Maryland Metrics: Maximum currents for copper wires

Maryland Metrics: Technical Bulletin
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 30^oC ambient temperatures and 60^oC Wire temperatures , and they can be corrected using the values in table 2.

Section mm² Cat I Cat II Cat III

I_max I_fuse I_max I_fuse I_max I_fuse

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

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