1、NEMA Standards PublicationNational Electrical Manufacturers AssociationANSI/NEMA WC 58-2008Portable and Power Feeder Cables for Use in Mines and Similar ApplicationsApproved as an American National Standard ANSI Approval Date: May 1, 2008 NEMA Standard Publication No. WC 58-2008 ICEA Standard Public
2、ation No. S-75-381-2008 Portable and Power Feeder Cables for Use in Mines and Similar Applications Published by: National Electrical Manufacturers Association 1300 North 17thStreet, Suite 1752 Rosslyn, Virginia 22209 www.nema.org Copyright 2008 by the National Electrical Manufacturers Association an
3、d the Insulated Cable Engineers 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. NOTICE AND DISC
4、LAIMER 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 necessarily mean that there is unanimous agreement among every person participating in the
5、development of this document. The National Electrical Manufacturers Association (NEMA) standards and guidelines publications, of which the document contained herein is one, are developed through a voluntary consensus standards development process. This process brings together volunteers and/or seeks
6、 out the views of person who have an interest in the topic covered by this publication. While NEMA administers the process and establishes rules to promote fairness in the development of consensus, it does not write the document and it does not independently test, evaluate, or verify the accuracy or
7、 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 whatsoever, whether special, indirect, consequential, or compensatory, directly or indi
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9、document will fulfill any of your particular purposes or needs. NEMA does not undertake to guarantee the performance of any individual manufacturer or sellers products or services by virtue of this standard or guide. In publishing and making this document available, NEMA is not undertaking to render
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11、ional 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 other sources, which the user may wish to consult for additional views or information not covered by this publication. NEMA
12、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 statement of compliance with any health or safety-related info
13、rmation in this document shall not be attributable to NEMA and is solely the responsibility of the certifier or maker of the statement. ANSI/NEMA WC 58-2008 ICEA S-75-381-2008 Page i Copyright 2008 by the National Electrical Manufacturers Association and the Insulated Cable Engineers Association CON
14、TENTS Page Foreword . vi Section 1 GENERAL . 1 1.1 Scope . 1 Portable Cables 2,000 Volts or Less . 1 Portable Cables 2,0015,000 Volts (100% Insulation Level) 1 Portable Cables 025,000 Volts (100% Insulation Level) . 1 Mine Power 2,00125,000 Volts (100% and 133% Insulation Level) . 1 1.2 General Info
15、rmation . 2 1.3 Information to be Supplied by User . 2 Section 2 CONDUCTORS . 3 2.1 Physical and Electrical Properties . 3 2.1.1 Copper Conductors . 3 2.1.2 Aluminum Conductors . 3 2.1.3 Flexible Conductors 3 2.2 Conductor Size Units . 3 2.3 Conductor DC Resistance per Unit Length . 4 2.3.1 Direct M
16、easurement of DC Resistance per Unit Length . 4 2.3.2 Calculation of DC Resistance per Unit Length . 4 2.4 Conductor Diameter 4 Section 3 PORTABLE SINGLE AND MULTIPLE CONDUCTOR POWER CABLE . 12 3.1 Scope . 12 3.2 DC Systems . 12 3.3 Single-Conductor Cables, Nonshielded, 2,000 Volts or Less . 12 3.4
