1、NEMA Standards PublicationNational Electrical Manufacturers AssociationNEMA TC 2-2013Electrical Polyvinyl Chloride (PVC) ConduitNEMA TC 2-2013 Electrical Polyvinyl Chloride (PVC) Conduit NEMA TC 2-2013 Electrical Polyvinyl Chloride (PVC) Conduit Published by: National Electrical Manufacturers Associ
2、ation 1300 North 17th Street, Suite 900 Rosslyn, Virginia 22209-3801 www.nema.org 2013 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 Art
3、istic Works, and the International and Pan American copyright conventions. 2013 National Electrical Manufacturers Association NOTICE AND DISCLAIMER The information in this publication was considered technically sound by a consensus among persons engaged in its development at the time it was approved
4、. Consensus does not necessarily mean there was unanimous agreement among every person participating in the development process. The National Electrical Manufacturers Association (NEMA) standards and guideline publications, of which the document herein is one, are developed through a voluntary stand
5、ards development process. This process brings together volunteers and/or seeks out the views of persons who have an interest in the topic covered by this publication. Although NEMA administers the process and establishes rules to promote fairness in the development of consensus, it does not write th
6、e documents, nor does it independently test, evaluate, or verify the accuracy or completeness of any information or the soundness of any judgments contained in its standards and guideline publications. NEMA disclaims liability for any personal injury, property, or other damages of any nature, whethe
7、r special, indirect, consequential, or compensatory, directly or indirectly resulting from the publication, use of, application, or reliance on this document. NEMA disclaims and makes no guaranty or warranty, express or implied, as to the accuracy or completeness of any information published herein,
8、 and disclaims and makes no warranty that the information in this document will fulfill any particular purpose(s) or need(s). NEMA does not undertake to guarantee the performance of any individual manufacturers or sellers products or services by virtue of this standard or guide. In publishing and ma
9、king this document available, NEMA is not undertaking to render professional or other services for or on behalf of any person or entity, nor is NEMA undertaking to perform any duty owed by any person or entity to someone else. Anyone using this document should rely on his or her own independent judg
10、ment or, as appropriate, seek the advice of a competent professional in determining the exercise of reasonable care in any given circumstance. Information and other standards on the topic covered by this publication may be available from other sources, which the user may wish to consult for addition
11、al views or information not covered by this publication. NEMA has no power, nor does it undertake to police or enforce compliance with the contents of this document. NEMA does not certify, test, or inspect products, designs, or installations for safety or health purposes. Any certification or other
12、statement of compliance with any health- or safety-related information in this document shall not be attributable to NEMA and is solely the responsibility of the certifier or maker of the statement. TC 2-2013 Page i 2013 National Electrical Manufacturers Association TABLE OF CONTENTS Page Section 1
13、GENERAL 1 1.1 Scope 1 1.2 Referenced Standards 1 Section 2 DEFINITIONS3 2.1 Definitions.3 Section 3 GENERAL REQUIREMENTS 4 3.1 Materials 4 3.1.1 Electrical Polyvinyl Chloride (PVC) Conduit (EPC) .4 3.1.2 Solvent Cements 4 3.2 Color4 3.3 Dimensions and Lengths.4 3.3.1 Average Outside Diameter .4 3.3.
