| Ambient temp | 25°C | 30°C | 35°C | 40°C | 45°C | 50°C | |--------------|------|------|------|------|------|------| | Factor | 1.07 | 1.00 | 0.94 | 0.87 | 0.79 | 0.71 |
| Installation Method | Ampacity (Amps) | |---------------------|------------------| | A1 – In insulated wall conduit | | | B2 – In conduit on wall | 18 A | | C – Clipped direct | 21 A | | F – Free air | 24 A | XLPE allows higher ampacity due to better thermal tolerance. 2. Correction Factors (Derating) Per IEC 60364-5-52, the base value must be multiplied by correction factors. Ambient Temperature Correction (Table B.52.14) For PVC (70°C conductor): iec 60364 current carrying capacity 1.5 mm2 copper
Introduction IEC 60364 (Low-voltage electrical installations) is the international standard for electrical design, particularly concerning safety, selection, and erection of wiring systems. A common design question is: How much current can a 1.5 mm² copper conductor safely carry? | Ambient temp | 25°C | 30°C |
For XLPE (90°C conductor):