1、NEMA Standards PublicationNational Electrical Manufacturers AssociationANSI/NEMA WC 53-2016Standard Test Methods for Extruded Dielectric Power, Control, Instrumentation, and Portable Cables for TestApproved as an American National Standard ANSI Approval Date: April, 7, 2016 ANSI/NEMA WC 53 ICEA T-27
2、-581-2016 Standard Test Methods for Extruded Dielectric Power, Control, Instrumentation, and Portable Cables for Test Prepared by: Insulated Cable Engineers Association, Inc. P.O. Box 1568 Carrollton, Georgia 30112 Published by: National Electrical Manufacturers Association 1300 North 17thStreet, Su
3、ite 900 Rosslyn, Virginia 22209 www.nema.org 2016 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
4、 Pan American Copyright Conventions. 2016 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. Consens
5、us does not necessarily mean that there is unanimous agreement among every person participating in the development of this document. The National Electrical Manufacturers Association (NEMA) and the Insulated Cable Engineers Association (ICEA) standards and guideline publications, of which the docume
6、nt contained herein is one, are developed through a voluntary consensus standards development process. This process brings together persons who have an interest in the topic covered by this publication. While NEMA and ICEA administer the process and establish rules to promote fairness in the develop
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9、y information published herein, and disclaims and makes no warranty that the information in this document will fulfill any of your particular purposes or needs. NEMA and ICEA do not undertake to guarantee the performance of any individual manufacturer or sellers products or services by virtue of thi
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11、 this document should rely on his or her own independent judgment or, as appropriate, seek the advice of a competent professional in determining the exercise of reasonable care in any given circumstances. Information and other standards on the topic covered by this publication may be available from
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13、ns, or installations for safety or health purposes. Any certification or other statement of compliance with any health or safety-related information in this document shall not be attributable to NEMA and ICEA and is solely the responsibility of the certifier or maker of the statement. ANSI/NEMA WC 5
14、3/ICEA T-27-581-2016 Page i 2016 National Electrical Manufacturers Association CONTENTS Foreword iv Section 1 General . 1 1.1 Scope 1 1.2 References 1 1.2.1 Normative References 1 Section 2 Electrical Methods . 4 2.1 Conductor dc Resistance 4 2.1.1 Method When Sample Nominal Resistance is 1 Ohm or M
15、ore 4 2.1.2 Method When Sample Nominal Resistance is Less Than 1 Ohm . 4 2.1.3 Precautions for Short Sample Method . 4 2.1.4 Converting Measured Conductor Resistance to Resistance at 25C . 5 2.2 Voltage Tests on Completed Cables . 5 2.2.1 General . 5 2.2.2 ac Voltage Test . 6 2.2.3 dc Voltage Test .
16、 6 2.2.4 Spark Testing . 7 2.3 Insulation Resistance 8 2.3.1 Single Conductor Cables 8 2.3.2 Multiple Conductor Cables . 8 2.3.3 Method to Determine the 1F Coefficient Factor for an Insulation . 8 2.3.4 Converting Insulation Resistance to Insulation Resistance Constant 9 2.4 Dissipation Factor (Df),
17、 Capacitance (C), and Dielectric Constant . 11 2.5 Suitability of Insulation Compounds for Use On Dc Circuits in Wet Locations . 11 2.6 Accelerated Water Absorption Test, Electrical Method at 60 hz (Em-60) . 12 2.7 Dielectric Constant and Voltage Withstand for Nonconducting Stress Control Layers . 1
18、2 2.8 Specific Surface Resistivity . 13 2.9 U-Bend Discharge Resistance 13 2.10 Track Resistance . 13 2.11 Volume Resistivity . 14 2.11.1 Conductor Stress Control . 14 2.11.2 Insulation Shield . 14 2.11.3 Four-electrode Method . 15 2.12 Semiconducting Jacket Radial Resistivity Test . 15 2.12.1 Sampl
19、e Preparation 15 2.12.2 Test Equipment Setup 17 2.12.3 Calculation 17 2.13 Dry Electrical Test for Class III Insulations (Shielded Medium Voltage Only) . 18 2.13.1 Test Samples 18 2.13.2 Test Procedure . 18 2.13.3 Electrical Measurements 18 2.14 Discharge Resistance Test for discharge resistant Insu
20、lation 18 2.14.1 Test Specimens 18 2.14.2 Test Environment . 18 2.14.3 Test Electrodes . 19 2.15 Wet Insulation Resistance Stability (6002000 Volts) . 19 Section 3 Dimensional Methods. . 21 3.1 Conductor Cross-Sectional Area by Diameter Measurements . 21 3.2 Thickness of Components Over a Conductor
