American National Standard. Magnet Wire. ANSI/NEMA MW Revision of ANSI MW Secretariat:

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ANSI/NEMA MW Revision of ANSI MW American National Standard Magnet Wire Secretariat: National Electrical Manufacturers Association Approved April 8, 2013 Published May 28, 2013 American
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ANSI/NEMA MW Revision of ANSI MW American National Standard Magnet Wire Secretariat: National Electrical Manufacturers Association Approved April 8, 2013 Published May 28, 2013 American National Standards Institute Part 0, Page 2 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 necessarily mean that there is unanimous agreement among every person participating in the development of this document. American National Standards Institute (ANSI) 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 out the views of person who have interest in the topic covered by this publication. While NEMA administers the process 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 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 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, and disclaims and makes no warranty that the information in this document will fulfill any of your particular purposes or needs. NEMA does not undertake to guarantee the performance of any individual manufacturer or seller s products or services by virtue of this standard or guide. In publishing and making 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 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 other sources, which the user may wish to consult for additional 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 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. Part 0, Page 3 Summary of Revisions MW Amendments following the publication of MW , Revision Amendments from Revision are indicated by an orange vertical line in left margin of revised page. Note: Where text has been revised in more than one version, only the most recent is color-coded. Introductory Material Updated tables of contents... i xii Updated Foreword... xiii Part 1 Table revised to accurately reflect relation between percentage of overlap and no. of tape layers; Formula for minimum thickness or diameter increase to take into account tape stretching factor Revised to clarify the method for determining bare wire diameter based on AWG and to update the wire size range in which special maximum bare wire dimensions apply in table Revised to clarify the methodology applied for determining millimeter dimensions Table 1: Revised max bare dimensions for 2 and 3 AWG... 39, 42 Table 1: Added reference to for special considerations for AWG magnet wire... 41, 44 Table 1: Revised mm dimensions to reflect clarified methodology for calculating these Table 1: Editorially revised to include MW 16-C Quad minimum increases and maximum OD s Tables 13 through 18: Revised titles indicating standard dimensions and added reference to Appendix E for dimensions other than those provided in the table Table 25: Revised to take account an 85% stretch factor inherent in wire manufacturing processes Table 27: Revised to take account an 85% stretch factor inherent in wire manufacturing processes Part 2 MW 15-A, 15-C, 18-A, 18-C, 20-C, 35-A, 35-C, 36-A, 36-C, 37-C, 38-C, 41-C, 42-C, 43-C, 44-C, 45-C, 46-C, 47-C, 48-C, 50-C, 51-C, 52-C, 53-C, 60-A, 60-C, 61-A, 61-C, 64-C, 65-C, 74-A, 74-C, 81-C: revised to reference new shot electrode procedure for dielectric breakdown... Per MW No. New MW 31-A specification MW 31-C: revised dimensional, adherence and flexibility, and dielectric breakdown requirements New MW 33-A specification MW 31-C, 33-C 60-A, 60-C, 61-A, 61-C, 64-C and 65-C: removal