(COPPER CONDUCTORS) BS 5467, BS6724 and BS7846
CURRENT CARRYING CAPACITY (Amperes):
|
|
Current
carrying capacity (amperes) |
|
|
Copper
conductors |
For
Direct Burial |
|
|
Size
( mm2) |
Single
Phase 2-core cable ac or dc |
3-phase
3-core or 4-core cable ac |
|
16 |
125 |
106 |
|
25 |
163 |
135 |
|
35 |
195 |
162 |
|
50 |
231 |
193 |
|
70 |
282 |
237 |
|
95 |
339 |
284 |
|
120 |
385 |
323 |
|
150 |
432 |
361 |
|
185 |
487 |
408 |
|
240 |
562 |
471 |
|
300 |
630 |
527 |
|
400 |
711 |
594 |
|
NOTE: |
a. The
above current carrying capacities are for reference only, the current
carrying capacities may be varied for different installation conditions |
|
|
b. Ambient
ground temperature is assumed at 30oC, Conductor operating
temperature at 90oC |
|
|
c. For
direct burial, the assumption on burial depth was 0.5m. |
|
|
d. Soil
thermal resistivity is assumed 1.2 Km/W |