12/2009 Rev.1. magnet wire / winding wire engineering data handbook

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1 12/2009 Rev.1 magnet wire / winding wire engineering data handbook

2 All statements, technical information and recommendations made herein by Essex Group, Inc. ( Seller ) are based on tests it believes to be reliable, but the accuracy or completeness thereof is not guaranteed, and such information is provided AS IS without any warranties of any kind. Buyer shall determine the suitability of the Products for his intended use, and assumes all risks and responsibility for loss or damage resulting from the handling or use of the Products. Seller warrants that at the time of delivery the Products will be free from material defects in workmanship and materials under normal use and will conform substantially to Seller s applicable specifications. As Buyer s sole and exclusive remedy and Seller s entire liability for any breach of the foregoing warranty, Seller will, at its sole option and expense, either refund the purchase price paid, or repair or replace the Product which fails to meet this warranty upon return of the nonconforming Product; provided, Buyer notifies Seller of noncompliance in writing within sixty (60) days of delivery of such Product. These warranties do not apply to any Product that was not properly stored or handled by the Buyer, that was repaired or altered or was otherwise subject to abuse, neglect or improper use by Buyer, or that has any stage of processing performed on it which causes the defect. EXCEPT WITH RESPECT TO THE SPECIFIC WARRANTIES SET FORTH IN THIS PARAGRAPH, SELLER MAKES NO OTHER WARRANTIES WHATSOEVER, EXPRESS OR IMPLIED AND SPECIFICALLY DISCLAIMS ANY WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT WILL SELLER BE LIABLE TO BUYER FOR ANY INDIRECT, INCIDENTAL, SPECIAL, PUNITIVE, DELAY, OR CONSEQUENTIAL DAMAGES, INCLUDING WITHOUT LIMITATION, LOSS OF DIRECT OR INDIRECT PROFITS, REVENUE, OR USE, WHETHER ARISING IN CONTRACT, TORT, OR OTHERWISE, EVEN IF BUYER OR ANY OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES. IN NO EVENT WILL SELLER S AGGREGATE LIABILITY TO BUYER EXCEED ALL AMOUNTS ACTUALLY PAID BY BUYER TO SELLER. THESE LIMITATIONS SHALL APPLY NOTWITHSTANDING ANY FAILURE OF ESSENTIAL PURPOSE OF THE LIMITED REMEDY SET FORTH IN THIS PARAGRAPH. 12/2009 Rev.1 Contents of this book have been revised to reflect NEMA's publishing of ANSI/NEMA MW , Revision Magnet Wire. Please contact NEMA for information regarding the specific changes to the NEMA MW 1000 publication. magnet wire / winding wire i engineering data

3 ii engineering data CONTENTS ENGINEERING DATA Conductor Properties Round, Film-Insulated Wire (continued) Square, Served Wire Weights: (continued) Dimensions: Copper & Aluminum Medium Film Build: Copper Polyester Glass, Bare, Area, Weight and Resistance and s and Heavy Film: Copper Physical and Electrical Properties Heavy Build & Self-Bonding, Type : Copper Polyimide and Aromatic Polyimide Tapes Resistance Correction Factors s System s Standard s Recommended Winding Tensions Triple Build & Self-Bonding, Type : Copper s Rectangular Wire Dimensions, Area, Weight and s Dimensions: Resistance Values Single Film Build: Aluminum Heavy Film Build and s Served Wire Additions Round, Bare Wire Medium Film Build: Aluminum Double Polyester Glass Dimensions: and s Single Polyimide Tape and s Heavy Film Build: Aluminum Double Polyimide Tape Cross-Sectional Area: s 0 Single Aromatic Polyamide Paper s Resistance: Dimensions: Copper, Bare Weights: Self-Bonding Aluminum, Bare s Type, s Weights: s 0 Type, s Copper, Bare Resistance: Type, s Aluminum, Bare Copper, s Type, s Copper, s Preferred Number Series s Aluminum, s Round, Served Wire Aluminum, s Dimensions: Polyester Glass and Polyimide Tape Rectangular Wire Preferred Number Series Summary 0 Round, Film-Insulated Wire and s Dimensions: Dimensions: Heavy Film Build Single Film Build Square, Bare Wire Served Wire Additions: s Dimensions and Area: Single Polyester Glass s and s Double Polyester Glass Medium Film Build Resistance and Weight: and s Copper, and s Bare Wire Heavy Film Build Aluminum, & s Dimensional Limits & Corner Radii s Weight Corner Losses s Square, Film-Insulated Wire Triple Film Build Dimensions: Rectangular, Bare and s 0 Heavy Film Build Weights: Weights: and s 0 Copper, Bare Single Film Build: Copper Aluminum, Bare s Resistance: s Copper, Bare Aluminum, Bare

