Oman Low-Voltage-Power-and-Control-Cables

Current rating of Cables: Current rating of Cables given below are based on IEC 60287 calculation and these values can be followed for the cables as per BS/IEC standard.

TABLE - 41

CURRENT RATINGS & VOLTAGE DROP OF THE CABLES - 600/1000 V Single Core Copper, XLPE insulated Armoured/Unarmoured Cables.

In Air

In Ground

I n Duct

"Approx Voltage drop of 3 Single core cables (3 Phase System)

Area

Single Core in Trefoil

Single Core in Trefoil

Single Core in Trefoil

Unarmoured Armoured

Armoured

Armoured

Trefoil

mm²

A

A

A

A

V/A/km

1.5

22

--

--

--

26.73

2.5

30

--

--

--

16.37

4

39

--

--

--

10.19

6

49

--

--

--

6.81

10

67

67

82

78

4.04

16

92

92

108

101

2.56

25

123

123

139

134

1.62

35

146

146

165

154

1.18

50

174

180

199

199

0.878

70

222

230

244

239

0.620

95

275

282

292

281

0.463

120

321

328

332

315

0.379

150

371

377

371

341

0.326

185

430

433

417

376

0.276

240

513

510

480

421

0.235

300

594

581

536

459

0.212

400

692

664

594

488

0.192

500

801

751

658

529

0.179

630

925

846

723

571

0.168

800

1051

919

764

595

0.162

1000

1172

997

810

632

0.157

Operating Conditions Ambient air temp.

50 °C 35 °C

Ground temp. Depth of Laying

0.50 m

Thermal resistivity of Soil

1.2 K.m/W

34 MKK XXS002-02/01-12-2014

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