17、Type W And G Two-Conductor Cables, 2,000 Volts or Less 12 3.4.1 Two-Conductor Flat Twin Cables 12 3.4.2 Two-Conductor Round Cables 13 3.5 Type W, G, G-GC and G-CGC. Three- and Four-Conductor Cables, 2,000 Volts or Less 13 3.5.1 Three- and Four-Conductor, Round Type W Cables without Grounding Conduct
18、ors 13 3.5.2 Three- and Four-Conductor Round Type G Cables with Grounding Conductors 13 3.5.3 Three-Conductor Flat Type G Cable with Grounding Conductors 13 3.5.4 Three-Conductor Flat G-GC Cable with Grounding Conductor and Ground-Check Conductor 14 3.5.5 Three-Conductor Round Type G-GC and Type G-C
19、GC Cable 14 3.5.6 Four-Conductor Flat Type W Cable Without Grounding Conductors . 14 3.6 Type W AND G, Five- and Six-Conductor, 2,000 Volts or Less 14 3.6.1 Five- And Six-Conductor Round Type W Cables without Grounding Conductor . 14 3.6.2 Five-Conductor Round Type G Cables with Grounding Conductor
20、15 3.7 Type PG, Two- and Three-Conductors with Grounding Conductor, 2,000 Volts or Less . 15 3.8 Type PCG, Two- and Three-Conductors with Grounding Conductor and Two Control Conductors, 2,000 Volts or Less . 15 3.9 Type G, Three-Conductor Round with Grounding Conductors 2,001-5,000 Volts . 15 3.10 S
21、hielded Cable 25,000 Volts or Less 15 3.10.1 Shielded Cables 2,000 Volts or Less 15 3.10.2 Shielded Cables 2,001 to 5,000 Volts . 17 3.10.3 Shielded Cables 5,001 to 25,000 Volts . 19 3.11 Power Conductors . 20 3.12 Control and Ground-Check Conductors 20 3.12.1 Control Conductors for Type PCG and SHD
22、-PCG Cables . 20 3.12.2 Ground-Check Conductors . 20 3.12.3 Ground-Check Conductor for Flat G-GC 20 ANSI/NEMA WC 58-2008 ICEA S-75-381-2008 Page ii Copyright 2008 by the National Electrical Manufacturers Association and the Insulated Cable Engineers Association 3.13 Grounding Conductors 20 3.13.1 Si
23、ze and Number 20 3.13.2 Flat Twin Type G . 21 3.13.3 Flat Three-Conductor Type G . 21 3.13.4 Round Type G, G-GC and G-CGC . 21 3.13.5 Flat Three-Conductor Type G-GC 21 3.13.6 Round Five-Conductor Type G, Type PG, and PCG 21 3.14 Stress Control Layer (Conductor Shield) 22 3.14.1 Extruded Stress Contr
24、ol Layer (Conductor Shield) . 22 3.15 Power Conductor Insulation 22 3.15.1 Insulation Physical and Electrical Requirements 22 3.15.2 Insulation Thickness 22 3.16 Ground Check and Control Conductor Insulation . 23 3.17 Tapes and Braids 23 3.17.1 Power Conductors . 23 3.17.2 Ground Check and Control C
25、onductors 24 3.18 Conductor Identification . 27 3.18.1 Power Conductors . 27 3.18.2 Control and Ground-check Conductors 27 3.19 Shielding 27 3.19.1 Metallic Braid Shields 28 3.19.2 Metal Wire Shields 28 3.20 Conductor Assembly . 28 3.21 Jackets. 29 3.21.1 Duty Rating 29 3.21.2 General 29 3.21.3 Thic
26、kness of Jacket . 29 3.22 Completed Cable . 29 3.22.1 Outside Diameters 29 3.22.2 Diameter Tolerances . 29 3.22.3 Marking 30 3.22.4 Tests 30 SECTION 4 CONSTRUCTIONS OF MINE POWER FEEDER CABLE . 49 4.1 Scope . 49 4.2 General Requirements 49 4.3 Conductors 49 4.3.1 Power Conductors . 49 4.3.2 Conducto
27、r Stress Control Layer 50 4.3.3 Grounding Conductors 50 4.3.4 Ground-check Conductor 50 4.4 Insulation . 50 4.4.1 Power Conductor 50 4.4.2 Ground-check Conductor 50 4.5 Insulation Shielding . 50 4.5.1 Nonmetallic Covering 50 4.5.2 Metal Component 51 4.6 Identification 52 4.7 Conductor Assembly . 52
