800 Amp Cable Size at 40 Meters (415V Three-Phase (UK / Australia Industrial))
IEC 60364-5-52 metric conductor sizing (mm²), voltage drop, and power loss calculation for 800 A over 40 m (131.2 ft).
Copper Cable (≤3% Drop)2× 400 mm²Drop: 1.49V (0.35%)
Aluminum Cable (≤3% Drop)400 mm²Drop: 4.89V (1.18%)
Voltage at Load413.5 VLine Loss: 2054.4 W
Max Power & Breaker575.04 kW800A MCB/MCCB
IEC 60364 Cable Cross-Section Table (1.5 mm² – 400 mm²) for 800A at 40m
| Cross-Section (mm²) | Cu Ampacity | Al Ampacity | Cu Voltage Drop | Load Voltage | Al Voltage Drop | Power Loss | Status |
|---|---|---|---|---|---|---|---|
| 1.5 mm² | 16 A | 12 A | 790.74 V (190.54%) | 0.0 V | 1304.35 V (314.3%) | 1095680.0 W | Drop High |
| 2.5 mm² | 24 A | 18 A | 474.44 V (114.32%) | 0.0 V | 782.61 V (188.58%) | 657408.0 W | Drop High |
| 4 mm² | 32 A | 25 A | 296.53 V (71.45%) | 118.5 V | 489.13 V (117.86%) | 410880.0 W | Drop High |
| 6 mm² | 41 A | 32 A | 197.68 V (47.63%) | 217.3 V | 326.09 V (78.58%) | 273920.0 W | Drop High |
| 10 mm² | 57 A | 44 A | 118.61 V (28.58%) | 296.4 V | 195.65 V (47.15%) | 164352.0 W | Drop High |
| 16 mm² | 76 A | 59 A | 74.13 V (17.86%) | 340.9 V | 122.28 V (29.47%) | 102720.0 W | Drop High |
| 25 mm² | 101 A | 78 A | 47.44 V (11.43%) | 367.6 V | 78.26 V (18.86%) | 65740.8 W | Drop High |
| 35 mm² | 125 A | 97 A | 33.89 V (8.17%) | 381.1 V | 55.9 V (13.47%) | 46957.7 W | Drop High |
| 50 mm² | 151 A | 118 A | 23.72 V (5.72%) | 391.3 V | 39.13 V (9.43%) | 32870.4 W | Drop High |
| 70 mm² | 192 A | 150 A | 16.94 V (4.08%) | 398.1 V | 27.95 V (6.74%) | 23478.9 W | Drop High |
| 95 mm² | 232 A | 181 A | 12.49 V (3.01%) | 402.5 V | 20.59 V (4.96%) | 17300.2 W | Drop High |
| 120 mm² | 269 A | 210 A | 9.88 V (2.38%) | 405.1 V | 16.3 V (3.93%) | 13696.0 W | Drop High |
| 150 mm² | 309 A | 241 A | 7.91 V (1.91%) | 407.1 V | 13.04 V (3.14%) | 10956.8 W | Drop High |
| 185 mm² | 353 A | 275 A | 6.41 V (1.54%) | 408.6 V | 10.58 V (2.55%) | 8883.9 W | Drop High |
| 240 mm² | 415 A | 324 A | 4.94 V (1.19%) | 410.1 V | 8.15 V (1.96%) | 6848.0 W | Drop High |
| 300 mm² | 477 A | 372 A | 3.95 V (0.95%) | 411.0 V | 6.52 V (1.57%) | 5478.4 W | Drop High |
| 400 mm² | 570 A | 445 A | 2.97 V (0.71%) | 412.0 V | 4.89 V (1.18%) | 4108.8 W | Drop High |
FAQ — 800 Amp Cable Size at 40 Meters (415V Three-Phase (UK / Australia Industrial))
What mm² cable size is required for 800A at 40 meters (415V)?
According to IEC 60364-5-52 ampacity and the 3% maximum voltage drop standard, you need 2× 400 mm² copper cable for 800A over 40m at 415V (voltage drop: 1.49V or 0.35%).
What is the power capacity of 800A at 415V?
At unity power factor, 800A at 415V supports 575.04 kW with a standard 800A circuit breaker.
Related Lengths & Currents (415V)
800A · 5m (415V)800A · 10m (415V)800A · 15m (415V)800A · 20m (415V)800A · 25m (415V)800A · 30m (415V)800A · 35m (415V)800A · 45m (415V)800A · 50m (415V)800A · 60m (415V)800A · 70m (415V)10A · 40m (415V)16A · 40m (415V)20A · 40m (415V)25A · 40m (415V)32A · 40m (415V)40A · 40m (415V)50A · 40m (415V)63A · 40m (415V)80A · 40m (415V)100A · 40m (415V)125A · 40m (415V)160A · 40m (415V)200A · 40m (415V)