⚡ 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

300 Amp Cable Size at 600 Meters (48V DC (LiFePO4 Battery Bank / Telecom))

IEC 60364-5-52 metric conductor sizing (mm²), voltage drop, and power loss calculation for 300 A over 600 m (1968.5 ft).

Copper Cable (≤3% Drop)14× 400 mm²Drop: 1.38V (2.87%)
Aluminum Cable (≤3% Drop)400 mm²Drop: 31.77V (66.19%)
Voltage at Load46.6 VLine Loss: 412.7 W
Max Power & Breaker14.4 kW300A MCB/MCCB

IEC 60364 Cable Cross-Section Table (1.5 mm² – 400 mm²) for 300A at 600m

Cross-Section (mm²)Cu AmpacityAl Ampacity Cu Voltage DropLoad VoltageAl Voltage DropPower LossStatus
1.5 mm²16 A12 A5136.0 V (10700.0%)0.0 V8472.0 V (17650.0%)1540800.0 WDrop High
2.5 mm²24 A18 A3081.6 V (6420.0%)0.0 V5083.2 V (10590.0%)924480.0 WDrop High
4 mm²32 A25 A1926.0 V (4012.5%)0.0 V3177.0 V (6618.75%)577800.0 WDrop High
6 mm²41 A32 A1284.0 V (2675.0%)0.0 V2118.0 V (4412.5%)385200.0 WDrop High
10 mm²57 A44 A770.4 V (1605.0%)0.0 V1270.8 V (2647.5%)231120.0 WDrop High
16 mm²76 A59 A481.5 V (1003.12%)0.0 V794.25 V (1654.69%)144450.0 WDrop High
25 mm²101 A78 A308.16 V (642.0%)0.0 V508.32 V (1059.0%)92448.0 WDrop High
35 mm²125 A97 A220.11 V (458.57%)0.0 V363.09 V (756.43%)66034.3 WDrop High
50 mm²151 A118 A154.08 V (321.0%)0.0 V254.16 V (529.5%)46224.0 WDrop High
70 mm²192 A150 A110.06 V (229.29%)0.0 V181.54 V (378.21%)33017.1 WDrop High
95 mm²232 A181 A81.09 V (168.95%)0.0 V133.77 V (278.68%)24328.4 WDrop High
120 mm²269 A210 A64.2 V (133.75%)0.0 V105.9 V (220.62%)19260.0 WDrop High
150 mm²309 A241 A51.36 V (107.0%)0.0 V84.72 V (176.5%)15408.0 WDrop High
185 mm²353 A275 A41.64 V (86.76%)6.4 V68.69 V (143.11%)12493.0 WDrop High
240 mm²415 A324 A32.1 V (66.88%)15.9 V52.95 V (110.31%)9630.0 WDrop High
300 mm²477 A372 A25.68 V (53.5%)22.3 V42.36 V (88.25%)7704.0 WDrop High
400 mm²570 A445 A19.26 V (40.12%)28.7 V31.77 V (66.19%)5778.0 WDrop High

FAQ — 300 Amp Cable Size at 600 Meters (48V DC (LiFePO4 Battery Bank / Telecom))

What mm² cable size is required for 300A at 600 meters (48V)?

According to IEC 60364-5-52 ampacity and the 3% maximum voltage drop standard, you need 14× 400 mm² copper cable for 300A over 600m at 48V (voltage drop: 1.38V or 2.87%).

What is the power capacity of 300A at 48V?

At unity power factor, 300A at 48V supports 14.4 kW with a standard 300A circuit breaker.