⚡ Cu ρ (75°C): 0.0214 Ω·mm²/m 🔌 NEC / IEC Standards: NFPA 70 & IEC 60364 🇺🇸 US Grid Avg: $0.175/kWh 🇩🇪 DE Grid Avg: €0.345/kWh 🇸🇪 SE Elpris: 1.54 SEK/kWh 🇳🇴 NO Strøm: 1.17 NOK/kWh 🔩 Copper Ref: $9,650/t (2026-10-24)
⚡ IEC 60364-5-52 · DIN VDE · NEK 400 · SS 436 40 00

550 Amp Cable Size at 150 Meters (400V Three-Phase (IEC European Grid))

IEC 60364-5-52 metric conductor sizing (mm²), voltage drop, and power loss calculation for 550 A over 150 m (492.1 ft).

Copper Cable (≤3% Drop)400 mm²Drop: 7.64V (1.91%)
Aluminum Cable (≤3% Drop)400 mm²Drop: 12.61V (3.15%)
Voltage at Load392.4 VLine Loss: 7282.7 W
Max Power & Breaker381.05 kW600A MCB/MCCB

IEC 60364 Cable Cross-Section Table (1.5 mm² – 400 mm²) for 550A at 150m

Cross-Section (mm²)Cu AmpacityAl Ampacity Cu Voltage DropLoad VoltageAl Voltage DropPower LossStatus
1.5 mm²16 A12 A2038.62 V (509.66%)0.0 V3362.78 V (840.69%)1942050.0 WDrop High
2.5 mm²24 A18 A1223.17 V (305.79%)0.0 V2017.67 V (504.42%)1165230.0 WDrop High
4 mm²32 A25 A764.48 V (191.12%)0.0 V1261.04 V (315.26%)728268.8 WDrop High
6 mm²41 A32 A509.66 V (127.41%)0.0 V840.69 V (210.17%)485512.5 WDrop High
10 mm²57 A44 A305.79 V (76.45%)94.2 V504.42 V (126.1%)291307.5 WDrop High
16 mm²76 A59 A191.12 V (47.78%)208.9 V315.26 V (78.82%)182067.2 WDrop High
25 mm²101 A78 A122.32 V (30.58%)277.7 V201.77 V (50.44%)116523.0 WDrop High
35 mm²125 A97 A87.37 V (21.84%)312.6 V144.12 V (36.03%)83230.7 WDrop High
50 mm²151 A118 A61.16 V (15.29%)338.8 V100.88 V (25.22%)58261.5 WDrop High
70 mm²192 A150 A43.68 V (10.92%)356.3 V72.06 V (18.01%)41615.4 WDrop High
95 mm²232 A181 A32.19 V (8.05%)367.8 V53.1 V (13.27%)30663.9 WDrop High
120 mm²269 A210 A25.48 V (6.37%)374.5 V42.03 V (10.51%)24275.6 WDrop High
150 mm²309 A241 A20.39 V (5.1%)379.6 V33.63 V (8.41%)19420.5 WDrop High
185 mm²353 A275 A16.53 V (4.13%)383.5 V27.27 V (6.82%)15746.4 WDrop High
240 mm²415 A324 A12.74 V (3.19%)387.3 V21.02 V (5.25%)12137.8 WDrop High
300 mm²477 A372 A10.19 V (2.55%)389.8 V16.81 V (4.2%)9710.2 WDrop High
400 mm²570 A445 A7.64 V (1.91%)392.4 V12.61 V (3.15%)7282.7 W✓ OK (≤3%)

FAQ — 550 Amp Cable Size at 150 Meters (400V Three-Phase (IEC European Grid))

What mm² cable size is required for 550A at 150 meters (400V)?

According to IEC 60364-5-52 ampacity and the 3% maximum voltage drop standard, you need 400 mm² copper cable for 550A over 150m at 400V (voltage drop: 7.64V or 1.91%).

What is the power capacity of 550A at 400V?

At unity power factor, 550A at 400V supports 381.05 kW with a standard 600A circuit breaker.