cross-sectional area mmsq

Minimum average thickness of insulation mm

Nominal diameter over insulation
mm

Nominal thickness of PVC bedding
mm

Nominal number and diameter of armoured wires no./mm

Nominal thickness of PVC oversheath
mm

Nominal overall diameter of cable mm

50

3.4

17.0

1.4

50/2.5

2.6

53.1

70

3.4

18.8

1.4

54/2.5

2.7

57.1

95

3.4

20.5

1.5

59/2.5

2.8

61.2

120

3.4

22.0

1.6

62/2.5

3.0

65.0

150

3.4

23.3

1.6

65/2.5

3.1

68.0

185

3.4

25.1

1.7

70/2.5

3.2

72.3

240

3.4

27.3

1.8

61/3.15

3.4

79.0

300

3.4

29.6

1.9

65/3.15

3.6

84.5

400

3.4

32.3

2.0

70/3.15

3.8

90.9

cross-sectional area mmsq

Approximate cable weight kg/m

Nominal drum length
m

Minimum bending radius mm

Nominal internal diameter of ducts mm

50

5.5

750

650

100

70

6.4

500

700

100

95

7.5

500

750

100

120

8.6

500

800

100

150

9.6

450

850

125

185

11.2

450

900

125

240

14.2

450

950

125

300

16.5

350

1050

125

400

19.7

300

1100

125

cross-sectional area mmsq

Maximum DC resistance of conductor at 20 ℃ uohms/m

Maximum AC resistance of conductor at 90 ℃ uohms/m

Reactance at 50Hz
uohms/m

Impedance at 50Hz uohms/m

Maximum Capacitace PF/m

Maximum charging current at normal voltage and frequency mA/m

50

387

494

115

506

260

0.52

70

268

343

108

360

298

0.60

95

193

248

102

268

334

0.67

120

153

196

98.8

220

365

0.73

150

124

159

96.2

186

392

0.78

185

99.1

128

93.1

158

430

0.86

240

75.4

98

90.0

134

476

0.95

300

60.1

80

87.4

119

524

1.05

400

47.0

64

84.9

106

580

1.16

Cross-sectional area
mmsq

Current Ratings

Short circuit ratings

Laid direct in ground
Amps

Drawn into ducts
Amps

Laid in air
Amps

One second short circuit rating of conductor
KA

One second short circuit rating of copper per core
KA

50

210

180

220

6.8

Typically

less

then

1kA

70

255

215

270

9.8

95

300

255

330

13.3

120

340

290

375

17.2

150

380

330

430

21.2

185

430

370

490

26.6

240

490

425

570

34.9

300

540

470

650

43.8

400

590

520

700

57.3