⚡ 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

650 Amp Cable Size at 90 Meters (400V Three-Phase (IEC European Grid))

IEC 60364-5-52 metric conductor sizing (mm²), voltage drop, and power loss calculation for 650 A over 90 m (295.3 ft).

Copper Cable (≤3% Drop)2× 400 mm²Drop: 2.71V (0.68%)
Aluminum Cable (≤3% Drop)400 mm²Drop: 8.94V (2.24%)
Voltage at Load397.3 VLine Loss: 3051.5 W
Max Power & Breaker450.33 kW700A MCB/MCCB

IEC 60364 Cable Cross-Section Table (1.5 mm² – 400 mm²) for 650A at 90m

Cross-Section (mm²)Cu AmpacityAl Ampacity Cu Voltage DropLoad VoltageAl Voltage DropPower LossStatus
1.5 mm²16 A12 A1445.57 V (361.39%)0.0 V2384.51 V (596.13%)1627470.0 WDrop High
2.5 mm²24 A18 A867.34 V (216.84%)0.0 V1430.71 V (357.68%)976482.0 WDrop High
4 mm²32 A25 A542.09 V (135.52%)0.0 V894.19 V (223.55%)610301.2 WDrop High
6 mm²41 A32 A361.39 V (90.35%)38.6 V596.13 V (149.03%)406867.5 WDrop High
10 mm²57 A44 A216.84 V (54.21%)183.2 V357.68 V (89.42%)244120.5 WDrop High
16 mm²76 A59 A135.52 V (33.88%)264.5 V223.55 V (55.89%)152575.3 WDrop High
25 mm²101 A78 A86.73 V (21.68%)313.3 V143.07 V (35.77%)97648.2 WDrop High
35 mm²125 A97 A61.95 V (15.49%)338.0 V102.19 V (25.55%)69748.7 WDrop High
50 mm²151 A118 A43.37 V (10.84%)356.6 V71.54 V (17.88%)48824.1 WDrop High
70 mm²192 A150 A30.98 V (7.74%)369.0 V51.1 V (12.77%)34874.4 WDrop High
95 mm²232 A181 A22.82 V (5.71%)377.2 V37.65 V (9.41%)25696.9 WDrop High
120 mm²269 A210 A18.07 V (4.52%)381.9 V29.81 V (7.45%)20343.4 WDrop High
150 mm²309 A241 A14.46 V (3.61%)385.5 V23.85 V (5.96%)16274.7 WDrop High
185 mm²353 A275 A11.72 V (2.93%)388.3 V19.33 V (4.83%)13195.7 WDrop High
240 mm²415 A324 A9.03 V (2.26%)391.0 V14.9 V (3.73%)10171.7 WDrop High
300 mm²477 A372 A7.23 V (1.81%)392.8 V11.92 V (2.98%)8137.3 WDrop High
400 mm²570 A445 A5.42 V (1.36%)394.6 V8.94 V (2.24%)6103.0 WDrop High

FAQ — 650 Amp Cable Size at 90 Meters (400V Three-Phase (IEC European Grid))

What mm² cable size is required for 650A at 90 meters (400V)?

According to IEC 60364-5-52 ampacity and the 3% maximum voltage drop standard, you need 2× 400 mm² copper cable for 650A over 90m at 400V (voltage drop: 2.71V or 0.68%).

What is the power capacity of 650A at 400V?

At unity power factor, 650A at 400V supports 450.33 kW with a standard 700A circuit breaker.