4 engineering data Copper and Aluminum CROSS-SECTIONAL AREA CONDUCTOR PROPERTIES AREA, WEIGHT AND RESISTANCE Round Wire For round conductor, where the cross-sectional area may be more Circular Mil Area = D 2 conveniently expressed in Circular Mils, the following formulas are Square Mil Area = /4 D 2 = D 2 useful: Square Inch Area = x 10-6 D 2 General Formula: Lbs./1000 Ft. = (d) (D 2 ) Where: D= Diameter of bare conductor in mils (1/1000 inches), i.e " Diam. = 40.3 mils Copper: Lbs./1000 Ft. = D 2 Aluminum: Lbs./1000 Ft. = D 2 Square and Rectangular Wire Where: D = Diameter of bare conductor, mils. Circular Mil Area = (WT R 2 ) d = Density of conductor metal, grams/cm 3. Square Mil Area = WT R 2 Formulas for weight are based on density of 8.89 for copper Square Inch Area = 1 x 10-6 (WT R 2 ), or and for aluminum. = wt r 2, when w, t and r are expressed in inches. Note: 1 sq. mil = 10-6 sq. inches. CONDUCTOR RESISTANCE: Ohms Per 1000 Feet Where: T = Thickness in mils. W = Width in mils. Round Conductor: R = Corner Radius in mils. General Formula: Ohms/1000 Ft. = 1000 R For square wire: W = T. D 2 For rectangular wire with full round edges: Copper: Ohms/1000 Ft. = R = T D 2 2 Note: When calculations involve any of the following Aluminum: Ohms/1000 Ft. = standard ASTM corner radii, the values for Corner D 2 Area Loss listed below may be substituted for the Where: R = Volume resistivity, ohm x circ.mil / ft. term "0.8584R 2 " in the above formulas. D = Bare conductor diameter, mils. Nominal ASTM* Corner Area Corner Radii (Inches) Loss Factors WEIGHT OF BARE CONDUCTOR (cont'd) Square and Rectangular Conductor: General Formula: Ohms/1000 Ft. = R A Copper: Ohms/1000 Ft. = A Aluminum: Ohms/1000 Ft. = A Where: R = Volume resistivity, ohm x circ. mil / ft. 1 Copper = ohm x circ. mil / ft. * ASTM Standard B 48 for Copper and Aluminum = ohm x circ. mil / ft. ASTM Standard B 324 for Aluminum. A = Cross-sectional area, square mils. WEIGHT OF BARE CONDUCTOR 1 The volume resistivity factors at 20 C are based on conductivities of 100% copper, and 61.8% aluminum IACS for soft, annealed conductors. Conductivities for hard drawn conductors are: Copper 97% and Aluminum 61%. Ohms Per Pound Pounds Per 1000 Feet For any conductor, Ohms/Lb. = Ohms/1000 Ft. General Formula: Lbs./1000 Ft. = (d) (A) Lbs./1000 Ft. Copper: Lbs./1000 Ft. = A Aluminum: Lbs./1000 Ft. = A Feet Per Ohm Where: A = Bare conductor cross-sectional area in square mils. For any conductor, Feet/Ohm = 1000 d = Density of conductor, grams/cm3 Ohms/1000 Ft.