of reference to table Per MW No. MW 62-C, 63-C: obsolete specifications MW 64-C: editorial addition of square wire dimensions New MW 84-C specification New MW 132-C specification New MW 137-C specification Part 0, Page 4 Part Revised procedure for determining dimensions by the hand or bench micrometer method Table 28 revised to specify spindle forces and anvil diameters for fibrous and tape covered wires revised to specify the same shot as that for shot box electrode testing for dielectric breakdown Table 30 revised to add new MW 84-C to the appropriate column header Table 35 revised editorially to include requirements for MW 16-C quad New shot box electrode method for determining dielectric breakdown New table 40 dielectric breakdown requirements using shot box electrode method Appendix A Revised and reorganized to reference IEC standards and to delete cancelled Federal specifications... A-1 Appendix B Revised to clarify that overall length requirements in tables B-2, B-4 and B-6 are nominal... B-1 Appendix C Revised to remain current with NEMA and IEC standards activities through 2012 to delete cancelled Federal specification designators... C-1 Appendix D Revised to update the lists of references to Part 2 specifications to which dielectric breakdown voltage formulas apply; to add references to Part 2 specifications for self-bonding wire; to indicate that the formulas in Appendix D do not apply to MW 16-C quad... D-1 Appendix E Revised to consolidate tables E-4 through E-9 and to reflect IEC approach to dimensions... E-1 Appendix G Revised recommended minimum and maximum winding tensions for round aluminum magnet wire... G-1 Part 0, Page 11 TABLE OF CONTENTS Foreword How to Use this Publication Part 1 GENERAL 1.1 SCOPE NORMATIVE REFERENCES AND AUTHORIZED ENGINEERING INFORMATION (AEI) DEFINITIONS MATERIALS Conductors Round, Square, and Rectangular, Copper and Aluminum Insulating Materials MANUFACTURING Application of Insulation Intermediate Sizes Joints Packaging TEST CONDITIONS AND PARAMETERS Safety Statement Selection of Specimens Ambient Conditions of Test Power Frequency Mandrels Rectangular and Square Wire Round Wire Periodic Conformance Retests UNITS OF MEASURE THERMAL CLASS OF MAGNET WIRE ORDERING INFORMATION Product Identification Number Minimum Ordering Data DE-REELING (WINDING) TENSION Page Tables 1 Dimensions for Bare and Film Insulated Round Magnet Wire Round Copper Wire, Ultra-Fine Sizes by Resistance Dimensions for Round Film Insulated Self-Bonding Magnet Wire Dimensions for Single Glass Fiber Covered Round Bare, Single Film Coated and Heavy Film Coated Wire Dimensions for Double Glass Fiber Covered Round Bare, Single Film Coated and Heavy Film Coated Wire... 50 Part 0, Page 12 6 Dimensions for Single Polyester Glass Fiber Covered Round Bare, Single Film Coated and Heavy Film Coated Wire Dimensions for Double Polyester Glass Fiber Covered Round Bare, Single Film Coated and Heavy Film Coated Wire Dimensions, Radii and Cross-Sectional Area for Standard Rectangular Bare Wire Bare Rectangular Conductor Tolerances [Deleted] Film Insulated Rectangular Magnet Wire Increase in Thickness and Width Due to Film Coating Dimensions of Square Bare Wire Heavy and Quadruple Film Insulated Square Magnet Wire Increase in Dimensions Due to Film Coating Range of Increase in Dimensions, Inches Single Glass Fiber Covered Heavy Film Insulated Rectangular Copper Wire Range of Increase in Dimensions, Inches Double Glass Fiber Covered Bare Rectangular Copper Wire Range of Increase in Dimensions, Inches Double Glass Fiber Covered Heavy Film Coated Rectangular Copper Wire Range of Increase in Dimensions, Inches Single Polyester Glass Fiber Covered Heavy Film Insulated Rectangular Copper Wire Range