CABLE RATING
|
Cable Cross sectional Area(mm2) |
Typical Current Rating (amps) | Recommended Circuit Breaker Rating (amps) |
| 1.5 mm2 | 7.9-15.9 A |
8 A |
|
2.5 mm2 |
15.9- 22 A | 15 A |
| 4 mm2 | 22 – 30 A |
20 A |
|
6 mm2 |
30 – 39 A | 30 A |
| 10 mm2 | 39 – 54 A |
40 A |
|
16 mm2 |
54 – 72 A | 60 A |
| 25 mm2 | 71 – 93 A |
80 A |
|
50 mm2 |
117 – 147 A | 125 A |
| 70 mm2 | 147 – 180 A |
150 A |
|
95 mm2 |
180 – 216 mm2 | 200 A |
| 120 mm2 | 216 – 250 A |
225 A |
|
150 mm2 |
250 – 287 A | 275 A |
| 185 mm2 | 287 – 334 A |
300 A |
|
240 mm2 |
334 – 400 A |
350 A |
Electrical Useful Formula
|
To Obtain |
Single phase |
Three phase |
| Kilowatts | V x I x PF/ 1000 | 1.732 x V x I x PF / 1000 |
| KVA | V x I / 1000 | 1.732 x V x I / 1000 |
| Horse power required when generator kW unknown | kW / 0.746 x Efficiency (Generator) | kW / 0.746 x Efficiency (Generator) |
| kW input when motor HP known | HP x 0.746 / Efficiency (Motor) | HP x 0.746 / Efficiency (Motor) |
| Amperes when motor HP is known | HP x 0.746 / V x PF x Efficiency | HP x 0.746 / V x PF x Efficiency |
| Amperes when kW is known | kW x 1000 / V x PF | kW x 1000 / V x PF |
| Amperes when kV-A is known | KV-A x 1000 / V | KV-A x 1000 / 1.732 x V |
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