5 engineering data Copper & Aluminum PHYSICAL AND ELECTRICAL PROPERTIES Physical Properties Copper Aluminum Electrical Properties Copper Aluminum Density, 0 C ( F) IACS Volume Conductivity, Minimum %, Pounds/Inch C ( F) Grams/Centimeter..0 Volume Resistivity, Maximum 0 C ( F) Thermal Capacity, 0 C ( F) (Ohm) x (circular mil) / foot 0.. BTU/Pound/ F (Ohm) x (millimeter )/ meter Thermal Conductivity, 0 C ( F) Weight Resistivity, Maximum 0 C ( F) BTU/Foot /Sec/ F/Inch. 0. (Ohm) x (pound) / mile.0 0. Gram-calories/mm /Sec/ C/cm (Ohm) x (gram) / meter Thermal Coefficient of Expansion, Linear Thermal Coefficient of Resistance, 0 C ( F) Change in Unit Length at 0 C/ C. x 0 -. x 0 - Change in Unit Resistance at 0 C/ C Melting Point C 0 0 F 0 0 Tensile Characteristics, Annealed, 0 C ( F) Ultimate Strength Pounds/Inch,000-0,000,000 -,000 Kilograms Force/mm Yield Strength, 0.% Off-Set Pounds/Inch,000 -,000,000 -,000 Kilograms Force/mm equivalent resistivity values Material Volume Conductivity at 20 C (68 F) Percent IACS CONDUCTOR PROPERTIES Volume RESISTIVITY CONSTANTS AT 20 C (68 F) Ohm-circ. mil per foot Ohm-mm 2 per meter Microhm-inch Microhm-centimeter Copper Aluminum Weight Ohm-pound per mile 2 Ohm-gram per meter

6 engineering data CONDUCTOR PROPERTIES Copper & Aluminum RESISTANCE CORRECTION FACTORS Based on Temperature Coefficient of Resistance (α 0 ) Where: Note: Copper (00% IACS), α 0 = 0.00 R 0 = Resistance at reference temperature, 0 C Aluminum (.% IACS), α 0 = R T = Resistance at other temperature, T C Wire resistance corrections outside the range of the above table may be calculated using the following formulas: () R 0 = R T or + α0 (T-0) () R T = R 0 { + α0 (T-0)} To Reduce Known R T to R 20, Multiply R T By: To Convert Known R 20 to R T Multiply R 20 By: Temperature C Copper Aluminum Copper T = α0 = Aluminum The temperature at which measurement is made (Eq. #) or to which reference resistance is to be converted (Eq. #). Temperature Coefficient of Resistance at reference temperature for conductor metal used.

7 engineering data ROUND, CONDUCTOR PROPERTIES Copper & Aluminum SYSTEM Although there is a world-wide trend to the International System (SI) or metric measurement, the current practice in wire measurement in the United States is generally the use of the customary English units. The current practice of the National Institute of Standards and Technology (NIST), The Institute of Electrical and Electronics Engineers (IEEE) and The American Society for Testing and Materials (ASTM) is to reflect American Wire Gauge in parallel with the metric units of measurement. In the technical tables of this publication, this parallel practice is reflected. The American Wire Gauge, like some other gauge systems, does generally represent steps in the wire drawing process. In addition to that, the numbers are retrogressive to the wire size - that is, the larger the number the smaller the wire. These gauge sizes are not arbitrary, but are a geometric progression. With the definition of two sizes in the series of gauge sizes, all size related properties of any gauge in the series is defined by that relationship. With 0000 as 0.00 inch and as and gauge sizes between these two, the ratio of any diameter to the next larger diameter can be determined as follows: = 92 = The square of this ratio is:.0 This square of the ratio between sizes can be used as a means of obtaining the resistance, mass and cross-section of any wire size if one has memorized these values for only one size. This conversion number can be easily remembered as.. Therefore: Knowing 0 has a cross-section of 00 circular mils tells us will have / x 00 or approximately 0 circular mils. If we had memorized the resistance of 0 as 0 ohms/000 feet, would have less resistance by 0 / or approximately ohms/000 feet. Since the function is geometric, the cube of this / is approximately. This allows you to easily calculate the dimensional functions in gauge increments. Every three gauge sizes the resistance, mass per unit length, and cross-section will double or halve. Then with a 0 cross-section of 00 circular mils, will be approximately 00 mils and will be approximately 0 circular mils. Using this relationship, with the commitment to memory of the crosssectional area, resistance and mass per unit length for any one size, you can move quickly to the value for any other wire size. For diameter calculation, remembering one diameter, the diameter will double or halve every six gauges and for each gauge the next larger gauge diameter is 0% or. times the smaller gauge. If you remember six contiguous gauges in mils, e.g. -, you would know all diameters by this rule. Actually, if you just remember as. mils and the spread between these gauges is. mil except between and 0 where it is. mil and and is. mil, you will have quick access to all gauge diameters.

