current rating for pvc non-armoured cables

single core with copper conductor

Conductor Bunched & Enclosed in Conduit or Trunking Clipped Direct to a Surface or on a Cable TrayBunched or Unenclosed
Nominal Cross-Sectional Area No. and Diameter of Wires 2 Cables Single-Phase A.C. or D.C. 3 or 4 Cables, Three-Phase A.C. 2 Cables Single-Phase A.C. or D.C. 3 or 4 Cables, Three-Phase A.C.
Current Rating Volt Drop per amp. per metre* Current Rating Volt Drop per amp. per metre* Current Rating Volt Drop per amp. per metre* Current Rating Volt Drop per amp. per metre*
mm2 mm A mV A mV A mV A mV

1.0

1.5

2.5

4

6

10

16

25

35

 

50

70

95

120

150

185

240

300

400

500

630

1/1.13

1/1.38

1/1.78

7/0.85

7/1.04

7/1.35

7/1.70

7/2.14

19/1.53

 

19/1.78

19/2.14

19/2.52

37/2.03

37/2.25

37/2.52

61/2.25

61/2.25

61/2.85

61/3.20

127/2.52

11

13

18

24

31

42

56

73

90

 

145

185

230

260

-

-

-

-

-

-

-

40

27

16

10

608

4.0

2.6

1.6

1.2

A.C.       D.C.

0.97      0.91

0.71      0.63

0.56      0.45

0.48      0.36

-            -

-            -

-            -

-            -

-            -

-            -

-            -

9

11

16

22

28

39

50

66

80

 

125

160

195

220

-

-

-

-

-

-

-

35

23

14

8.8

5.9

3.5

2.2

1.4

1.0

 

0.84

0.62

0.48

0.42

-

-

-

-

-

-

-

13

16

23

30

38

51

68

89

109

 

175

220

270

310

355

405

480

560

680

800

910

40

27

16

10

6.8

4.0

2.6

1.6

1.2

A.C.       D.C.

0.93      0.91

0.65      0.63

0.48      0.45

0.40      0.36

0.34      0.29

0.29      0.24

0.24      0.18

0.22      0.14

0.20      0.12

0.18      0.086

0.17      0.068

12

15

20

27

34

46

61

80

98

 

160

200

240

280

320

365

430

500

610

710

820

35

23

14

8.8

5.9

3.5

2.2

1.4

1.0

 

0.82

0.59

0.45

0.38

0.34

0.30

0.27

0.25

0.24

0.23

0.22


twin and multicore with copper conductor

Conductor Enclosed in Conduit or Trunking Clipped Direct to a Surface or on a Cable Tray Unenclosed
Nominal Cross-Sectional Area No. and Diameter of Wires One Twin Cable with or Without Earth continuity Conductor, Single-Phase A.C. or D.C. One Three-Core Cable, with or without earth continuity conductor, or one 4-core, 3-phase One Twin Cable with or Without Earth continuity Conductor, Single-Phase A.C. or D.C. One Three-Core Cable, with or without earth continuity conductor, or one 4-core, 3-phase
Current Rating Volt Drop per amp. per metre* Current Rating Volt Drop per amp. per metre* Current Rating Volt Drop per amp. per metre* Current Rating Volt Drop per amp. per metre*
mm2 mm A mV A mV A mV A mV

1.0 +

1.5 +

2.5 +

4 +

6 +

10 +

16 +

25 ++

35 ++

1/1.13

1/1.38

1/1.78

7/0.85

7/1.04

7/1.35

7/1.70

7/2.14

19/1.53

11

13

18

24

30

40

53

60

74

40

27

16

10

6.8

4.0

2.6

1.7

1.2

9

12

16

22

27

37

47

53

65

35

23

14

8.8

5.9

3.5

2.2

1.5

1.0

12

15

21

27

35

48

64

71

87

40

27

16

10

6.8

4.0

2.6

1.7

1.2

10

13

18

24

30

41

54

62

72

35

23

14

8.8

5.9

3.5

2.2

1.5

1.0

Note:
+ Flat Cable Only.
++ Circular Cable
* The colt drops between the consumer’s terminals and any other point the installation must not exceed 2.5% of the nominal voltage.