of Increase in Dimensions, Inches Double Polyester Glass Fiber Covered Bare Rectangular Copper Wire Range of Increase in Dimensions, Inches Double Polyester Glass Fiber Covered Heavy Film Coated Rectangular Copper Wire Single Glass Fiber Covered, Heavy Film Insulated Square Copper Magnet Wire Minimum Increase and Maximum Overall Dimensions Due to Insulation Single Polyester Glass Fiber Covered Heavy Film Insulated Square Copper Magnet Wire Minimum Increase and Maximum Overall Dimensions Due to Insulation Double Glass Fiber Covered, Bare or Heavy Film Insulated Square Copper Magnet Wire Minimum Increase and Maximum Overall Dimensions Due to Insulation Double Polyester Glass Fiber Covered, Bare or Heavy Film Insulated Square Copper Magnet Wire Minimum Increase and Maximum Overall Dimensions Due to Insulation Comparison Between AWG and IEC R-40 Series Bare Wire Diameters Comparison Between NEMA and IEC Increases and Overall Diameters Dimensions for Tape Covered Round Magnet Wire Increase in Dimensions of Rectangular Wire Due to Tape Covering Dimensions for Tape Covered Square Magnet Wire Part 0, Page 13 Specification Number MW 2-C MW 3-C Part 2 PROPERTIES AND REQUIREMENTS Polyurethane for Solderable Applications (single and heavy) OBSOLETE EFFECTIVE DEC. 31, 2012 Polyurethane with Self-bonding Overcoat for Solderable Applications (Types 1 and 2) OBSOLETE EFFECTIVE DEC. 31, 2012 Thermal Class Round Rectangular and Square Page No. 105 X X 85 MW 5-C Polyester (Single and Heavy) 155 X 86 MW 6-C Polyamide (Single and Heavy) OBSOLETE EFFECTIVE DEC. 31, X 87 MW 15-A Polyvinyl Acetal (Single and Heavy) 105 X 88 MW 15-C MW 16-C MW 17-C Polyvinyl Acetal (Single, Heavy, Triple and Quad) Polyimide (Single Heavy, Triple, and Quadruple) Polyvinyl Acetal Overcoated with Polyamide (Single and Heavy) OBSOLETE EFFECTIVE DEC. 31, X X X 91 MW 18-A Polyvinyl Acetal (Heavy and Quadruple) 105 X 92 MW 18-C Polyvinyl Acetal (Heavy and Quadruple) 105 X 93 MW 19-C Polyvinyl Acetal with Self-bonding Overcoat (Types 1, 2 and 3) 105 X 94 MW 20-C Polyimide (Heavy and Quadruple) 240 X 95 MW 24-A MW 24-C MW 26-C MW 27-C MW 28-A MW 28-C MW 29-C MW 30-C Polyamide (Single and Heavy) Polyamide (Single, Heavy and Triple) Polyester (imide) for Solderable Applications (Single and Heavy) Polyester (imide) Overcoated with Polyamide for Solderable Applications (Single and Heavy) Polyurethane Overcoated with Polyamide for Solderable Applications (Single and Heavy) Polyurethane Overcoated with Polyamide for Solderable Applications (Single and Heavy) Polyurethane Overcoated with Polyamide and Self-Bonding Overcoated for Solderable Applications (Types 1 and 2) Polyester (amide) (imide) (Single, Heavy, and Triple) MW 31-A Paper Covered 90 or 105 MW 31-C Paper Covered 90 or X X X X X X X X 103 X 104 X 105 Part 0, Page 14 Specification Number Part 2 PROPERTIES AND REQUIREMENTS Thermal Class MW 33-A Paper Covered Bare Rectangular and Square 90 or 105 MW 33-C Paper Covered Bare Rectangular and Square 90 or 105 MW 35-A MW 35-C MW 36-A MW 36-C MW 37-C MW 38-C Polyamideimide (Single and Heavy) Polyamideimide (Single, Heavy Triple, and Quad) Polyamideimide (Heavy and Quadruple) Polyamideimide (Heavy and Quadruple) Polyamideimide (Single, Heavy and Triple) Polyamideimide (Heavy and Quadruple) Round Rectangular and Square Page No. X 106 X X X X X X X 113 MW 41-C Glass Fiber Covered (Single and Double) 155 X 114 MW 42-C Glass Fiber Covered (Single and Double) 155 X 115 MW 43-C MW 44-C MW 45-C MW 46-C MW 47-C MW 48-C MW 50-C MW 51-C MW 52-C MW 53-C Glass Fiber Covered Silicone Treated (Single and Double) Glass Fiber Covered Silicone Treated (Single and Double) Polyester Glass Fiber Covered (Single and Double) Polyester Glass Fiber Covered (Single