14、2 Out-of-Roundness 4 3.3.3 Wall Thickness .4 3.3.4 Conduit Length.4 3.3.5 Minimum Inside Diameter 4 3.4 Joints .5 3.4.1 Molded Couplings .5 3.4.2 Integral Belled Ends 5 3.5 Inspections .5 Section 4 PERFORMANCE REQUIREMENTS .8 4.1 Qualification Tests .8 4.1.1 Definition .8 4.1.2 Deflection Resistance
15、8 4.1.3 Leakage at Solvent-Cemented Joints.8 4.2 Quality Control Tests 8 4.2.1 Definition .8 4.2.2 Conditioning.8 4.2.3 Dimensions8 4.2.4 Flattening 8 4.2.5 Workmanship .8 4.2.6 Impact Resistance 8 Section 5 TEST METHODS . 11 5.1 Conditioning, Test Conditions, and Sampling . 11 5.1.1 Conditioning Te
16、st Specimens . 11 5.1.2 Test Conditions 11 5.1.3 Sampling . 11 5.2 Dimensions . 11 5.2.1 Maximum and Minimum Outside Diameter (Out-of-Roundness) . 11 5.2.2 Outside Diameter (Average) . 11 5.2.3 Wall Thickness . 11 5.2.4 Minimum Inside Diameter 11 5.3 Deflection Resistance . 11 5.4 Leakage at Solvent
17、 Cemented Joints 11 5.5 Flattening . 11 5.6 Impact Resistance . 12 Annex A OUT OF ROUNDNESS GAUGES AND GO/NO-GO GAUGES 14 TC 2-2013 Page ii 2013 National Electrical Manufacturers Association TABLES Page Table 3-1 Sizes and Dimensions of EPC . 6 Table 3-2 Dimensions of Integral Belled Ends 7 Table 4-
18、1 Load for Deflection Resistance 9 Table 4-2 Load for Impact Resistance . Error! Bookmark not defined. Table A-1 Out of Roundness (Ovality) Gauges for EPC-40 and EPC-80 13 Table A-2 Go/No-Go Gauges for EPC-40 and EPC-8 .14 TC 2-2013 Page iii 2013 National Electrical Manufacturers Association FOREWOR
19、D The purpose of this publication for electrical polyvinyl chloride (PVC) conduit (EPC) for above-ground and below-ground use is: a) To list dimensions and other significant requirements. b) To set forth some of the properties of these products and to assist in selecting and obtaining the proper pro
20、duct for a particular need. User needs have been considered throughout the development and revision of this standard. The Polymer Raceway Products Section of NEMA, through its members, has worked (and continues to work) closely with such organizations as the American Society for Testing and Material
21、s, the Plastics Pipe Institute, Plastic Pipe and Fittings Association, appropriate government agencies, Underwriters Laboratories, Inc., and others in the periodic review and revision of these standards for any changes necessary to keep them up-to-date with advancing technology. Proposed or recommen
22、ded revisions should be submitted to: Senior Technical Director, Operations National Electrical Manufacturers Association 1300 North 17th Street, Suite 900 Rosslyn, Virginia 22209-3801 NEMA TC 2-2013 revises and supersedes the NEMA Standards Publication for Electrical Plastic Tubing (EPT) and Condui
23、t (EPC-40 and EPC-80), NEMA TC 2-2003. This publication was developed by the Polymer Raceway Products Section. Section approval of the standard does not necessarily imply that all section members voted for its approval or participated in its development. The following member companies of the section
24、 contributed to this revision of TC 2: Anamet Eletrical, Inc. Mattoon, IL Atkore AFC Cable Systems New Bedford, MA Atkore Allied Tube and Conduit Harvey, IL Champion Fiberglass, Inc. Spring, TX FRE Composites Inc. St. Andr-dArgenteuil, PQ, Canada Hubbell Incorporated Shelton, CT IPEX Electrical Inc.
25、 Mississauga, ON, Canada Legrand North America West Hartford, CT Panduit Corporation Tinley Park, IL Royal Pipe Systems Shelby Township, MI South Pipe, Inc. New London, NC Thomas concrete-encased applications or direct burial. May be referred to as “heavy wall.” b) EPC-80Electrical conduit designed
26、for heavy-duty (areas of physical damage) applications aboveground; concrete-encased applications or direct burial. May be referred to as “extra heavy wall.” Note: The values stated in U.S. customary units are to be regarded as the standard. NEMA TC2-2013 does not fully address elbows and fittings.
