TYPE
Nominal Area (conductor)
No. of Component wires/Dia. of component wires
Approx. Outside Diameter (conductor)
Nominal Thickness of Insulation
Approximate Overall Diameter
Conductor Resistance at 20
o
C
.
.
.
.
Minor
Major
.
.
mm
2
mm
mm
mm
mm
ohm / km
SPT-1
0.30
12c x 0.18
0.7
0.8
2.3
4.6
58.8
.
0.50
20c x 0.18
0.9
0.8
2.5
5
36.7
.
0.75
30c x 0.18
1.1
0.8
2.7
5.4
24.4
.
0.75
67 c x 0.12
1.1
0.8
2.7
5.4
24.4
SPT- 2
1.25
50c x 0.18
1.5
1.2
3.9
7.8
14.7
.
1.25
112c x 0.12
1.5
1.2
3.9
7.8
14.7
SPT- 3
2.00
37c x 0.26
1.8
2
5.8
11.6
9.5
Reference:
PNS 163 - Electrical Products - Polyvinyl Chloride Insulated Flexible Cords Specification