8 Note: Start-up acceleration surge can produce tensions well in excess of running tensions and need to be taken into consideration. magnet wire / winding wire engineering data ROUND, CONDUCTOR PROPERTIES Copper & Aluminum WINDING TENSIONS COPPER ALUMINUM COPPER ALUMINUM WHOLE WHOLE Recommended Recommended Recommended Recommended SIZE Maximum* Maximum* SIZE Maximum* Maximum* Tension (Lbs.) Tension (Lbs.) Tension (Grams) Tension (Grams) ***. 0. ***..0 ***.. 0 *** 0.. ***.. 0 ***.. ***.. ***. 0. *** ***..0 ***. 0. ***.. ***.. *** 0.. ***.. *** Grams. Grams. 0 Grams. Grams This table contains the maximum recommended winding tensions and is offered as a guide to establishing effective winding tensions. Use the minimum winding tension that produces a good winding. The type of winder, payoff device, and type of coil will vary the tensions used. Some minor variations in the softness of the wire from one lot to another may also dictate minor adjustments. * Maximum recommended tensions are based upon,000 p.s.i. for copper and,00 p.s.i. for aluminum. The units are listed in Lbs. unless indicated by "Grams".

9 ROUND, BARE WIRE Copper & Aluminum Bare Wire Diameter Bare Wire Diameter Minimum Nominal Maximum Minimum Nominal Maximum Inches mm Inches mm Inches mm Inches mm Inches mm Inches mm DIMENSIONS 4/ /0 3/ /0 2/ /0 1/ / Nominal The nominal bare wire diameters, in inches, in this table are calculated using the basic mathematical characteristics of the American Wire Gauge: X = (0.0050)( )(36-N) Where: X = nominal bare wire diameter in inches to be determined 36 = the number of the base diameter = nominal base diameter in inches for 36 N = the equivalent number of X, where N is normally a whole number = = the ratio of the diameter of any size to the (smaller) diameter of the next larger size. For sizes 4/0 to 2/0, N is a negative number from -3 to -1. magnet wire / winding wire 6 engineering data

10 engineering data ROUND, BARE WIRE Copper & Aluminum CROSS-SECTIONAL AREA Minimum Nominal Maximum Circ. Mils Sq. mm. Sq. Mils. Sq. In. Circ. Mils Sq. mm. Sq. Mils. Sq. In. Circ. Mils Sq. mm. Sq. Mils. Sq. In E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E-06 46

11 engineering data Copper & Aluminum CROSS-SECTIONAL AREAS ROUND, BARE WIRE Minimum Nominal Maximum Circ. Mils Sq. mm. Sq. Mils. Sq. In. Circ. Mils Sq. mm. Sq. Mils. Sq. In. Circ. Mils Sq. mm. Sq. Mils. Sq. In. 1 ½ E E E-02 1 ½ 2 ½ E E E-02 2 ½ 3 ½ E E E-02 3 ½ 4 ½ E E E-02 4 ½ 5 ½ E E E-02 5 ½ 6 ½ E E E-02 6 ½ 7 ½ E E E-02 7 ½ 8 ½ E E E-02 8 ½ 9 ½ E E E-03 9 ½ 10 ½ E E E ½ 11 ½ E E E ½ 12 ½ E E E ½ 13 ½ E E E ½ 14 ½ E E E ½ 15 ½ E E E ½ 16 ½ E E E ½ 17 ½ E E E ½ 18 ½ E E E ½ 19 ½ E E E ½ 20 ½ E E E ½ 21 ½ E E E ½ 22 ½ E E E ½ 23 ½ E E E ½ 24 ½ E E E ½ 25 ½ E E E ½ 26 ½ E E E ½ 27 ½ E E E ½ 28 ½ E E E ½ 29 ½ E E E ½ 30 ½ E E E ½ 31 ½ E E E ½ 32 ½ E E E ½ 33 ½ E E E ½ 34 ½ E E E ½ 35 ½ E E E ½ 36 ½ E E E ½ 37 ½ E E E ½ 38 ½ E E E ½ 39 ½ E E E ½ 40 ½ E E E ½ 41 ½ E E E ½ 42 ½ E E E ½ 43 ½ E E E ½ 44 ½ E E E ½

12 engineering data Lbs. Per 1000 ft. Kg per Kilomtr Lbs. Per 1000 ft. Kg per Kilomtr Lbs. Per 1000 ft. ROUND, BARE WIRE Copper & Aluminum WEIGHTS COPPER ALUMINUM Minimum Nominal Maximum Minimum Nominal Maximum Kg per Kilomtr Lbs. Per 1000 ft. Kg per Kilomtr Lbs. Per 1000 ft. Kg per Kilomtr Lbs. Per 1000 ft. Kg per Kilomtr 4/ /0 3/ /0 2/ /0 1/ / *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** 46