CURRENT RATING FOR PVC NON-ARMOURED CABLES

TWIN AND MULTICORE WITH COPPER CONDUCTOR

Nominal cross-sectional aera of conductor No. and diameter of wire Clipped direct to a surface or on a cable tray and unenclosed
One twin cable, single phase ac or dc One 3 or 4-core cable 3-phase
Current Rating Volt Drop per amp per metre* Current Rating Volt Drop per amp per metre*
ac dc
mm2 mm A mV mV A mV

50

70

95

120

150

185

240

300

19/1.78

19/2.14

19/2.52

37/2.03

37/2.25

37/2.52

61/2.25

61/2.52

140

175

215

250

285

325

385

445

0.94

0.66

0.49

0.40

0.33

0.28

0.24

0.21

0.93

0.64

0.46

0.37

0.30

0.24

0.19

0.15

125

155

190

215

250

280

335

390

0.81

0.57

0.42

0.34

0.29

0.24

0.20

0.18


SINGLE-CORE WITH ALUMINUM CONDUCTOR

Conductor Nominal Cross-Sectional Area Bunched and Enclosed in Conduit Trunking Clipped direct to a surface or on cable tray and unenclosed
2 Cables, Single-Phase A.C. or D.C. 3 or 4 Cables 3-Phase A.C. 2 Cables, Single-Phase A.C. or D.C. 3 or 4 Cables 3-Phase A.C.
Current Rating Volt Drop Per Amp. Per Metre* Current Rating Volt Drop Per Amp. Per Metre* Current Rating Volt Drop Per Amp. Per Metre* Current Rating Volt Drop Per Amp. Per Metre*
A.C D.C
mm2 A mV mV A mV A mV mV A mV

16

25

35

50

70

95

120

150

185

240

300

400

500

630

60

78

96

120

150

175

205

235

-*

-

-

-

-

-

4.5

2.9

2.1

1.6

1.2

0.93

0.80

0.73

-

-

-

-

-

-

4.5

2.8

2.0

1.5

1.0

0.75

0.60

0.49

-

-

-

-

-

-

52

67

83

100

125

150

175

200

-

-

-

-

-

-

3.9

2.5

1.8

1.4

1.0

0.80

0.70

0.64

-

-

-

-

-

-

72

94

115

140

175

210

240

275

320

380

440

530

620

720

4.5

2.8

2.1

1.5

1.1

0.77

0.62

0.51

0.42

0.34

0.29

0.25

0.22

0.20

4.5

2.8

2.0

1.5

1.0

0.75

0.60

0.49

0.39

0.29

0.23

0.18

0.15

0.11

65

85

105

125

155

185

215

245

285

340

390

475

550

640

3.9

2.5

1.8

1.3

0.93

0.69

0.56

0.48

0.40

0.34

0.30

0.27

0.25

0.24

* The Volt drop between consumer’s terminals and any other point in the installation must not exceed 2.5% of the nominal voltage.


CURRENT RATING FOR PVC NON-ARMOURED CABLES

TWIN & MULTICORE WITH ALUMINUM CONDUCTORS

Conductor Nominal Cross-Sectional Area Enclosed in Conduit Trunking Clipped direct to a surface or on cable tray, Unenclosed
One Twin Cable Single-Phase A.C or D.C One 3 or 4-Core Cables 3-Phase AC One Twin Cable Single-Phase A.C or D.C One 3 or 4-Core Cables 3-Phase AC
Current Rating Volt Drop Per Amp. Per Metre* Current Rating Volt Drop Per Amp. Per Metre* Current Rating Volt Drop Per Amp. Per Metre* Current Rating Volt Drop Per Amp. Per Metre*
A.C D.C
mm2 A mV mV A mV A mV mV A mV

