Class 155 Polyester Glass Fiber Covered Fused and Unvarnished Bare or Heavy Film-insulated Round Copper Magnet Wire

Insulating Material

—The fiber covering shall consist of a combination of polyester and glass fibers.

—The glass fibers shall be electrical-grade continuous-filament glass yarn.

—The polyester fiber shall be a high-grade yarn resulting from the linear polymerization of ethylene glycol and terephthalic acid.

The maximum content by weight of polyester fiber in the yarn shall not exceed 50%. If underlying film insulation is used, it shall have at least a class 130 rating and comply with the applicable specifications of Polyester Film-Insulated Round Copper Magnet Wire Thermal Class 155. The polyester glass fiber covering shall be wrapped firmly, closely, evenly, and continuously around the wire. The polyester glass fiber covering shall be unvarnished and fused.

Thermal Class

155℃

Wire Form and Conductor

Round Copper Magnet Wire

General Requirements

Properties	Requirement
DIMENSIONS	Single 4/0-30 AWG in accordance with 0.411-1.819 mmDouble 4/0-30 AWG in accordance with 0.0184-0.2188 mm
ADHERENCE AND FLEXIBILITY	Covering shall not open sufficiently to expose the bare or film-insulated wireafter bending on mandrel sizes as follows: AWG Size Mandrel Diameter 4/0-9.5 10d 10-30 5d After a specimen has been elongated 25% or to its breaking point, whichever is less, there shall be no loosening, fraying, or loss of adherence of the covering except at the point of rupture
ELONGATION	Not less than the values of 10
SPRINGBACK	4/0-13 AWG polyester glass fiber covered bare: not greater than 5º4-13 AWG polyester glass fiber covered film-insulated: not greater than 5.5º
DIELECTRIC BREAKDOWN	Not less than the following: AWG Size MinimumBreakdown, Volts* Single Double 4/0-9.5 150 270 10-23 360 540 24-30 225 400 *For polyester glass fiber covered wire having underlying film insulation, add the minimum breakdown voltage for the film-insulated wire.

NOTE—This specification corresponds with IEC 60317-70-1 (under development).