Specifications and Current Capacity for SWA Cable 2 Core
The Table below displays the Technical Specifications and Current Carrying Capacity for SWA Cable 2 Core:-
|
Two 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) |
10.8 |
12.3 |
13.4 |
14.5 |
16.7 |
19.5 |
20.8 |
23.4 |
25.5 |
29.0 |
31.9 |
34.4 |
37.9 |
42.4 |
46.4 |
50.3 |
54.7 |
| Approx. Diameter Under Armour (mm) |
6.9 |
8.2 |
9.3 |
10.4 |
12.4 |
14.5 |
15.6 |
17.4 |
19.7 |
22.7 |
25.1 |
27 |
30.2 |
33.5 |
37.2 |
40.9 |
45.1 |
| Nominal Diameter of Armour Wires (mm) |
0.9 |
0.9 |
0.9 |
0.9 |
0.9 |
1.25 |
1.25 |
1.6 |
1.6 |
1.6 |
2.0 |
2.0 |
2.0 |
2.5 |
2.5 |
2.5 |
2.5 |
| Approx. Cable Weight (Kg, km) |
250 |
320 |
380 |
460 |
570 |
840 |
1060 |
1410 |
1730 |
2260 |
3030 |
3610 |
4330 |
5600 |
6940 |
8100 |
9940 |
| 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 |
| DC or Single Phase AC Clipped Direct
(Amps) |
27 |
36 |
49 |
62 |
85 |
110 |
146 |
180 |
219 |
279 |
338 |
392 |
451 |
515 |
607 |
698 |
787 |
| DC or Single Phase AC Free Air (Amps) |
29 |
39 |
52 |
66 |
90 |
115 |
152 |
188 |
228 |
291 |
354 |
410 |
472 |
539 |
636 |
732 |
847 |
| Volt Drop DC (mV/A/m) |
31 |
19 |
12 |
7.9 |
4.7 |
2.9 |
1.85 |
1.35 |
0.98 |
0.67 |
0.49 |
0.39 |
0.31 |
0.25 |
0.195 |
0.155 |
0.12 |
| Volt Drop Single Phase AC Touching (mV/A/m) | 31 | 19 | 12 | 7.9 | 4.7 | 2.9 | 1.9 | 1.35 | 1.0 | 0.69 | 0.52 | 0.42 | 0.35 | 0.29 | 0.24 | 0.21 | 0.19 |
The Maths behind 2 Core SWA cable volt drop
The following formula is used to calculate Voltage Drop in 2 core armoured cable = (mV/A/m) x Ib x L / 1000.
- (mV/A/m): To find the value for (mV/A/m) we need to look in the current carry capacity and voltage drop tables on the pages below.
- Ib: This is in AMPs, design current which is watts divided by voltage.
- L: length of the circuit in metres.
We divide it all by 1000 to convert the figure from Millivolts into Volts
You should have no less than 3% volt drop for a lighting circuit and no more that 5% for any other circuit, if you do you need to up the size cable and re-calculate until you are within the permissible volt drop %.
Please follow this link to our great selection of SWA Cable 2 Core
If you cannot find the required SWA Cable 2 Core, please feel free to call our Sales Team on 01244 288138 for further assistance and information.
SWACable.net is located on Zone 1 of Deeside Industrial Estate near Chester, if you’d prefer to pick up your 2 Core SWA Cable as opposed to having it delivered, please feel free to do so.
