Home » Technical Standard Data of Litz Wire Products
Please click each of the Tabs below.
The below wire gauge table compares BS AWG with SWG over appearing diameter(mm). For your reference, SWG means Standard Wire Gauge, AWG means American Wire Gauge and BS means British Standard.
Regarding the NEMA standard table, this table shows the conductor size as AWG would be insulated by single build or heavy build. Even if you may not find triple build on the table, it is actually more than heavy build. According to UL standard, Single Build = Class 2, Heavy Build = Class 1, Triple Build = Class 0. FYR, NEMA standard means National Electrical Manufacturers Association.
Data Table – Specification Comparison IEC 317 vs. NEMA MW 1000-1997
IEC No. | Status | Insulation Type | Round Conductor | Rectangular Conductor | Thermal Class | NEMA Equivalent |
---|---|---|---|---|---|---|
317-1 | Pub. | Polyvinyl Acetal | X | – | 105 | MW 15-C |
317-2 | Pub. | Solderable Polyurethane + Bonding layer | X | – | 130 | MW 3-C |
317-3 | Pub. | Polyester | X | – | 155 | MW 5-C |
317-4 | Pub. | Solderable Polyurethane | X | – | 220 | MW 75-C |
317-7 | Pub. | Polyimide | X | – | 180 | MW 16-C |
317-8 | Pub. | Polyester-imide | X | – | 130 | MW 30-C |
317-11 | Pub. | Bunched solderable polyurethane with silk covering | X | – | 120 | N/A |
317-12 | Pub. | Polyvinyl Acetal | X | – | 200 | N/A |
317-13 | Pub. | Polyester or polyesterimide + polyamideimide | X | – | 105 | MW 35-C |
317-14 | Pub. | Polyvinyl Acetal (aluminum) | X | – | 180 | MW 15-A |
317-15 | Pub. | Polyesterimide (aluminum) | X | – | 155 | MW 74-A(220) |
317-16 | Pub. | Polyester | X | – | 105 | N/A |
317-17 | Pub. | Polyvinyl Acetal | X | – | 120 | MW 18-C |
317-18 | Pub. | Polyvinyl Acetal | – | X | 130 | N/A |
317-19 | Pub. | Solderable Polyurethane + Polyamide | – | X | 130 | MW 28-C |
317-20 | Pub. | Solderable Polyurethane | – | X | 155 | MW 79-C |
317-21 | Pub. | Solderable Polyurethane + Polyamide | X | – | 155 | MW 80-C |
317-22 | Pub. | Polyester(imide)+Polyamide | X | – | 180 | MW 76-C |
317-23 | Pub. | Solderable Polyesterimide | X | – | 180 | MW 77-C |
317-24 | Pub. | Polyester(imide) + Polyamide(Aluminum) | X | – | 180 | MW 76-A(200) |
317-25 | Pub. | Polyester(imide) + Polyamideimide(Aluminum) | X | – | 200 | MW 35-A(220) |
317-26 | Pub. | Polyimideimide | X | – | 200 | MW 81-C |
317-27 | FDIS | Paper Cover | – | X | – | MW 33-C |
317-28 | Pub. | Polyesterimide | – | X | 180 | N/A |
317-29 | Pub. | Polyester(imide) + Polyamideimide | – | X | 200 | MW 36-C |
317-31 | Pub. | Bare or Enameled Polyester(imide) Varnish Trested, Glass Fiber Wound | – | X | 180 | MW 53-C |
317-32 | Pub. | Bare or Enameled Polyester(imide) Varnish Trested, Glass Fiber Wound | – | X | 155 | MW 42-C |
317-33 | Pub. | Bare or Enameled Polyester(imide) Varnish Trested, Glass Fiber Wound | – | X | 200 | MW 43-C |
317-34 | Pub. | Polyester | X | – | 130L | MW 5-C(155) |
317-35 | Pub. | Solderable Polyurethane + Bonding layer | X | – | 155 | Proposed |
317-36 | Pub. | Solderable Polyester(imide) + Bonding layer | X | – | 180 | Proposed |
317-37 | Pub. | Polyester(imide) + Bonding layer | X | – | 180 | Proposed |
317-38 | Pub. | Polyester(imide) +Polyamideimide + Bonding Layer | X | – | 200 | MW 102-C |
317-39 | Pub. | Bare or Enameled Polyester(imide) Varnish Trested, Glass Fiber Braided | – | X | 180 | N/A |
317-40 | Pub. | Bare or Enameled Polyester(imide) Varnish Trested, Glass Fiber Braided | – | X | 200 | N/A |
317-41 | Pub. | Solderable polyester | X | – | 130L | MW 26-C(155) |
317-42 | Pub. | Polyesteramide-imide | X | – | 200 | MW 74-C |
317-43 | Pub. | Aromatic Polyimide Tape(covered) | X | – | 240 | MW 63-C(220) |
317-44 | Pub. | Aromatic Polyimide Tape(covered) | – | X | 240 | MW 62-C(220) |
317-45 | FDIS | Polyester | X | – | 130 | MW 5-C(155) |
317-46 | Pub. | Aromatic Polyimide | X | – | 240 | MW 16-C |
317-47 | Pub. | Aromatic Polyimide | – | X | 240 | MW 20-C |
317-48 | CDV | Bare or Enameled + Glass Fiber Wound, impregnated | X | – | 155 | MW 41-C |
317-49 | CDV | Bare or Enameled + Glass Fiber Wound, impregnated | X | – | 180 | MW 30-C |
317-50 | CDV | Bare or Enameled + Glass Fiber Wound, impregnated | X | – | 200 | MW 44-C |
317-51 | CD | Polyurethane | X | – | 180 | Proposed |
317-52 | CDV | Aromatic Polyimide (aramid) Tape Wrapped | X | – | 330 | MW 61-C |
317-53 | CDV | Aromatic Polyimide (aramid) Tape Wrapped | – | X | 220 | MW 60-C |
NEMA standard
The following table explains KS Class 0 (Korean Standard). In case of 3.20mm, conductor’s tolerance is ±0.04mm, min. thickness of insulation film(enamel coating) is 0.049, max. overall diameter would be 3.388mm, max. conductor resistance is tested at 20℃ and unit of measure is Ω/km. FYR, class 0 = triple build.
