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1. Scope
This Standard specifies thermal class 200℃MW35C enameled copper wires to be
used in windings and wirings of electric machines and apparatus, electric
communication equipment, electronic equipment and electrical instruments.
2. Classes and Symbols
The wires are classified according to the conductor and thickness of film, and the
classes and symbols is as Table 1.
Table 1
Class
Class Heavy film Polyester over coated with polyamide-
imide enameled copper wire
Class Single film Polyester over coated with polyamide-
imide enameled copper wire
3. Thermal Class
TI：200℃
4. Characteristics
The characteristics of the wires shall comply with Table 2, when tested in accordance
with 6.
Symbol
MW35C HY
MW35C SL
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Table 2
Test Method
Test items
Characteristics
Comply with Attached Table4
Single Class
Heavy
Class
Test requirements
——
L=5M
AWG
Size
14~20
21~30
Elonga-
tion
20%
15%
Mandrel
Winding
3d
1d
Clause
Used
6.1
6.2
Dimensions
Pinhole
5Max
3Max
Flexibility
The coating shall show no crack on
the conductor
20%(Or to
its
breaking
31~44
point,
whichever
is
less)
6.3
3d
Adhesion
Abrasion
Breakdown Voltage
Cut through
No cracks visible in the film such as
to expose the conductor
Comply with Attached Table
Comply with Attached Table4
Not cut through at 300℃, 2min
——
——
——
——
6.4
6.5
6.6
6.7
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Continuous Table 2
Test Methods
Test items
Characteristics
Test requirements
AWG
Elong-at
Size
ion
14~30
20%
20%(Or to
Mandrel
Winding
3d
Clause
Used
Heat shock resistance
No cracks visible in the film such as to
expose the conductor
its
breaking
31~44
point,
whichever
is less)
3d
6.8
The specimen shall be heated
to220±5℃ in 3d for half an hour
Solvent resistance
Conductor Resistance
Elongation
No bubbles or blisters visible in the film,
with nail or 2H, film shall not be peeled
off to expose the conductor
Comply with Attached Table4
Comply with Attached Table4
Pencil method
——
——
6.9
6.10
6.11
5. Conductor, Insulating Film and Appearance
5.1 Conductor
The conductor for class-2 shall be copper wire specified in JISC 3103-Annealed
Copper Wires for Windings of Electric Machines.
5.2 Insulating Film
The insulating film of the wire shall be made by baking polyurethane and over
coated with polyamide insulating varnish for enameled wires on the conductor
uniformly. The film shall be harmless to the conductor and shall have sufficient
durability.
5.3 Appearance
No scratches, to be smooth surface and uniform luster and hue, not sticky, not to be
readily scratched off by fingernail Testing Methods. The wire shall be wind the
bobbin, no cracks and dirt visible on appearance.
6.Test methods
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