Maximum currents for copper wires
Maximum continuous thermal current Io in copper wire according to the Greek Electrical Installations Regulation. (paragraph 126)These values stand for 30oC ambient temperatures and 60oC Wire temperatures , and they can be corrected using the values in table 2.
Section mm2 | Cat I | Cat II | Cat III | |||
Imax | Ifuse | Imax | Ifuse | Imax | Ifuse | |
0,75 | 9 | 6 | 15 | 10 | 7 | 6 |
1 | 11 | 6 | 18 | 16 | 9 | 6 |
1,5 | 14 | 10 | 22 | 20 | 10 | 6 |
2,5 | 20 | 16 | 31 | 25 | 15 | 10 |
4 | 25 | 20 | 41 | 35 | 20 | 16 |
6 | 33 | 25 | 54 | 50 | 26 | 20 |
10 | 43 | 35 | 70 | 60 | 35 | 25 |
16 | 60 | 50 | 96 | 80 | 48 | 35 |
25 | 83 | 60 | 128 | 100 | 65 | 50 |
35 | 100 | 80 | 153 | 125 | 78 | 60 |
50 | 127 | 100 | 197 | 160 | 100 | 80 |
70 | 147 | 125 | 234 | 200 | - | - |
95 | 181 | 160 | 287 | 250 | - | - |
120 | 208 | 200 | 336 | 300 | - | - |
150 | 238 | 225 | 383 | 355 | - | - |
185 | 266 | 250 | 435 | 425 | - | - |
240 | - | - | 515 | 500 | - | - |
300 | - | - | 596 | 600 | - | - |
400 | - | - | 710 | 710 | - | - |
500 | - | - | 810 | 800 | - | - |
Table 2. (Temperature correction factors).
Amb. temp | 30 | 35 | 40 | 45 | 50 | 55 |
Factor | 1,00 | 0,91 | 0,82 | 0,71 | 0,58 | 0,41 |