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

4.5

19.4

1.5

56/2.5

2.8

58.8

70

4.5

21.2

1.5

60/2.5

2.9

62.9

95

4.5

22.9

1.6

65/2.5

3.0

67.0

120

4.5

24.4

1.7

68/2.5

3.1

70.6

150

4.5

25.7

1.7

71/2.5

3.2

73.6

185

4.5

27.5

1.8

61/3.15

3.4

79.4

240

4.5

29.7

1.9

65/3.15

3.6

84.7

300

4.5

32.0

2.0

70/3.15

3.7

90.1

400

4.5

34.7

2.1

75/3.15

4.0

96.7

Cross-sectional area mmsq

Approximate cable weight kg/m

Nominal drum length
m

Minimum bending radius mm

Nominal internal diameter of ducts mm

50

6.1

500

900

100

70

7.1

500

950

100

95

8.3

500

1050

125

120

9.4

500

1100

125

150

10.5

450

1150

125

185

12.9

400

1200

125

240

15.2

350

1300

125

300

17.6

300

1400

125

400

20.8

250

1500

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

123

508

211

0.58

70

268

343

115

361

240

0.65

95

193

248

109

270

267

0.73

120

153

196

105

223

291

0.79

150

124

159

102

189

312

0.85

185

99.1

128

98.6

162

340

0.93

240

75.4

98

95.2

137

375

1.02

300

60.1

80

92.2

123

411

1.12

400

47

64

89.3

110

454

1.24

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