13 10 engineering data Lbs. Per 1000 Ft. COPPER Minimum Nominal Kg per Kilometer Lbs. Per 1000 Ft. Kg per Kilometer Lbs. Per 1000 Ft. ROUND, BARE WIRE Copper & Aluminum WEIGHTS ALUMINUM Maximum Minimum Nominal Maximum Kg per Kilometer Lbs. Per 1000 Ft. Kg per Kilometer Lbs. Per 1000 Ft. Kg per Kilometer Lbs. Per 1000 Ft. Kg per Kilometer 1 ½ ½ 2 ½ ½ 3 ½ ½ 4 ½ ½ 5 ½ ½ 6 ½ ½ 7 ½ ½ 8 ½ ½ 9 ½ ½ 10 ½ ½ 11 ½ ½ 12 ½ ½ 13 ½ ½ 14 ½ ½ 15 ½ ½ 16 ½ ½ 17 ½ ½ 18 ½ ½ 19 ½ ½ 20 ½ ½ 21 ½ ½ 22 ½ ½ 23 ½ ½ 24 ½ ½ 25 ½ ½ 26 ½ ½ 27 ½ ½ 28 ½ ½ 29 ½ ½ 30 ½ *** *** *** *** *** *** 30 ½ 31 ½ *** *** *** *** *** *** 31 ½ 32 ½ *** *** *** *** *** *** 32 ½ 33 ½ *** *** *** *** *** *** 33 ½ 34 ½ *** *** *** *** *** *** 34 ½ 35 ½ *** *** *** *** *** *** 35 ½ 36 ½ *** *** *** *** *** *** 36 ½ 37 ½ *** *** *** *** *** *** 37 ½ 38 ½ *** *** *** *** *** *** 38 ½ 39 ½ *** *** *** *** *** *** 39 ½ 40 ½ *** *** *** *** *** *** 40 ½ 41 ½ *** *** *** *** *** *** 41 ½ 42 ½ *** *** *** *** *** *** 42 ½ 43 ½ *** *** *** *** *** *** 43 ½ 44 ½ *** *** *** *** *** *** 44 ½

14 11 engineering data Ohms per 1000 Ft. Ohms per Kilomtr Ohms per 1000 Ft. ROUND, BARE WIRE Copper RESISTANCE BARE CONDUCTOR RESISTANCE Minimum* Nominal Maximum Nominal Ohms per Kilomtr Ohms per 1000 Ft. Ohms per Kilomtr * Minimum resistance values are based on maximum bare diameter and 0.% IACS conductivity. Nominal and maximum resistance values are based on nominal bare diameter and 00.0% IACS conductivity. Feet per Ohm Nominal Meters per Ohm

15 12 engineering data ROUND, BARE WIRE Copper RESISTANCE BARE CONDUCTOR RESISTANCE Minimum* Nominal Maximum Nominal Nominal Ohms per Ohms per Ohms per Ohms per Ohms per Ohms per Feet per Meters per 1000 Ft. Kilomtr 1000 Ft. Kilomtr 1000 Ft. Kilomtr Ohm Ohm 1 ½ ½ 2 ½ ½ 3 ½ ½ 4 ½ ½ 5 ½ ½ 6 ½ ½ 7 ½ ½ 8 ½ ½ 9 ½ ½ 10 ½ ½ 11 ½ ½ 12 ½ ½ 13 ½ ½ 14 ½ ½ 15 ½ ½ 16 ½ ½ 17 ½ ½ 18 ½ ½ 19 ½ ½ 20 ½ ½ 21 ½ ½ 22 ½ ½ 23 ½ ½ 24 ½ ½ 25 ½ ½ 26 ½ ½ 27 ½ ½ 28 ½ ½ 29 ½ ½ 30 ½ ½ 31 ½ ½ 32 ½ ½ 33 ½ ½ 34 ½ ½ 35 ½ ½ 36 ½ ½ 37 ½ ½ 38 ½ ½ 39 ½ ½ 40 ½ ½ 41 ½ ½ 42 ½ ½ 43 ½ ½ 44 ½ ½ * Minimum resistance values are based on maximum bare diameter and 0.% IACS conductivity. Nominal and maximum resistance values are based on nominal bare diameter and 00.0% IACS conductivity.