The below table explains KS Class 1 (Korean Standard). In case of 3.20mm, conductor’s tolerance is ±0.04mm, min. thickness of insulation film(enamel coating) is 0.034, max. overall diameter would be 3.388mm, max. conductor resistance is tested at 20℃ and unit of measure is Ω/km. FYR, class 1 = heavy build.
The table shows KS Class 2 (Korean Standard). In case of 1.00mm, tolerance of diameter is ±0.012mm, min. minimum thickness of insulation film(enamel coating) is 0.017mm, maximum overall diameter would be 1.062mm, maximum conductor resistance is tested at 20℃ and unit of measure is Ω/km. FYR, class 2 = single build.
Regarding the table, Class 0 (Zero) SBH – EIW, it shows minimum insulation thickness of enamel film and maximum self bonding varnish thickness of film on TP(Top Coating). In case of 0.20mm, the overall diameter would be 0.254(±0.003mm). FYR, SBH-EIW’ features are bondable by heating without impregnating and excellent thermal stability. Its applications are deflection yoke coils and Magnet coils (clutch coil, vacuum cleaner motor, etc). Also, it means polyesterimide overcoated with self-bonding enameled wire, thermal index H(180℃), UL file number = E84441, product range : 0.12 ∼0.90 mm.
The below British Standard table explains conductor diameter range from normal, maximum and minimum. Even if there are same Grade 1(enamel coating thickness), the OD(outer diameter) could be little different because Grade 1 would be fabricated by working environment or enamel insulating repeating number. For example, some enamel insulating repeating number of Grade 1 should be 3 ~ 5 times.
Mtl Dsg | BC Coat | Overcoat | ANSI type | Temp. |
---|---|---|---|---|
AEW-R | Modified Polyester | Polyamideimide | MW 73C | 200 |
AI-EIW | Modified Polyester | Polyamideimide | MW 35C | 200 |
UEW-F | Polyurethane | – | MW 79C | 155 |
NPW | Polyester-Nylon | Nylon | MW 24C | 155 |
NUW | Polyurethane-Nylon | Nylon | MW 28C | 130 |
YHW-B | Polyurethane | – | MW 75C | 130 |
UEW-B | Polyurethane | – | MW 75C | 130 |
AIW | Polyamide-imide | – | MW 81C | 200 |
EIW | Polyester-imide | – | MW 5 | 155 |
***(Now under UL Application) / MW 80C / 155
The below table shows (i) NEC(National Electrical Code) copper wire ampacity with 60/70/90℃ insulation, (ii) Approx. stranded metric equivalents and (iii) copper’ fusing current(preece, onderdonk) as AWG size from 1 to 20.
The below table shows (i) NEC(National Electrical Code) copper wire ampacity with 60/70/90℃ insulation, (ii) Approx. stranded metric equivalents and (iii) copper’ fusing current(preece, onderdonk) as AWG size from 21 to 40.
The copper resistance and the area are tested by Ω per km, mΩ per meter, Ω per kFT and mΩ per ft as per AWG size from 1 to 20 on the table. Also, the turns of wire are checked by per inch and cm as before.
The copper resistance and the area are tested by Ω per km, mΩ per meter, Ω per kFT and mΩ per ft as per AWG size from 21 to 40 on the table. Also, the turns of wire are checked by per inch and cm as before.
You can see which AWG size of copper wire suitable is for your high frequency transformer or inductor(induction) via the below data. The strands and thickness of litz wire should be designed or constructed as per the frequency range, ampere, current and voltage etc. We, YDK, can provide you the solution of litz design to suit your working environment.