16

25

35

50

70

95

120

150

185

240

300

49

64

79

99

-

-

-

-

-

-

-

4.6

2.9

2.2

1.7

-

-

-

-

-

-

-

4.6

2.9

2.1

1.5

-

-

-

-

-

-

-

43

57

70

87

-

-

-

-

-

-

-

4.0

2.9

2.1

1.5

-

-

-

-

-

-

-

58

76

92

115

140

165

195

220

250

300

340

4.6

2.9

2.1

1.6

1.1

0.79

0.63

0.52

0.43

0.34

0.29

4.6

2.9

2.1

1.5

1.1

0.77

0.61

0.50

0.40

0.31

0.25

52

67

82

100

120

150

170

195

220

260

300

4.0

2.5

1.8

1.3

0.93

0.63

0.54

0.45

0.37

0.30

0.25


CURRENT RATING FOR ARMOURED CABLES

MULTICORE 1.5MM2- 3.5MM2

The rating tabulated apply only where the cables has coarse excess-current protection For close excess-current protection, the tabulated ratings must be multiplied by 1.33

Conductor Clipped Direct to a Surface or on aCable Tray, and Unenclosed Defined Conditions
Nominal Area Construction One Twin Cable, Single-Phase A.C. or D.C. One Three or Four-Core Cable, Three-Phase One Twin Cable, Single-Phase A.C. or D.C. One Three or Four-Core Cable, Three-Phase
Current Rating Volt Drop per Amp. Per meter* Current Rating Volt Drop per Amp. Per meter* Current Rating Volt Drop per Amp. Per meter* Current Rating Volt Drop per Amp. Per meter*
mm2 mm A mV A mV A mV A mV

1.5

2.5

4

6

10

16

25

35

1/1.38

3/1.04

7/0.85

7/1.04

7/1.35

7/1.70

7/2.14

19/1.53

14

20

26

32

45

58

76

93

28

17

11

7.0

4.1

2.6

1.7

1.2

13

17

22

28

38

50

66

80

24

15

9.1

6.0

3.6

2.2

1.5

1.0

-

-

-

38

52

68

91

112

-

-

-

7.0

4.1

2.6

1.7

1.2

-

-

-

32

44

58

77

94

-

-

-

6.0

3.6

2.2

1.5

1.0

Multicore 50MM2 - 400MM2

The rating tabulated apply only where the cables has close excess-current protection
For Coarse excess-current protection, the tabulated ratings must be multiplied by 1.75

Conductor Clipped Direct to a Surface or on a Cable Tray, and Unenclosed Defined Conditions
Nominal Area Construction One Twin Cable, Single-Phase A.C. or D.C. One Three or Four-Core Cable, Three-Phase One Twin Cable, Single-Phase A.C. or D.C. One Three or Four-Core Cable, Three-Phase
Current Rating Volt Drop per Amp. Per meter* Current Rating Volt Drop per Amp. Per meter* Current Rating Volt Drop per Amp. Per meter* Current Rating Volt Drop per Amp. Per meter*
A.C. D.C. A.C. D.C.
mm2 mm amp mV mV amp mV amp mV mV amp mV

50

70

95

120

150

185

240

300

400

19/1.78

19/2.14

19/2.52

37/2.03

37/2.25

37/2.52

61/2.25

61/2.52

61/2.85

150

180

225

260

290

340

400

460

520

0.92

0.65

0.48

0.40

0.32

0.29

0.25

0.23

0.22

0.92

0.64

0.46

0.36

0.25

0.23

0.18

0.14

0.11

125

155

190

220

250

290

350

400

460

0.81

0.57

0.42

0.34

0.29

0.24

0.20

0.18

0.17

180

220

270

310

355

410

485

550

620

0.92

0.65

0.48

0.40

0.32

0.29

0.25

0.23

0.22

0.92

0.64

0.46

0.36

0.25

0.23

0.18

0.14

0.11

155

190

230

270

310

350

420

475

550

0.81

0.57

0.42

0.34

0.29

0.24

0.20

0.18

0.17

* The Volt Drop between consumer's terminals and other point in insulation must not exceed 2.5% of the nominal voltage.