and Double) Polyester Glass Fiber Covered Silicone Treated (Single and Double) Polyester Glass Fiber Covered Silicone Treated (Single and Double) Glass Fiber Covered, High Temperature Organic Varnish Treated (Single and Double) Polyester Glass Fiber Covered, High Temperature Organic Varnish Treated (Single and Double) Glass Fiber Covered, High Temperature Organic Varnish Treated (Single or Double) Polyester Glass Fiber Covered, High Temperature Organic Varnish Treated (Single and Double) 200 X X X X X X X X X X 126 MW 60-A Aromatic Polyamide Paper Covered (Paper) 220 X 127 MW 60-C Aromatic Polyamide Paper Covered (Paper) 220 X 128 Part 0, Page 15 Specification Number Part 2 PROPERTIES AND REQUIREMENTS Thermal Class Round Rectangular and Square MW 61-A Aromatic Polyamide Paper Covered (Paper) 220 X 129 MW 61-C Aromatic Polyamide Paper Covered (Paper) 220 X 130 MW 62-C MW 63-C Aromatic Polyimide Tape Covered OBSOLETE EFFECTIVE DEC. 31, 2013 Aromatic Polyimide Tape Covered OBSOLETE EFFECTIVE DEC. 31, 2013 Page No. 220 X X 132 MW 64-C Aromatic Polyimide Tape Covered 240 X 133 MW 65-C Aromatic Polyimide Tape Covered 240 X 134 MW 72-C MW 73-A MW 73-C Polyester (amide) (imide) for Hermetic Applications (Heavy) Polyamideimide for Hermetic Applications (Heavy) Polyester (amide)(imide) Overcoated with Polyamideimide for Hermetic Applications (Heavy, Triple, and Quad) 180 X X X 137 MW 74-A Polyester (amide) (imide) (Single and Heavy) 220 X 138 MW 74-C Polyester (amide) (imide) (Single and Heavy) 200 X 139 MW 75-C MW 76-A MW 76-C MW 77-C MW 78-C MW 79-C MW 80-A MW 80-C Polyurethane for Solderable Applications (Single and Heavy) Polyamide (Single and Heavy) Polyamide (Single, Heavy, and Triple) Polyester (imide) for Solderable Applications (Single and Heavy) Polyester (imide) Overcoated with Polyamide for Solderable Applications (Single and Heavy) Polyurethane for Solderable Applications (Single, Heavy and Triple) Polyurethane Overcoated With Polyamide For Solderable Applications (Single and Heavy) Polyurethane Overcoated with Polyamide for Solderable Applications (Single, Heavy, Triple) 130 X X X X X X X X 147 MW 81-C Polyamideimide (Single and Heavy) 220 X 148 MW 82-C MW 83-C Polyurethane for Solderable Applications (Single, Heavy and Triple) Polyurethane Overcoated with Polyamide for Solderable Applications (Single, Heavy, Triple) 180 X X 150 MW 84-C Polyamideimide Rectangular 220 X 151 MW 102-A Polyester (amide) (imide) Overcoated With Polyamideimide and Self-bonding Overcoat (Type 1 and Type 2) 180 X 152 Part 0, Page 16 Specification Number MW 102-C MW 130-C MW 131-C MW 132-C MW 135-C MW 136-C MW 137-C Part 2 PROPERTIES AND REQUIREMENTS Polyester (amide)(imide) Overcoated with Polyamideimide and Self-bonding Overcoat (Type 1 and Type 2) Polyurethane with self-bonding overcoat (Type 1 and Type 2) Polyurethane with Self-Bonding Overcoat (Type 1 and Type 2) Solderable Polyurethane with Self-Bonding Overcoat Polyurethane Overcoated with Polyamide and Self-Bonding Overcoat (Type 1 and Type 2) Polyurethane Overcoated with Polyamide and Self-Bonding Overcoat (Type 1 and Type 2) Solderable Polyurethane Overcoated with Polyamide and Self-Bonding Overcoat Thermal Class Round Rectangular and Square Page No. 180 X X X X X X X 159 Part 0, Page 17 Part 2 PROPERTIES AND REQUIREMENTS LISTING BY THERMAL CLASS, INSULATION, COATING, AND FORM Thermal Class Insulation, Covering and Form See Part 2, Section FILM INSULATED ROUND MAGNET WIRE Aluminum Copper Page No. 105 Polyamide - MW 6-C Polyvinyl Acetal MW 15-A MW 15-C 88, Polyvinyl Acetal Overcoated with Polyamide - MW 17-C Solderable Polyurethane - MW 2-C Solderable Polyurethane and Self-bonding Overcoat - MW 3-C Solderable Polyurethane Overcoated with Polyamide