21、. 21 3.2.1 Optical Measuring Device Method for Any Component . 21 3.2.2 Micrometer Method for Unbonded Components 21 3.2.3 Extruded Insulation or Insulation Shield or Jacket . 21 3.2.4 Tape 21 3.2.5 Sheath 22 ANSI/NEMA WC 53/ICEA T-27-581-2016 Page ii 2016 National Electrical Manufacturers Associati
22、on 3.2.6 Bedding and Servings 22 3.3 Diameter over Cable Components 22 3.3.1 Micrometer Method for Conductors 22 3.3.2 Method for Any Component Except Conductors 22 3.3.3 Tape Method for Any Component Having a Diameter 0.750 in. (19.1 mm) or Greater 22 3.4 Protrusion and Convolution Measurement 22 S
23、ection 4 Physical Methods 24 4.1 Adhesion (Stripping Force) 24 4.2 Cold Bend 24 4.3 Heat Deformation (Distortion) 24 4.3.1 Insulation Deformation 24 4.3.2 Deformation of Jackets, Insulating and Conducting . 26 4.4 Flexibility Test for Interlocked Armor . 26 4.5 Tear Resistance 26 4.6 Gravimetric Wat
24、er Absorption . 27 4.7 Direction and Length of Lay . 28 4.8 Jacket Irregularity Inspection . 28 4.9 Hot Creep Test 29 4.10 Vertical Tray Flame Test . 29 4.10.1 70,000 BTU 29 4.10.2 210,000 BTU 29 4.11 Physical And Aging Tests for Insulation, Jackets, and Nonmetallic Conducting Materials . 29 4.11.1
25、Sampling . 29 4.11.2 Number of Test Specimens 30 4.11.3 Size and Preparation of Specimens . 30 4.11.4 Calculation for Area of Test Specimens . 30 4.11.5 Physical Test Procedures . 31 4.11.6 Retests 31 4.11.7 Tensile Strength Test . 31 4.11.8 Tensile Stress Test . 31 4.11.9 Elongation Test . 32 4.11.
26、10 Set Test 32 4.11.11 Aging Tests . 32 4.11.12 Physical Tests for Nonmetallic Conducting Materials Intended for Extrusion 33 4.12 Absorption Coefficient . 33 4.13 Heat Shock 33 4.14 Environmental Cracking 33 4.14.1 Test Specimens 34 4.14.2 Test Procedures . 34 4.15 Method For Flexibility Test for C
27、ontinuous Corrugated Armor 34 4.16 Shrinkback Test . 34 4.16.1 Sample Preparation 34 4.16.2 Test Procedure . 34 4.17 Wafer Boil Test for Conductor And Insulation Shields 34 4.18 Extruded Insulation Shield Removeability (Field Strippability) Test 35 4.19 Tightness of Polyethylene Jacket to Sheath Tes
28、t . 35 ANSI/NEMA WC 53/ICEA T-27-581-2016 Page iii 2016 National Electrical Manufacturers Association TABLES Table 1-1 kcmil Equivalent of AWG Conductor Sizes . 3 Table 1-2 Conversion Table 3 Table 2-1 Factors for Converting Measured dc Resistance of Conductors to 5C. 5 Table 2-2 Temperature Correct
29、ion Factors (TCF) for Converting Insulation Resistance to 5.6C 10 Table 2-3 Insulation Resistance Stabilization Period 19 Table 4-1 Load vs. Conductor Size In Heat Deformation Test. . 25 Table 4-2 Jacket Irregularity Inspection 29 Table 4-3 Mandrel Size for Heat Shock Test . 33 FIGURES Figure 2-1 Sa
30、mple Preparation for Radial Resistivity Measurement of Semi-Conducting Jackets 16 Figure 2-2 Circuit for Radial Resistivity Measurement of Semi-Conducting Jackets 17 Figure 3-1 Procedure to Measure Protrusions and Indentations 23 Figure 3-2 Procedure to Measure Convolutions . 23 Figure 4-1 Test Spec
31、imen for Tear Test . 27 ANSI/NEMA WC 53/ICEA T-27-581-2016 Page iv 2016 National Electrical Manufacturers Association Foreword This standards publication, Standard Test Methods Publication for Extruded Dielectric Power, Control, Instrumentation and Portable Cables, was developed by the Insulated Cab
32、le Engineers Association, Inc. (ICEA) and was approved by the National Electrical Manufactures Association (NEMA). ICEA/NEMA standards are adopted in the public interest and are designed to eliminate misunderstandings between the manufacturers and the user and to assist the user in selecting and obt
33、aining the proper product for his or her particular need. The user of this standards publication is cautioned to observe any health or safety regulations and rules relative to the use of the test procedures covered by this document. Requests for interpretation of this standard must be submitted in w
34、riting to: Insulated Cable Engineers Association, Inc. P.O.Box 2694 Alpharetta, Georgia 30023 An official written interpretation will be made by ICEA. Suggestions for improvements gained in the use of this publication will be welcomed by the Association. ANSI/NEMA WC 53/ICEA T-27-581-2016 Page 1 201
35、6 National Electrical Manufacturers Association Section 1 General 1.1 Scope This standard applies to the testing of extruded dielectric insulated power, control, instrumentation, and portable cables. 1.2 References Included in this standard are many, but not all, of the test methods to which referen
