FLEXIBILITY AND ADHERENCE MANDREL WINDING TEST REQUIREMENTS FOR ENAMELLED ROUND COPPER WINDING WIRES
(BASIS : IS 13730 - .. & IS 13778 - 3)
Nominal Conductor Diameter Elongation
before
mandrel
winding(%)
Mandrel Winding Test Requirement
Over Upto to & Including From Upto to & Including
Part 3 : Polyester copper wires, Class 155
Part 8 : Polyesterimide copper wires, Class 180
(mm) (SWG) Part 13 : Dual Coated PE (PEI) + PAI, Class 200
0.050 0.063 47 46 15 0.150 mm
0.063 0.080 - 45 10 0.150 mm
0.080 0.112 44 41 5 0.150 mm
0.112 0.140 40 39 0 0.150 mm
0.140 1.600 38 17 0 1 x d
1.600 5.000 16 14 0 32 % linear elongation
Note :1) DefinItion of Crack : An opening in the insulation which exposes the conductor, view at the stated magnification
2) Magnification : 10 - 15 times for conductor diameter up to & including 0.040 mm
6 - 10 times for conductor diameter over 0.040 mm up to & including 0.50 mm
Normal vision or upto 6 times for conductor diameter over 0.50 mm.
Note: In view of continuous improvements in design & process specifications given above are subject to change without notice.