1、 Approved as an American National Standard ANSI Approval Date: April, 7, 2016 ANSI/NEMA WC 53 ICEA T-27-581-2016 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 Carrollt
2、on, Georgia 30112 Published by: National Electrical Manufacturers Association 1300 North 17thStreet, Suite 900 Rosslyn, Virginia 22209 www.nema.org 2016 National Electrical Manufacturers Association. All rights including translation into other languages, reserved under the Universal Copyright Conven
3、tion, the Berne Convention for the Protection of Literary and Artistic Works, and the International and Pan American Copyright Conventions. 2016 National Electrical Manufacturers Association NOTICE AND DISCLAIMER The information in this publication was considered technically sound by the consensus o
4、f 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 development of this document. The National Electrical Manufacturers Association (NEMA) and the
5、 Insulated Cable Engineers Association (ICEA) 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 persons who have an interest in the topic covered by this publica
6、tion. While NEMA and ICEA administer the process and establish rules to promote fairness in the development of consensus, they do not independently test, evaluate, or verify the accuracy or completeness of any information or the soundness of any judgements contained in its standards and guideline pu
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10、EMA and ICEA 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 judgment or, as appropriate, seek the advice of a competent professional in determining the exercise of reasonable care in any given circums
11、tances. 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 additional views or information not covered by this publication. NEMA and ICEA have no power, nor do they undertake to police or enforce compli
12、ance with the contents of this document. NEMA and ICEA do not certify, test, or inspect products, designs, 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 NE
13、MA and ICEA and is solely the responsibility of the certifier or maker of the statement. ANSI/NEMA WC 53/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 Electri
14、cal Methods . 4 2.1 Conductor dc Resistance 4 2.1.1 Method When Sample Nominal Resistance is 1 Ohm or More 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 Vo
15、ltage Tests on Completed Cables . 5 2.2.1 General . 5 2.2.2 ac Voltage Test . 6 2.2.3 dc Voltage Test . 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
16、2.3.4 Converting Insulation Resistance to Insulation Resistance Constant 9 2.4 Dissipation Factor (Df), 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
17、 (Em-60) . 12 2.7 Dielectric Constant and Voltage Withstand for Nonconducting Stress Control Layers . 12 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
18、 2.11.3 Four-electrode Method . 15 2.12 Semiconducting Jacket Radial Resistivity Test . 15 2.12.1 Sample 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 Proce
19、dure . 18 2.13.3 Electrical Measurements 18 2.14 Discharge Resistance Test for discharge resistant Insulation 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 Con
20、ductor Cross-Sectional Area by Diameter Measurements . 21 3.2 Thickness of Components Over a Conductor . 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.
21、5 Sheath 22 ANSI/NEMA WC 53/ICEA T-27-581-2016 Page ii 2016 National Electrical Manufacturers Association 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 Compon
22、ent Having a Diameter 0.750 in. (19.1 mm) or Greater 22 3.4 Protrusion and Convolution Measurement 22 Section 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 Con
23、ducting . 26 4.4 Flexibility Test for Interlocked Armor . 26 4.5 Tear Resistance 26 4.6 Gravimetric Water 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
24、.11 Physical And Aging Tests for Insulation, Jackets, and Nonmetallic Conducting Materials . 29 4.11.1 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
25、 31 4.11.7 Tensile Strength Test . 31 4.11.8 Tensile Stress Test . 31 4.11.9 Elongation Test . 32 4.11.10 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
26、Cracking 33 4.14.1 Test Specimens 34 4.14.2 Test Procedures . 34 4.15 Method For Flexibility Test for Continuous 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
27、 Shield Removeability (Field Strippability) Test 35 4.19 Tightness of Polyethylene Jacket to Sheath Test . 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
28、 2-1 Factors for Converting Measured dc Resistance of Conductors to 5C. 5 Table 2-2 Temperature Correction 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
29、Jacket Irregularity Inspection. 29 Table 4-3 Mandrel Size for Heat Shock Test . 33 FIGURES Figure 2-1 Sample 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 Measur
30、e Protrusions and Indentations 23 Figure 3-2 Procedure to Measure Convolutions . 23 Figure 4-1 Test Specimen 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 Ext
31、ruded Dielectric Power, Control, Instrumentation and Portable Cables, was developed by the Insulated Cable 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 elimin
32、ate misunderstandings between the manufacturers and the user and to assist the user in selecting and obtaining 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
33、procedures covered by this document. Requests for interpretation of this standard must be submitted in writing 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 us
34、e of this publication will be welcomed by the Association. ANSI/NEMA WC 53/ICEA T-27-581-2016 Page 1 2016 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 cabl
35、es. 1.2 References Included in this standard are many, but not all, of the test methods to which reference 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 f
36、ollows: 1.2.1 Normative References American Society for Testing and Materials (ASTM) 100 Barr Harbor Drive 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 A
37、STM D412-15a Standard Test Methods for Vulcanized Rubber and Thermoplastic Elastomers Tension ASTM D471-12 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
38、 for Dust-and-Fog Tracking and Erosion Resistance of Electrical Insulating Materials ASTM D2275-01 Standard 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 Co
39、ntent and Swell Ratio of Crosslinked Ethylene Plastics ASTM D3349-12 Standard Test Method for Absorption 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
40、Creep of Polymeric Insulations ICEA T-29-520 Procedure for Conducting Vertical Cable Tray Flame Tests with 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 Disc
41、harge Test Procedure ICEA T-25-425 Guide for Establishing Stability of Volume Resistivity of Conducting 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 Extru
42、ded Dielectric Power, Control, Instrumentation, and Portable Cables for Test ICEA T-28-562 Test Method for 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 Es
43、tablishing Volume Resistivity Compatibility of Water Blocking Components With Extruded Semiconducting Shield 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. Departmen
44、t of Commerce Springfield, VA 22161 National Bureau of Standards Handbook No. 100 Copper Wire Tables (February 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
45、 few specialized test methods are described in ICEA Standard Publication S-94-649, Standard for Concentric 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
46、 referenced in this document, its title and date of issue may be found in Section 1. The reference is only 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.
47、customary units throughout this standard. Approximate International System of Units (SI) equivalents are 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
48、, which shall be recorded. The Fahrenheit equivalents for Celsius degrees may be calculated by the equation 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 th
49、e 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 for 211.6 kcmil (4/0 AWG) and smaller. For kcmil values of AWG sizes see the following table 1-1: Table 1-1 kcmil Equivalent of AWG Conductor Sizes AWG kcmil AWG kcmil AWG kcmil 22 0.640 13 5.18 4 4
