HEAT SHOCK TEST FOR ENAMELLED ROUND COPPER WINDING WIRES 
 (BASIS : IS 13730 - .. & IS 13778 - 6) 
Nominal Conductor
Diameter
Temperature & Mandrel Diameters (mm) & Stretching Requirements
Part 3
Polyester
Copper Wires
Class 155
Part 8
Polyesterimide
Copper Wires
Class 180
Part 13
PE (PEI) + PAI
Copper Wires
Class 200
(mm) (SWG)
Over Up to &
Including
From Up to &
Including
Heat Shock Temp. (  C) 175 200 220
0.050 0.063 47 46 0.150 (1) 0.150 (1) 0.150 (1)
0.063 0.080 - 45 0.150 (2) 0.150 (2) 0.150 (2)
0.080 0.112 44 41 0.150 (3) 0.150 (3) 0.150 (3)
0.112 0.140 40 39 0.150 0.150 0.150
0.140 0.160 39 38 0.250 0.250 0.250
0.160 0.180 38 37 0.280 0.280 0.280
0.180 0.200 - 36 0.315 0.315 0.315
0.200 0.224 - 35 0.355 0.355 0.355
0.224 0.250 - 34 0.400 0.400 0.400
0.250 0.280 33 32 0.630 0.630 0.630
0.280 0.315 31 30 0.710 0.710 0.710
0.315 0.355 - 29 0.800 0.800 0.800
0.355 0.400 - 28 0.900 0.900 0.900
0.400 0.450 - 27 1.000 1.000 1.000
0.450 0.500 - 26 1.120 1.120 1.120
0.500 0.560 25 24 1.250 1.250 1.250
0.560 0.630 - 23 1.400 1.400 1.400
0.630 0.710 - - 1.600 1.600 1.600
0.710 0.800 - 22 1.800 1.800 1.800
0.800 0.900 - 21 2.000 2.000 2.000
0.900 1.000 - 20 2.240 2.240 2.240
1.000 1.120 - 19 3.550 3.550 3.550
1.120 1.250 - 18 4.000 4.000 4.000
1.250 1.400 - - 4.500 4.500 4.500
1.400 1.600 - 17 5.000 5.000 5.000
1.600 5.000 16 11 25 % Stretch 25 % Stretch 25 % Stretch
Notes :
1) d = Nominal Conductor Diameter
2) D = Overall Diameter of the Wire
3) Elongation before winding on Mandrel
(1) = 15 % (or to the breaking point of conductor)
(2) = 10 % (or to the breaking point of conductor)
(3) = 5 % (or to the breaking point of conductor) 
Note: In view of continuous improvements in design & process specifications given above are subject to change without notice.