36、ce is made in ICEA/NEMA standards for cables. For undated references, the reference shall be to the latest issue. Copies of the following documents may be obtained from the appropriate source as follows: 1.2.1 Normative References American Society for Testing and Materials (ASTM) 100 Barr Harbor Dri
37、ve West Conshohocken, PA 19428-2959 ASTM B 193-02 Test Method for Resistivity of Electrical Conductor Materials ASTM D257-07 DC Resistance or Conductance of Insulating Materials, Test Method for ASTM D412-15a Standard Test Methods for Vulcanized Rubber and Thermoplastic Elastomers Tension ASTM D471-
38、12 Standard Test Method for Rubber Property Effect of Liquids ASTM D746-07 Standard Test Methods for Brittleness Temperature of Plastics and Elastomers by Impact ASTM D2132-12 Standard Test Method for Dust-and-Fog Tracking and Erosion Resistance of Electrical Insulating Materials ASTM D2275-01 Stand
39、ard Test Method for Voltage Endurance of Solid Electrical Insulating Materials Subjected to Partial Discharge (Corona) on the Surface ASTM D2765-01 Standard Test Method for Determination of Gel Content and Swell Ratio of Crosslinked Ethylene Plastics ASTM D3349-12 Standard Test Method for Absorption
40、 Coefficient of Ethylene Polymer Material Pigmented with Carbon Black Global Engineering Documents 15 Inverness Way East Englewood, CO 80112-5776 ICEA T-28-562 Test Methods for Measurement of Hot Creep of Polymeric Insulations ICEA T-29-520 Procedure for Conducting Vertical Cable Tray Flame Tests wi
41、th a Theoretical Heat Input Rate of 210,000 B.T.U./Hour ICEA T-30-520 Conducting Vertical Cable Tray Flame Tests with a Theoretical Heat Input Rate of 70,000 B.T.U./Hour ICEA T-24-380 Partial Discharge Test Procedure ICEA T-25-425 Guide for Establishing Stability of Volume Resistivity of Conducting
42、Polymeric Component of Power Cables ANSI/NEMA WC 53/ICEA T-27-581-2016 Page 2 2016 National Electrical Manufacturers Association ANSI/NEMA WC 54/ICEA T-26-465 Guide for Frequency of Sampling Extruded Dielectric Power, Control, Instrumentation, and Portable Cables for Test ICEA T-28-562 Test Method f
43、or Measurement of Hot Creep of Polymeric Insulations ICEA T-31-610 Test Method for Conducting Longitudinal Water Penetration Resistance Tests on Blocked Conductors ICEA T-32-645 Test Method for Establishing Volume Resistivity Compatibility of Water Blocking Components With Extruded Semiconducting Sh
44、ield Materials ICEA T-34-664 Test Method for Conducting a Longitudinal Water Penetration Resistance Tests on Longitudinal Water Blocked Cables National Technical Information Service U.S. Department of Commerce Springfield, VA 22161 National Bureau of Standards Handbook No. 100 Copper Wire Tables (Fe
45、bruary 4, 1966) National Bureau of Standards Handbook No. 109 Aluminum Wire Tables (February 1972) Not all the tests mentioned above are relevant for a given cable design or a given application. A few specialized test methods are described in ICEA Standard Publication S-94-649, Standard for Concentr
46、ic Neutral Cables Rated 5,00046,000 Volts. When a procedure for measuring a specified parameter is not specified, that parameter shall be determined by any suitable means. When another standard is referenced in this document, its title and date of issue may be found in Section 1. The reference is on
47、ly to that specified document. In this standard, temperatures are expressed in degrees Celsius, weights in grams, and metal resistivities in nanoohm-meters. Other properties are expressed in U.S. customary units throughout this standard. Approximate International System of Units (SI) equivalents are
48、 included for information only. Room temperature is defined as 25 5oC. Where this temperature range cannot be maintained, (test) measurements may be made at the prevailing ambient room temperature, which shall be recorded. The Fahrenheit equivalents for Celsius degrees may be calculated by the equat
49、ion 32deg8.1deg +=CF The ounce equivalents to grams may be calculated by dividing the number of grams by 28.4. The ohm cmil per ft. equivalents to nanoohm-meter may be calculated by multiplying the nanoohm-meter value by 0.602. ANSI/NEMA WC 53/ICEA T-27-581-2016 Page 3 2016 National Electrical Manufacturers Association Conductor size is expressed in cross-sectional area in thousand circular mils (kcmil). For convenience, in the text and tables, only the equivalent AWG size is used fo