28、4.8 Jacket 52 4.9 Outside Diameter . 52 4.10 Tests 52 ANSI/NEMA WC 58-2008 ICEA S-75-381-2008 Page iii Copyright 2008 by the National Electrical Manufacturers Association and the Insulated Cable Engineers Association Section 5 SPECIAL CONSTRUCTIONS 58 5.1 Portable Arc-Welding Cables 58 5.1.1 Scope 5
29、8 5.1.2 Conductor 58 5.1.3 Separator . 58 5.1.4 Jackets 58 5.1.5 Number of Wires, Outside Diameters, and Diameter Tolerances 58 5.1.6 Flame Test Requirements . 58 Section 6 TESTING AND TEST METHODS . 63 6.1 Testing . 63 6.2 Tests on Samples 63 6.3 Conductor Test Methods . 63 6.3.1 Method for DC Resi
30、stance Determination 63 6.3.2 Methods for Cross-sectional Area Determination . 63 6.3.3 Methods for Diameter Determination 64 6.4 Test Samples and Specimens fFor Physical and Aging Tests . 64 6.4.1 General 64 6.4.2 Number of Thickness Measurements . 64 6.4.3 Measurement of Thickness . 64 6.4.4 Sampl
31、ing of Insulation for Physical and Aging Tests 64 6.4.5 Sampling of Jacket for Physical and Aging Tests . 64 6.4.6 Number of Test Specimens. 64 6.4.7 Size of Specimens 65 6.4.8 Preparation of Specimens of Insulation and Jacket 65 6.4.9 Specimens with Thin Jackets Crosslinked to Insulation . 65 6.4.1
32、0 Specimen for the Tear Test . 65 6.4.11 Specimen for Accelerated Aging Test . 66 6.4.12 Calculation of Area of Test Specimens . 66 6.4.13 Physical Test Procedures . 66 6.4.14 Aging Test . 66 6.4.15 Physical Tests for Semi Conducting Material Intended for Extrusion . 67 6.4.16 Retests for Physical a
33、nd Aging Properties and Thickness . 67 6.5 Capacity and Power Factor Tests . 68 6.6 Accelerated Water Absorption . 68 6.6.1 General 68 6.6.2 Electrical Method (EM-60) . 68 6.7 Surface Resistance . 68 6.8 Thickness of Tapes . 68 6.9 Heat (Deformation) Distortion 68 6.10 Heat Shock 69 6.11 Cold Bend 6
34、9 6.12 Hot Creep Test 69 6.13 Solvent Extraction 69 6.14 Volume Resistivity . 69 6.14.1 Test Samples 69 6.15 Stripping Test 69 6.16 Retests for Tests Covered by 6.6 through 6.15 and 6.17.4 70 6.17 Electrical Tests on Completed Cables 70 6.17.1 Voltage Tests 70 6.17.2 Insulation Resistance 71 6.17.3
35、Partial-Discharge Test Procedure . 71 6.18 Method Determining Permittivity (S.I.C.) and Dielectric Strength of Extruded Nonconducting Polymeric Stress Control Layers 71 ANSI/NEMA WC 58-2008 ICEA S-75-381-2008 Page iv Copyright 2008 by the National Electrical Manufacturers Association and the Insulat
36、ed Cable Engineers Association Annexes A (Informative) Symbols and Abbreviations 72 B (Normative) Definitions for Maximum Temperature of Conductors in Insulated Wire and Cable 73 C (Normative) Emergency Overload Ratings for Insulated Cables 74 D (Normative) ICEA Publications, ASTM, NEMA Standards an
37、d NFPA 75 E (Informative) Shielding 78 F (Informative) Minimum Bending Radius for Cables . 80 J Informative) Voltage Test after Installation 85 K (Informative) Additional Conductor Information . 86 Tables 2-1 Weight Increment Factors, K . 5 2-2 Schedule for Establishing Maximum DC Resistance 6 2-3 N
38、ominal DC Resistance in Ohms per 1,000 Feet at 25 C of Concentric Lay Stranded Conductors 7 2-4 Nominal DC Resistance in Ohms per 1,000 Feet at 25 C for Flexible Annealed Copper Conductors 8 2-5 Nominal Diameters for Copper and Aluminum Conductors 10 2-6 Factors for Determining Nominal Resistance of
