Number of Cores

Formation of Cores (Cores/units laid parallel and adjacent unless a width is specified)

3

4

7

8

12
(except 4mm²)

12
(4mm² only)

18
(except 4mm²)

18
(4mm² only)

Conductor

Radial Thickness of Insulation

Sheath Thickness

Nominal Cross Sectional Area

Maximum Diameter of Wires

3-core

4-core

7-core

8-core

12-core

18-core

mm²

mm

mm

mm

mm

mm

mm

mm

mm

1

0.21

0.60

1.20

1.20

1.20

1.20

1.20

1.30

1.5

0.26

0.80

1.20

1.20

1.20

1.20

1.50

1.50

2.5

0.26

0.90

1.20

1.50

1.50

1.50

1.80

1.80

4

0.31

1.00

1.80

1.80

1.80

1.80

1.80

2.50

6

0.31

1.00

1.80

1.80

1.80

-

-

-

10

0.41

1.20

1.80

2.10

2.80

-

-

-

16

0.41

1.20

1.80

2.10

3.10

-

-

-

25

0.41

1.40

1.90

2.30

-

-

-

-

35

0.41

1.40

2.10

2.60

-

-

-

-

50

0.41

1.60

2.30

2.90

-

-

-

-

70

0.51

1.60

2.50

3.20

-

-

-

-

95

0.51

1.80

3.00

3.80

-

-

-

-

120

0.51

1.80

3.20

4.10

-

-

-

-

Nominal Cross Sectional Area

Number/Diameter of Wires

Single Phase a.c. or d.c.

Three Phase a.c.

mm²

No./mm

Ampere

Ampere

0.5

16/0.20

3

3

0.75

24/0.20

6

6

1.0

32/0.20

10

10

1.25

40/0.20

13

-

1.5

30/0.25

16

16

2.5

50/0.25

25

20

4.0

56/0.30

32

25