and Selfbonding - MW 29-C 102 Overcoat 105 Polyvinyl Acetal and Self-bonding Overcoat - MW 19-C Solderable Polyurethane Overcoated with Polyamide MW 28-A MW 28-C 100, Solderable Polyurethane - MW 75-C Solderable Polyurethane with Self-bonding Overcoat - MW 130-C Solderable Polyurethane Overcoated with Polyamide and Self- - MW 135-C 157 Bonding Overcoat 155 Polyester - MW 5-C Polyamide MW 24-A MW 24-C 96, Solderable Polyester (imide) - MW 26-C Solderable Polyester (imide) Overcoated with Polyamide - MW 27-C Solderable Polyurethane - MW 79-C Solderable Polyurethane Overcoated with Polyamide MW 80-A MW 80-C 145, Solderable Polyurethane with Self-bonding Overcoat - MW 131-C Solderable Polyurethane Overcoated with Polyamide and Selfbonding - MW 136-C 158 Overcoat 180 Polyester (amide) (imide) - MW 30-C Polyamide MW 76-A MW 76-C 140, MW 102-A MW 102-C 151, 152 Polyamideimide and Self-Bonding Overcoat 180 Solderable Polyester (imide) - MW 77-C Solderable Polyester (imide) Overcoated with Polyamide - MW 78-C Hermetic Polyester (amide) (imide) - MW 72-C Solderable Polyurethane - MW 82-C Solderable Polyurethane Overcoated with Polyamide - MW 83-C Solderable Solderable Polyurethane with Self-bonding Overcoat - MW 132-C Solderable Solderable Polyurethane Overcoated with Polyamide and Self-bonding Overcoat - MW 137-C 159 Part 0, Page 18 Part 2 PROPERTIES AND REQUIREMENTS LISTING BY THERMAL CLASS, INSULATION, COATING, AND FORM Thermal Class Insulation, Covering and Form See Part 2, Section Aluminum Copper Page No MW 35-C 109 Polyamideimide 200 Polyester (amide) (imide) - MW 74-C Hermetic - MW 73-C 136 Polyamideimide 220 MW 35-A Polyamideimide MW 37-C 112 Polyamideimide 220 Polyester (amide) (imide) MW 74-A Hermetic MW 73-A Polyamideimide 220 Polyamideimide MW 81-C Hermetic Polyimide - MW 16-C 90 FILM INSULATED RECTANGULAR AND SQUARE WIRE 105 Polyvinyl Acetal MW 18-A MW 18-C 92, MW 36-C 111 Polyamideimide 220 MW 36-A Polyamideimide MW 38-C 113 Polyamideimide 220 Polyamideimide MW 84-C Polyimide - MW 20-C 95 FIBROUS COVERED ROUND MAGNET WIRE 90 or 105 Paper Covered MW 31-A MW 31-C 104, Glass Fiber Covered - MW 41-C Polyester Glass Fiber Covered - MW 45-C Glass Fiber Covered, High Temperature Organic - MW 50-C 122 Varnish Treated 180 Polyester Glass Fiber Covered, High Temperature - MW 51-C 123 Organic Varnish Treated 200 Glass Fiber Covered, Silicone Treated - MW 44-C Polyester Glass Fiber Covered, Silicone Treated - MW 47-C Aromatic Polyamide Paper Covered MW 61-A MW 61-C 128, Aromatic Polyimide Tape Covered - MW 63-C 131 OBSOLETE EFFECTIVE DEC. 31, Aromatic Polyimide Tape Covered - MW 65-C 133 Part 0, Page 19 Part 2 PROPERTIES AND REQUIREMENTS LISTING BY THERMAL CLASS, INSULATION, COATING, AND FORM Thermal Class Insulation, Covering and Form See Part 2, Section FIBROUS COVERED RECTANGULAR & SQUARE MAGNET WIRE Aluminum Copper Page No. 90 or 105 Paper Covered MW 33-A MW 33-C 106, Glass Fiber Covered - MW 42-C Polyester Glass Fiber Covered - MW 46-C Glass Fiber Covered, High Temperature Organic - MW 52-C 124 Varnish Treated 180 Polyester Glass Fiber Covered, High Temperature - MW 53-C 125 Organic Varnish Treated 200 Glass Fiber Covered, Silicone Treated - MW 43-C Polyester Glass Fiber Covered, Silicone Treated - MW 48-C Aromatic Polyamide Paper Covered MW 60-A MW 60-C 126, Aromatic Polyimide Tape Covered - MW 62-C 130 OBSOLETE EFFECTIVE DEC. 31, Aromatic Polyimide Tape Covered - MW 64-C 132 Part 0, Page 20 Part 3 TEST PROCEDURES 3.1 SAFETY STATEMENT ROUTINE TESTS 3.2 DIMENSIONS Round Wire Rectangular and Square Wire ADHERENCE AND FLEXIBILITY Elongation and Mandrel Wrap Method Mandrel Wrap Method Elongation Method Circumferential Cut and Elongation
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