39、 Stranded Conductors per 1,000 Feet at 25 C 11 3-1 Power Conductor Insulation Requirements . 25 3-2 Ground-Check and Control Conductor Insulation Requirements . 26 3-3 Extra-Heavy-Duty Crosslinked Jackets and Thermoplastic Polyurethane 32 3-4 Heavy-Duty Crosslinked Jackets . 33 3-5 Maximum Length of
40、 Lay 33 3-6 2,000 Volts or Less Single-Conductor Portable Power Cable 34 3-7 2,000 Volts or Less Type W and G Two-Conductor Flat Twin Portable Power Cables 35 3-8 2,000 Volts or Less Type W and G Two-Conductor Round Portable Power Cables 35 3-9 2,000 Volts or Less Type W and G Three-Conductor Round
41、Portable Power Cables . 36 3-10 2,000 Volts or Less Type W and G Four-Conductor Round Portable Power Cables . 36 3-11 2,000 Volts or Less Type G Three-Conductor Flat Portable Power Cables with Two Grounding Conductors 37 3-12 2,000 Volts or Less Type G-GC Three-Conductor Round Portable Power Cables
42、with Two Grounding Conductors and One Ground-Check Conductor . 37 3-13 2,000 Volts or Less Type G-GC Three Conductor Round Portable Power Cables with Three Grounding Conductors and One Ground-Check Conductor 38 3-14 2,000 Volts or Less Type G-GC Three-Conductor Flat Portable Power Cables with One Gr
43、ounding Conductor and One Ground-Check Conductor . 38 3-15 2,000 Volts or Less Type W Four-Conductor Flat Portable Power Cables . 39 3-16 2,000 Volts or Less Type W And G, Five- and Six-Conductor Round Portable Power Cables39 3-17 2,000 Volts or Less Type PG Two- and Three-Conductor Round Portable P
44、ower Cables 39 3-18 2,000 Volts or Less Type PCG Two- and Three-Conductor Round Portable Power Cables . 40 ANSI/NEMA WC 58-2008 ICEA S-75-381-2008 Page v Copyright 2008 by the National Electrical Manufacturers Association and the Insulated Cable Engineers Association 3-19 2,001 To 5,000 Volts Type G
45、 Three-Conductor Round Portable Power Cables 40 3-20 Type SH Single-Conductor Portable Power Cables for 100 Percent Insulation Level Only . 41 3-21 2,000 Volts or Less Type SHC-GC Three-Conductor Round Portable Power Cables for 100 Percent Insulation Level Only 42 3-22 Type SHD And SHD-GC Three-Cond
46、uctor Round Portable Power Cables for 100 Percent Insulation Level Only . 43 3-23 Type SHD-CGC Three-Conductor Portable Power Cables with Three Grounding Conductors and One Ground-Check Conductor . 45 3-24 Jacket Thicknesses for Types fnd Sizes of Round Portable Cables not Covered by Tables 3-6 thro
47、ugh 3-23 and 3-26 46 3-25 Conductors 47 3-26 Type SHD-PCG Cable . 48 3-27 2,000 Volts or Less Type SHD-Flat Three Conductor Portable Power Cable with Two Grounding Conductors 48 Tables 4-1 Conductor Sizes 53 4-2 Insulation Thicknesses and Outside Diameters2,001 to 5,000 Volts 100 and 133 Percent Ins
48、ulation Levels 53 4-3 Insulation Thicknesses and Outside Diameters 5,001 to 8,000 Volts . 54 4-4 Insulation Thicknesses and Outside Diameters 8,001 to 15,000 Volts . 54 4-5 Insulation Thicknesses and Outside Diameters 15,001 to 25,000 Volts . 55 4-6 Partial Discharge Extinction Voltage . 55 4-7 Over
49、all Jacket Thickness 55 4-8 Nominal DC Resistance of Medium Hard-Drawn Coated and Uncoated Copper Conductors Concentric Stranded, Class B and C. 56 4-9 Thermoplastic Jacket Requirements . 57 5-1 Heavy-Duty Jackets (Type A) 60 5-2 Medium-Duty Jackets (Type B) . 61 5-3 Construction Details 62 6-1 Number of Samples . 63 6-2 Number of Test Specimens . 65 H-1 Ampacities for Portable Power Cables, Amperes per Power Conductor 83 I-1 Ampacities for Three-Conductor Mine Power Cables . 84 J-1 DC Test Voltages after Installation, kV 85 K-1 Concentric Stranded
