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 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.
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