 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 and Pan American copyright conventions.

19、 No part of this publication may be reproduced in any form, in an electronic retrieval system or otherwise, without prior written permission from the publisher. Printed in the United States of AmericaANSI C80.1-2015 ii 2015 National Electrical Manufacturers Assocation Foreword (This Foreword is not

20、part of American National Standard C80.1-2015.) 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 will establish uniform dimensions and standard constructio

21、n requirements for Electrical Rigid Steel Conduit, Steel Electrical Metallic Tubing, Electrical Intermediate Metal Conduit, and Electrical Aluminum Rigid Conduit raceway products and their associated components. This standard was originally approved in 1950 and revised in 1953, 1959, 1963, 1966, 197

22、7, 1983, 1990, 1994, 2004, and 2005. Suggestions for improvement of this standard are welcome. They should be sent to: National Electrical Manufacturers Association 1300 North 17th Street, Suite 900 Rosslyn, VA 22209 This standard was processed and approved for submittal to ANSI by the Accredited St

23、andards Committee (ASC C80), Raceways for Electrical Wiring Systems. 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: M. J. Brett, Jr, Chairman J. G. So

24、lis, Secretary Organization Represented: Name of Representative: Allied Tube both of which shall comply with the requirements of this specification. 9 Markings 9.1 GENERAL 9.1.1 Each length of conduit, elbow, and nipple shall be marked “Rigid Steel Conduit,” along with the manufacturers name, trade

25、name or trademark, or other descriptive marking by which the organization responsible for the product can be identified. A traceable code can be used to identify the manufacturer when a private labeler uses its own brand or trademark on the product. When a product is produced in more than one factor

26、y, each finished length of conduit, elbow, and nipple shall bear a distinctive marking by which it can be identified as the product of a particular factory. This marking may be in code. Additionally, each piece shall be legibly and durably marked “Consult manufacturer for proper installation” or equ

27、ivalent wording. 9.1.2 Nipples with unthreaded areas less than 2 in. (51 mm) long may be marked with the requirements of 9.1.1 on the smallest unit of shipping carton. 9.1.3 Each coupling shall be die-stamped “EC” (electrical coupling) in letters not less than in. (3 mm) high. 9.1.4 Conduit marking

28、shall be at minimum once every 10 ft (3.05 m) and no less than once every piece. 9.2 SUPPLEMENTARY COATING MARKING Finished conduit, elbows, and nipples provided with supplementary coating(s) not evaluated for providing corrosion resistance for the conduit shall be marked “Corrosion protection prope

29、rties of the Insert type of supplementary coating applied coating were not investigated” or equivalent wording. ANSI C80.1-2004 2015 National Electrical Manufacturers Association 7 Table 1 Dimensions of Threads for Electrical Rigid Steel Conduit English Units SI (Metric) Units Trade Size Threads per

30、 Inch Pitch Diameter at End of Thread Eo, Taper in. per ft b Length of Thread (in.) Metric Designator Threads per 25.4 mm Pitch Diameter at End of Thread Eo, Taper 62.5 mm per Meter b Length of Thread (mm) Effective L2Overall L4 a Effective L2Overall L4 a 14 0.758 0.53 0.78 16 14 19.3 13.5 19.8 14 0

31、.968 0.55 0.79 21 14 24.6 14.0 20.1 1 11 1.214 0.68 0.98 27 11 30.8 17.3 24.9 1 11 1.557 0.71 1.01 35 11 39.5 18.0 25.7 1 11 1.796 0.72 1.03 41 11 45.6 18.3 26.2 2 11 2.269 0.76 1.06 53 11 57.6 19.3 26.9 2 8 2.720 1.14 1.57 63 8 69.1 29.0 39.9 3 8 3.341 1.20 1.63 78 8 84.9 30.5 41.4 3 8 3.838 1.25 1

32、.68 91 8 97.5 31.8 42.7 4 8 4.334 1.30 1.73 103 8 110.1 33.0 43.9 5 8 5.391 1.41 1.84 129 8 136.9 35.8 46.7 6 8 6.446 1.51 1.95 155 8 163.7 38.4 49.5 NOTEApplicable tolerances: a Thread length (L4): +1 thread, recommended practice +0, -1 b Pitch diameter: +1 turn is the maximum variation permitted f

33、rom the gauging face of the working thread gauges ANSI C80.1-2004 8 2015 National Electrical Manufacturers Association Table 2 Dimensions and Weights for Rigid Steel Conduit English Units Trade Size Nominal Inside Diameter (in.) 3 Outside Diameter (in.) Nominal Wall Thickness (in.) Length Without Co

34、upling 1 (ft and in.) Minimum Weight of Ten Unit Lengths with Couplings Attached (lb) 2 0.632 0.840 0.104 911” 79.0 0.836 1.050 0.107 911” 105.0 1 1.063 1.315 0.126 911” 153.0 1 1.394 1.660 0.133 911” 201.0 1 1.624 1.900 0.138 911” 249.0 2 2.083 2.375 0.146 911” 332.0 2 2.489 2.875 0.193 910” 527.0

35、3 3.090 3.500 0.205 910” 682.6 3 3.570 4.000 0.215 910” 831.0 4 4.050 4.500 0.225 910” 972.3 5 5.073 5.563 0.245 910” 1313.6 6 6.093 6.625 0.266 910” 1745.3 SI (Metric) Units Metric Designator Nominal Inside Diameter (mm) 3 Outside Diameter (mm) Nominal Wall Thickness (mm) Length Without Coupling (m