16 Values are based on a resistivity of. ohm - circ. mil/ft. at 0 C (.% IACS Conductivity) for soft, annealed 0 (EC) aluminum. In practice, conductors of higher conductivity will often be encountered, yielding a resistance lower than that specificed when conductor dimensions are at or near maximum tolerance limits. magnet wire / winding wire 13 engineering data ROUND, BARE WIRE Aluminum RESISTANCE BARE CONDUCTOR RESISTANCE Minimum* Nominal Maximum** Nominal Nominal Feet Ohms per Ohms per Ohms per Ohms per Ohms per Ohms per Meters per per Ohm 1000 Ft. Kilomtr 1000 Ft. Kilomtr 1000 Ft. Kilomtr Ohm * Minimum resistance values are based on maximum bare diameter. ** Maximum resistance values are based on minimum bare diameter.

17 Values are based on a resistivity of. ohm - circ. mil/ft. at 0 C (.% IACS Conductivity) for soft, annealed 0 (EC) aluminum. In practice, conductors of higher conductivity will often be encountered, yielding a resistance lower than that specified when conductor dimensions are at or near maximum tolerance limits. magnet wire / winding wire 14 engineering data ROUND, BARE WIRE Aluminum RESISTANCE BARE CONDUCTOR RESISTANCE Minimum* Nominal Maximum** Nominal Nominal Ohms per Ohms per Ohms per Ohms per Ohms per Ohms per Feet per Meters per 1000 Ft. Kilometer 1000 Ft. Kilometer 1000 Ft. Kilometer Ohm Ohm 1 ½ ½ 2 ½ ½ 3 ½ ½ 4 ½ ½ 5 ½ ½ 6 ½ ½ 7 ½ ½ 8 ½ ½ 9 ½ ½ 10 ½ ½ 11 ½ ½ 12 ½ ½ 13 ½ ½ 14 ½ ½ 15 ½ ½ 16 ½ ½ 17 ½ ½ 18 ½ ½ 19 ½ ½ 20 ½ ½ 21 ½ ½ 22 ½ ½ 23 ½ ½ 24 ½ ½ 25 ½ ½ 26 ½ ½ 27 ½ ½ * Minimum resistance values are based on maximum bare diameter. ** Maximum resistance values are based on minimum bare diameter.

18 Copper & Aluminum WHOLE SIZE ROUND, SINGLE BUILD FILM-INSULATED WIRE Bare Wire Diameter Increase in Diameter Due to Film Coating Overall Diameter of Film-Coated Wire Minimum Nominal Maximum Minimum Maximum Inches mm Inches mm Inches mm Inches mm Inches mm DIMENSIONS WHOLE SIZE From NEMA Standards Publication No. MW magnet wire / winding wire 15 engineering data

19 ROUND, SINGLE BUILD FILM-INSULATED WIRE Copper & Aluminum DIMENSIONS HALF SIZE Bare Wire Diameter Minimum Nominal Maximum Increase in Diameter Due to Film Coating Overall Diameter of Film-Coated Wire Minimum Maximum Inches mm Inches mm Inches mm Inches mm Inches mm HALF SIZE From NEMA Standards Publication No. MW magnet wire / winding wire 16 engineering data

20 17 engineering data Copper & Aluminum Increase in Diameter Overall Diameter of Due to Film Coating Film-Coated Wire Minimum Maximum Inches mm Inches mm Inches mm Inches mm Inches mm ROUND, MEDIUM BUILD FILM-INSULATED WIRE Bare Wire Diameter Minimum Nominal Maximum Bare Wire Diameter Increase in Diameter Due to Film Coating Overall Diameter of Film-Coated Wire DIMENSIONS Minimum Nominal Maximum Minimum Maximum Inches mm Inches mm Inches mm Inches mm Inches mm 14 ½ ½ 15 ½ ½ 16 ½ ½ 17 ½ ½ 18 ½ ½ 19 ½ ½ 20 ½ ½ 21 ½ ½ 22 ½ ½ 23 ½ ½ 24 ½ ½ 25 ½ ½ 26 ½ ½ 27 ½ ½ 28 ½ ½ 29 ½ ½ 30 ½ ½ 31 ½ ½ 32 ½ ½

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