Current carrying capacity for power and signal cables
The current carrying capacity of PVC/PUR-insulated copper cables is specified for installation type C under continuous operating conditions in the table with reference to an ambient air temperature of 40 °C (104 °F). For other ambient temperatures, the values must be corrected using the derating factors in the corresponding table.
|
Current carrying capacity of cables with copper cores according to EN 60204-1 rms AC 50/60 Hz or DC in A for installation type C |
|
|---|---|
|
Cross-section |
Current |
|
Electronics (one control circuit pair) |
|
|
0.20 |
4.4 |
|
0.50 |
7.5 |
|
0.75 |
9.5 |
|
Power (one symmetrically loaded AC cable) |
|
|
0.75 |
9.8 |
|
1.00 |
11.7 |
|
1.50 |
15.2 |
|
2.50 |
21 |
|
4 |
28 |
|
6 |
36 |
Derating factors for power and signal cables
|
Ambient air temperature |
Derating factor |
|---|---|
|
30 (86) |
1.15 |
|
35 (95) |
1.08 |
|
40 (104) |
1.00 |
|
45 (113) |
0.91 |
|
50 (122) |
0.82 |
|
55 (131) |
0.71 |
|
60 (140) |
0.58 |