36、m) 1 Minimum Weight of Ten Unit Lengths with Couplings Attached (kg) 2 16 16.1 21.3 2.6 3030 35.83 21 21.2 26.7 2.7 3030 47.63 27 27.0 33.4 3.2 3025 69.40 35 35.4 42.2 3.4 3025 91.17 41 41.2 48.3 3.5 3025 112.95 53 52.9 60.3 3.7 3025 150.60 63 63.2 73.0 4.9 3010 239.05 78 78.5 88.9 5.2 3010 309.63 9

37、1 90.7 101.6 5.5 3005 376.94 103 102.9 114.3 5.7 3005 441.04 129 128.9 141.3 6.2 2995 595.85 155 154.8 168.3 6.8 2995 791.67 NOTES 1Straight Conduit 2Finished Conduit 3Inside dimensions are not a requirement. However, conduit meeting the required weight and Outside Diameter will nominally have the r

38、eferenced dimensions. Applicable tolerances: Length: + in. (6.35 mm) without coupling Outside Diameter: for trade sizes (16) through 1 (41): +0.015 in. (+0.38 mm); for trade sizes 2 (53) through 6 (155): 1% Wall Thickness: See 8. 4. ANSI C80.1-2004 2015 National Electrical Manufacturers Association

39、9 Table 3 Dimensions of Couplings English Units Trade Size Outside Diameter 1 (in.) Minimum Length (in.) Pitch Diameter (in.) Chamfer Diameter (in.) Minimum Maximum Minimum Maximum 1.010 1 0.801 0.814 0.798 0.838 1.250 141/641.011 1.024 1.008 1.048 1 1.525 131/321.267 1.283 1.260 1.300 1 1.869 21/32

40、1.612 1.628 1.605 1.645 1 2.155 21/161.852 1.868 1.845 1.885 2 2.650 2 2.327 2.343 2.320 2.360 2 3.250 33/162.806 2.828 2.800 2.860 3 3.870 35/163.431 3.453 3.425 3.485 3 4.500 313/323. 931 3.953 3.925 3.985 4 4.875 333/644.431 4.453 4.425 4.485 5 6.000 361/645.494 5.516 5.519 5.579 6 7.200 4 6.556

41、6.578 6.591 6.651 SI (Metric) Units Metric Designator Outside Diameter 1 (mm) Minimum Length (mm) Pitch Diameter (mm) Chamfer Diameter (mm) Minimum Maximum Minimum Maximum 16 25.7 41.3 20.35 20.68 20.27 21.29 21 31.8 41.7 25.68 26.01 25.60 26.62 27 38.7 50.0 32.18 32.59 32.00 33.02 35 47.5 51.6 40.9

42、4 41.35 40.77 41.78 41 54.7 52.4 47.04 47.45 46.86 47.88 53 67.3 54.0 59.11 59.51 58.93 59.94 63 82.6 81.0 71.27 71.83 71.12 72.64 78 98.3 84.1 87.15 87.71 87.00 88.52 91 114.3 86.5 99.85 100.40 99.70 101.20 103 123.8 89.3 112.60 113.10 112.40 113.90 129 152.4 100 139.60 140.10 140.20 141.70 155 182

43、.9 108 166.50 167.10 167.40 168.90 NOTES 1Outside diameter tolerances: Plus tolerances: No requirements Minus tolerances: for trade sizes smaller than 1 (35): 1/64in. (-0.40 mm); for trade sizes 1 (35) and larger: -1%. Chamfer angle shall be between 11 and 15 degrees. All couplings shall have straig

44、ht-tapped threads. ANSI C80.1-2004 10 2015 National Electrical Manufacturers Association Table 4 Dimensions of 90-Degree Elbows and Weights of Nipples per Hundred English Units SI (Metric) Units Trade Size Elbows Nipples Metric Designator Elbows Nipples Minimum Radius to Center of Conduit (in.) Mini

45、mum Straight Length Lsat Each End (in.) A lb/in B lb/100 Minimum Radius to Center of Conduit (mm) Minimum Straight Length Lsat Each End (mm) A Kg/ mm B Kg/100 4 1 0.065 3 16 102 38 0.0012 1.36 4 1 0.086 4 21 114 38 0.0015 1.81 1 5 1 0.125 9 27 146 48 0.0022 4.08 1 7 2 0.164 10 35 184 51 0.0029 4.54

46、1 8 2 0.202 11 41 210 51 0.0036 4.99 2 9 2 0.269 14 53 241 51 0.0048 6.35 2 10 3 0.430 60 63 267 76 0.0077 27.22 3 13 3 0.561 70 78 330 79 0.0100 31.75 3 15 3 0.663 90 91 381 83 0.0119 40.82 4 16 3 0.786 115 103 406 86 0.0141 52.16 5 24 3 1.060 170 129 610 92 0.0190 77.11 6 30 3 1.410 200 155 762 95

47、 0.0252 90.72 NOTEEach lot of 100 nipples shall weigh not less than the number of pounds (kg) determined by the formula: W = 100 * (LA) - B where: W is the unit weight of 100 nipples L is the length of one nipple A is the nipple weight per unit length B is the weight lost in threading 100 nipples NATIONAL ELECTRICAL MANUFACTURERS ASSOCIATION 1300 NORTH 17TH STREET, SUITE 900 ROSSLYN. VA 22209www.NEMA.orgTO ORDER ADDITIONAL NEMA STANDARDS VISITWWW.GLOBAL.IHS.COM OR CALL 1-800-854-7179/1-303-397-79565612_0514TB