⚡ 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

425 Amp Cable Size at 60 Meters (24V DC (Off-Grid Solar / Industrial Control))

IEC 60364-5-52 metric conductor sizing (mm²), voltage drop, and power loss calculation for 425 A over 60 m (196.9 ft).

Copper Cable (≤3% Drop)4× 400 mm²Drop: 0.68V (2.84%)
Aluminum Cable (≤3% Drop)400 mm²Drop: 4.5V (18.75%)
Voltage at Load23.3 VLine Loss: 289.9 W
Max Power & Breaker10.2 kW450A MCB/MCCB

IEC 60364 Cable Cross-Section Table (1.5 mm² – 400 mm²) for 425A at 60m

Cross-Section (mm²)Cu AmpacityAl Ampacity Cu Voltage DropLoad VoltageAl Voltage DropPower LossStatus
1.5 mm²16 A12 A727.6 V (3031.67%)0.0 V1200.2 V (5000.83%)309230.0 WDrop High
2.5 mm²24 A18 A436.56 V (1819.0%)0.0 V720.12 V (3000.5%)185538.0 WDrop High
4 mm²32 A25 A272.85 V (1136.88%)0.0 V450.07 V (1875.31%)115961.2 WDrop High
6 mm²41 A32 A181.9 V (757.92%)0.0 V300.05 V (1250.21%)77307.5 WDrop High
10 mm²57 A44 A109.14 V (454.75%)0.0 V180.03 V (750.12%)46384.5 WDrop High
16 mm²76 A59 A68.21 V (284.22%)0.0 V112.52 V (468.83%)28990.3 WDrop High
25 mm²101 A78 A43.66 V (181.9%)0.0 V72.01 V (300.05%)18553.8 WDrop High
35 mm²125 A97 A31.18 V (129.93%)0.0 V51.44 V (214.32%)13252.7 WDrop High
50 mm²151 A118 A21.83 V (90.95%)2.2 V36.01 V (150.02%)9276.9 WDrop High
70 mm²192 A150 A15.59 V (64.96%)8.4 V25.72 V (107.16%)6626.4 WDrop High
95 mm²232 A181 A11.49 V (47.87%)12.5 V18.95 V (78.96%)4882.6 WDrop High
120 mm²269 A210 A9.09 V (37.9%)14.9 V15.0 V (62.51%)3865.4 WDrop High
150 mm²309 A241 A7.28 V (30.32%)16.7 V12.0 V (50.01%)3092.3 WDrop High
185 mm²353 A275 A5.9 V (24.58%)18.1 V9.73 V (40.55%)2507.3 WDrop High
240 mm²415 A324 A4.55 V (18.95%)19.5 V7.5 V (31.26%)1932.7 WDrop High
300 mm²477 A372 A3.64 V (15.16%)20.4 V6.0 V (25.0%)1546.2 WDrop High
400 mm²570 A445 A2.73 V (11.37%)21.3 V4.5 V (18.75%)1159.6 WDrop High

FAQ — 425 Amp Cable Size at 60 Meters (24V DC (Off-Grid Solar / Industrial Control))

What mm² cable size is required for 425A at 60 meters (24V)?

According to IEC 60364-5-52 ampacity and the 3% maximum voltage drop standard, you need 4× 400 mm² copper cable for 425A over 60m at 24V (voltage drop: 0.68V or 2.84%).

What is the power capacity of 425A at 24V?

At unity power factor, 425A at 24V supports 10.2 kW with a standard 450A circuit breaker.