Power Cables 

Power Cables

BS 6622 Single Core Unarmoured (Copper Wire Screened) 6.6kV XLPE Stranded Aiuminium Conductors

Construction

cross-sectional area mmsq

Minimum average thickness of insulation mm

Nominal diameter over insulation
mm

 

Nominal area of copperwire screen mmsq

Nominal average thickness of PVC oversheath
mm

Nominal overall diameter of cable mm

70

2.5

16.8

16.0

1.7

23.5

95

2.5

18.5

16.0

1.7

25.4

120

2.5

20.0

16.0

1.8

26.9

150

2.5

21.3

16.0

1.8

28.5

185

2.5

23.1

16.0

1.9

30.3

240

2.6

25.5

25.0

1.9

32.9

300

2.8

28.3

25.0

2.0

35.9

400

3.0

31.4

35.0

2.2

39.2

500

3.2

34.7

35.0

2.6

42.8

630

3.2

38.6

35.0

3.1

47.0

Installation

cross-sectional area mmsq

Approximate cable weight kg/m

Nominal drum length
m

Minimum bending radius mm

Nominal internal diameter of ducts mm

70

0.7

1000

400

100

95

0.8

1000

400

100

120

1.0

1000

450

100

150

1.1

500

450

100

185

1.3

500

500

100

240

1.5

500

500

100

300

1.7

500

550

100

400

2.2

500

600

100

500

2.6

500

650

100

630

3.1

300

750

100

Electrical Performance

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

70

443

568

111

580

371

0.45

95

320

410

109

424

417

0.50

120

253

325

105

342

459

0.55

150

206

265

103

284

494

0.59

185

164

211

99.5

233

543

0.65

240

125

161

96.6

188

583

0.70

300

100

130

94.7

161

602

0.72

400

77.8

102

92.5

138

627

0.75

500

60.5

81.0

90.7

122

654

0.79

630

46.9

64.0

87.6

109

737

0.87

Ratings

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

70

210

215

240

6.3

2.6

95

250

255

300

8.5

2.6

120

280

285

335

11.0

2.6

150

320

315

380

13.5

2.6

185

360

350

435

17.0

2.6

240

415

405

510

22.3

4.3

300

475

455

600

28.0

4.3

400

540

510

700

36.6

5.8

500

610

570

810

46.2

5.8

630

680

640

930

58.3

5.8