Conductor Insulation Seath (2 Core) Seath (3 Core) Seath (4 Core) Max. conductor D.C. resistance at 20 °C
Current rating at ambient temperature 40°C 
Size crosssectional area (mm)² Nos. & Dia. (mm) of wire Minimum thickness
(mm)
Minimum core dia
(mm)
Minimum thickness
(mm)
Overall diameter
(mm)
Minimum thickness
(mm)
Overall diameter
(mm)
Minimum thickness
(mm)
Overall diameter
(mm)
 (ohm/ km)  (A)
1.00 32/0.20 0.6 2.60 1.20 8.2 1.20 8.8 1.20 9.9 19.500 12.000
1.50 22/0.30 0.7 3.10 1.20 9.4 1.20 10.2 1.30 11.5 13.300 15.000
2.50 36/0.30 0.8 3.60 1.30 10.9 1.30 11.8 1.30 13.3 7.980 20.000
4.00 56/0.30 0.8 4.30 1.30 12.0 1.30 13.0 1.40 14.6 4.950 27.000
6.00 84/0.30 0.8 5.10 1.40 13.7 1.40 14.8 1.40 16.7 3.300 31.000
10.00 140/0.30 1.0 6.50 1.50 16.5 1.50 17.8 1.60 20.0 1.910 42.000
16.00 224/0.30 1.0 8.00 1.50 18.9 1.60 20.4 1.60 22.9 1.210 57.000
25.00 350/0.30 1.2 10.10 1.60 22.1 1.70 23.8 1.80 26.8 0.780 72.000
35.00 490/0.30 1.2 11.30 1.70 24.9 1.80 26.8 1.90 30.1 0.554 91.000
50.00 703/0.30 1.4 13.60 1.90 28.7 1.90 31.0 2.00 34.8 0.386 120.000
70.00 988/0.30 1.4 15.30 2.00 2.00 34.7 2.20 38.9 0.272 165.000
Conductor Insulation Max. conductor D.C. resistance at 20 °C
Current rating at ambient temperature 40°C
Size crosssectional area (mm)² Nos. & Dia. (mm) of wire Nos. & Dia. (mm) of wire Minimum thickness
(mm)
Minimum core dia
(mm)
(ohm/ km) (A)
0.50 16/0.20 0.6 2.20 39.000 4.000
0.75 24/0.20 0.6 2.30 26.000 7.000
1.00 32/0.20 1/1.13 0.6 2.70 19.500 11.000
1.50 30/0.25 7/ 0.54 0.7 3.10 13.300 14.000
2.50 50/0.25 7/0.67 0.7 3.70 7.980 18.000
4.00 56/0.30 7/0.85 0.8 4.60 4.950 26.000
6.00 84/0.30 7/1.05 0.8 5.30 3.300 31.000
10.00 140/0.30 7/1.35 1.0 6.50 1.910 42.000
16.00 224/0.30 7/1.70 1.0 8.00 1.210 57.000
25.00 350/0.30 7/2.14 1.2 10.00 0.780 72.000
35.00 490/0.30 7/2.52 1.2 11.20 0.554 90.000
50.00 703/0.30 19/1.82 1.4 13.60 0.386 115.000
70.00 988/0.30 19/2.16 1.4 15.30 0.272 143.000