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Technical Specifications and Current Capacity – SWA Cable 4 Core

The Table below displays the Technical Specifications and Current Carrying Capacity of 4 Core Armoured Cable:-

This cable is very often used for 3 phase circuits and power supplies, where the cores would be used for the following

  • Brown- L1
  • black – L2
  • Grey – L3
  • Blue – Neutral

An extra 6491X Earth cable is often pulled in parallel to give a good earth as not all installations can rely on the armouring for its earth.

How to size your 4 core SWA cable

Electrical engineers and electricians can use the below the formula to work the volt drop on 4 core armoured cable.

Voltage Drop = (mV/A/m) x Ib x L / 1000.

(mV/A/m): To find the value for (mV/A/m) use the above tables
Ib:  Design current in Amps which is watts divided by voltage
L:  length of the circuit in metres

Below is a Table of Technical Specifications and information such as the Current Carrying Capacity of SWA Cable 4 Core:-

 

Four Core Specifications

Nominal Cross Sectional Area (mm2)

1.5

2.5

4

6

10

16

25

35

50

70

95

120

150

185

240

300

400

Approx. Overall Diameter (mm)

12.0

13.7

15.0

17.3

19.8

22.3

27.6

30.6

32.7

38.0

41.3

46.4

50.5

55.3

61.1

66.7

75.3

Approx. Diameter Under Armour (mm)

8.1

9.6

10.9

12.3

14.6

17.1

21.6

24.1

26.4

30.6

34.1

37.6

41.6

46.0

51.6

56.8

63.6

Nominal Diameter of Armour Wires (mm)

0.9

0.9

0.9

1.25

1.25

1.25

1.6

1.6

1.6

2.0

2.0

2.5

2.5

2.5

2.5

2.5

3.15

Approx. Cable Weight (kg/km)

310

400

510

730

930

1260

1880

2330

2890

4120

5280

6790

8060

9770

12270

14900

19270

Maximum Conductor Resistance @ 20 Degrees C

12.1

7.41

4.61

3.08

1.83

1.15

0.727

0.524

0.387

0.268

0.193

0.153

0.124

0.0991

0.0754

0.0601

0.047

Conductor Short Circuit Rating (1 Sec/kA)

0.20

0.35

0.57

0.86

1.4

2.2

3.6

5.0

7.1

10.0

13.6

17.2

21.4

26.5

34.3

42.9

57.2

Three Phase AC Clipped Direct (Amps)

23

31

42

53

73

94

124

154

187

238

289

335

386

441

520

599

673

Three Phase AC Free Air (Amps)

25

33

44

56

78

99

131

162

197

251

304

353

406

463

546

628

728

Volt Drop Three Phase AC (mV/A/m)

27

16

10

6.8

4

2.5

1.65

1.15

0.87

0.60

0.45

0.37

0.30

0.26

0.21

0.185

0.165

Follow this quick link if you’d like to view our range of SWA Cable 4 Core,

We stock and supply a large range of SWA 4 Core cable, so if you cannot find the size or type you require, please feel free to call our Sales Team on 01244 288138 for further information and assistance.

Quickbit is located on Zone 1 of Deeside Industrial Estate near Chester, so if you’d prefer to arrange a pickup for SWA Cable 4 Core as opposed to having it delivered, please feel free to do so as all pickups are welcome.
SWA Cable 4 Core for the best prices online with fast, free delivery on orders over £100.