INSTRUCTION OF CHOOSING
LOW VOLTAGE WIRES & CABLES
I.2.3/ Cable run in single way ducts
Current ratings and Voltage drop for Copper conductors, XLPE insulated, armoured, PVC oversheathed cables, Run in single way ducts
Table 6
Tiết diện ruột dẫn
Nom. area of cond. |
Cáp 1 lõi , giáp sợi nhôm
(Single core cable, Aluminium wire armoured ) |
Cáp nhiều lõi, giáp sợi thép
( Multicore cable, Steel wire armoured ) |
2 cáp : ống đặt tiếp xúc
Two cables: ducts touching
|
3 cáp : ống đặt tiếp xúc theo hình 3 lá
Three cables : ducts touching, trefoil
|
Cáp 2 lõi
Two core cable
|
Cáp 3 hay 4 lõi
Three or four core Cable
|
Dòng điện định mức
Current ratings |
Độ sụt áp
Approximate volt drop per amp per metre |
Dòng điện định mức
Current ratings |
Độ sụt áp
Approximate volt drop per amp per metre |
Dòng điện định mức
Current ratings |
Độ sụt áp
Approximate volt drop per amp per metre |
Dòng điện định mức
Current ratings |
Độ sụt áp
Approximate volt drop per amp per metre |
|
mm2 |
A |
mV |
A |
mV |
A |
mV |
A |
mV |
| 16 |
140 |
3.0 |
130 |
2.70 |
115 |
2.90 |
94 |
2.60 |
| 25 |
180 |
2.0 |
170 |
1.80 |
145 |
1.90 |
125 |
1.60 |
| 35 |
215 |
1.4 |
205 |
1.25 |
175 |
1.30 |
150 |
1.20 |
| 50 |
255 |
1.10 |
235 |
0.93 |
210 |
1.00 |
175 |
0.87 |
| 70 |
310 |
0.80 |
280 |
0.70 |
260 |
0.70 |
215 |
0.61 |
| 95 |
365 |
0.65 |
330 |
0.56 |
310 |
0.52 |
260 |
0.45 |
| 120 |
410 |
0.55 |
370 |
0.48 |
355 |
0.42 |
300 |
0.36 |
| 150 |
445 |
0.50 |
405 |
0.43 |
400 |
0.35 |
335 |
0.30 |
| 185 |
485 |
0.45 |
440 |
0.39 |
455 |
0.29 |
380 |
0.25 |
| 240 |
550 |
0.40 |
500 |
0.35 |
520 |
0.24 |
440 |
0.21 |
| 300 |
610 |
0.37 |
550 |
0.32 |
590 |
0.21 |
495 |
0.19 |
| 400 |
640 |
0.35 |
580 |
0.30 |
- |
- |
- |
- |
| 500 |
690 |
0.33 |
620 |
0.28 |
- |
- |
- |
- |
| 630 |
750 |
0.30 |
670 |
0.26 |
- |
- |
- |
- |
| 800 |
828 |
0.28 |
735 |
0.24 |
- |
- |
- |
- |
| 1000 |
919 |
0.26 |
811 |
0.22 |
- |
- |
- |
- |
Basic assumptions and conditions of installation
Soil thermal resistivity 1.2 0C m/W
Ground temperature 15 0C
Ambient air temperature 25 0C
Dep th of lay ing 0. 5 metre
Maximum operating conductor temperature at rated current: 900C.
II/ SERVICE ENTRANCE CABLE :
II.1/ PVC Insulation :
Current ratings and Voltage drop for Copper conductors, PVC insulated, PVC sheathed Service entrance cables
The same as Table 1 , column 2,3,4 cores
II.2/ XLPE INSULATION:
Current ratings and Voltage drop for Copper conductors, PVC insulated, PVCor HDPE sheathed Service entrance cables
The same as Table 4 , column F,G