27、See NEMA TC3-2013. 1.2 REFERENCED STANDARDS In this publication, reference is made to the standards listed below. Copies are available from the indicated sources. Latest edition of these standards should be used unless otherwise specified. American Society for Testing and Materials 100 Barr Harbor D
28、rive West Conshohocken, PA 19428 D 1600 Standard Terminology for Abbreviated Terms Relating to Plastics D 2122 Standard Test Method of Determining Dimensions of Thermoplastic Pipe and Fittings D 2564 Standard Specification for Solvent Cements for Poly (Vinyl Chloride) (PVC) Plastic Piping Systems D
29、618 Standard Practice for Conditioning Plastics for Testing D 883 Standard Terminology Relating to Plastics F 402 Standard Practice for Safe Handling of Solvent Cements, Primers, and Cleaners Used for Joining Thermoplastic Pipe and Fittings F 412 Standard Terminology Relating to Plastic Piping Syste
30、ms F 656 Standard Specification for Primers for Use in Solvent Cement Joints of Poly (Vinyl Chloride) (PVC) Plastic Pipe and Fittings TC 2-2013 Page 2 2013 National Electrical Manufacturers Association National Electrical Manufacturers Association 1300 North 17th Street, Suite 900 Rosslyn, Virginia
31、22209 TC 3 Polyvinyl Chloride (PVC) Fittings for Use with Rigid PVC Conduit and Tubing Users of NEMA TC 2-2013 may also want to refer to the following standards and code: Underwriters Laboratories Inc. 333 Pfingsten Road Northbrook, IL 60062 UL 514B Conduit, Tubing, and Cable Fittings UL 514C Nonmet
32、allic Outlet Boxes, Flush-Device Boxes and Covers UL 651 Schedule 40 and 80 Rigid PVC Conduit and Fittings National Fire Protection Association Batterymarch Park Quincy, MA 02669 NFPA 70 National Electrical Code TC 2-2013 Page 3 2013 National Electrical Manufacturers Association Section 2 DEFINITION
33、S 2.1 DEFINITIONS Definitions of terms used in NEMA TC 2-2013 shall be in accordance with ASTM F 412, ASTM D 883, or both. Abbreviations shall be in accordance with ASTM D 1600, unless otherwise specified. TC 2-2013 Page 4 2013 National Electrical Manufacturers Association Section 3 GENERAL REQUIREM
34、ENTS 3.1 MATERIALS 3.1.1 Electrical Polyvinyl Chloride (PVC) Conduit (EPC) EPC shall be made from polyvinyl chloride (PVC) plastic compound and shall meet the dimensional and physical requirements of NEMA TC 2-2013. Clean, reworked material, and recycled, post-industrial material may be used, provid
35、ed that the EPC produced shall meet the requirements of this standard. 3.1.2 Solvent Cements PVC solvent cements shall be in accordance with ASTM D 2564 or as specified by the manufacturer. PVC primers shall be in accordance with ASTM F 656 or as specified by the manufacturer. ASTM F 402 is referenc
36、ed as recommended practice for safe handling of solvent cements. Note: For cellular/foamed conduit consult the manufacturer for any product specific priming and solvent cement instructions. 3.2 COLOR EPC should be gray in color. Other colors are acceptable if agreed to by the parties involved. 3.3 D
37、IMENSIONS AND LENGTHS Dimensions of EPC shall meet the requirements of Table 3-1 when determined in accordance with section 5.2. Lengths shall be in accordance with section 3.3.4. Trade sizes and metric designators used throughout NEMA TC 2-2013 are for identification purposes only, and are not actu
38、al dimensions. 3.3.1 Average Outside Diameter The average outside diameter of the EPC shall be determined by use of a vernier circumferential wrap tape as defined in ASTM D 2122. 3.3.2 Out-of-Roundness Out-of-roundness of the EPC shall be measured with out-of-roundness gauges specified in Table A-1.
39、 Out-of-roundness tolerance shall apply only at the time of manufacture, not to EPC that has been packaged and placed in yard storage. 3.3.3 Wall Thickness The minimum wall thickness shall be measured at one end of the EPC with a micrometer as defined in ASTM D 2122. 3.3.4 Conduit Length The overall
40、 length, including the integral bell or coupling, is commonly 10 ft 3/4 in. (3.05 m 0.02 m) or 20 ft 1 in. (6.10 m 0.03 m). A tape measure accurate to 1/16 in. ( 1 mm) shall be permitted to be used to measure the length. Other lengths are acceptable if agreed to by the parties involved. 3.3.5 Minimu
41、m Inside Diameter The minimum inside diameter shall be measured at one end of the EPC per section 5.2.4. TC 2-2013 Page 5 2013 National Electrical Manufacturers Association 3.4 JOINTS 3.4.1 Molded Couplings Molded PVC couplings, per NEMA TC 3, may be supplied with EPC. Molded EPC fittings are interc
42、hangeable for use with both EPC-40 and EPC-80. Note: Fabricated EPC fittings are manufactured from either EPC-40 or EPC-80 and should be used with the respective EPC. 3.4.2 Integral Belled Ends EPC may have integral belled ends. The integral belled ends shall be in accordance with the dimensions sho
43、wn in Table 3-2. The length of the integral belled end shall be measured with an instrument accurate to 1/16 in. ( 1 mm). A tape measure or steel rule is adequate. The wall thickness of an integral belled end shall be considered satisfactory if formed from EPC meeting the requirements of this standa
44、rd. Integral belled ends shall be centered to provide a visible shoulder around the entire circumference of the EPC. The integral belled end shall be considered satisfactory if it accepts the go/no-go gauges as specified in Table A-2. . 3.5 INSPECTIONS The manufacturer shall inspect the EPC at time
45、of manufacture for compliance to dimensional and performance requirements of this standard, and for freedom from defects, as defined in Section 4. TC 2-2013 Page 6 2013 National Electrical Manufacturers Association Table 3-1 SIZES AND DIMENSIONS OF EPC U.S. CUSTOMARY UNITS OUTSIDE DIAMETERS (in) WAL
46、L THICKNESS (in) INSIDE DIAMETERS (in) TRADE METRIC EPC-40 EPC-80 EPC-40 EPC-80 SIZE DESIGNATORS AVERAGE MAXIMUM MINIMUM MINIMUM MINIMUM MINIMUM MINIMUM 1/2 16 0.840 0.004 0.848 0.832 0.109 0.147 0.578 0.502 3/4 21 1.050 0.004 1.060 1.040 0.113 0.154 0.780 0.698 1 27 1.315 0.005 1.325 1.305 0.133 0.
47、179 1.004 0.910 1 1/4 35 1.660 0.005 1.672 1.648 0.140 0.191 1.335 1.227 1 1/2 41 1.900 0.006 1.912 1.888 0.145 0.200 1.564 1.446 2 53 2.375 0.006 2.387 2.363 0.154 0.218 2.021 1.881 2 1/2 63 2.875 0.007 2.890 2.860 0.203 0.276 2.414 2.250 3 78 3.500 0.008 3.515 3.485 0.216 0.300 3.008 2.820 3 1/2 9
48、1 4.000 0.008 4.050 3.950 0.226 0.318 3.486 3.280 4 103 4.500 0.009 4.550 4.450 0.237 0.337 3.961 3.737 5 129 5.563 0.010 5.613 5.513 0.258 0.375 4.975 4.713 6 155 6.625 0.011 6.675 6.575 0.280 0.432 5.986 5.646 8 200 8.625 0.015 8.675 8.575 0.322 0.500 7.853 7.455 METRIC UNITS OUTSIDE DIAMETERS (mm
49、) WALL THICKNESS (mm) INSIDE DIAMETERS (mm) TRADE METRIC EPC-40 EPC-80 EPC-40 EPC-80 SIZE DESIGNATORS AVERAGE MAXIMUM MINIMUM MINIMUM MINIMUM MINIMUM MINIMUM 1/2 16 21.34 0.10 21.54 21.13 2.77 3.73 14.68 12.75 3/4 21 26.67 0.10 26.92 26.42 2.87 3.91 19.81 17.72 1 27 33.40 0.31 33.66 33.15 3.38 4.55 25.50 23.11 1 1/4 35 42.16 0.13 42.47 41.86 3.56 4.85 33.90 31.16 1 1/2 41 48.26 0.15 48.56 47.96 3.68 5.08 39.72 36.72 2 53 60.32 0.15 60.63 60.02 3.91 5.54 51.33 47.77 2 1/2 63 73.02 0.18 73.41 72.64
