⚡ 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

225 Amp Cable Size at 200 Meters (24V DC (Off-Grid Solar / Industrial Control))

IEC 60364-5-52 metric conductor sizing (mm²), voltage drop, and power loss calculation for 225 A over 200 m (656.2 ft).

Copper Cable (≤3% Drop)7× 400 mm²Drop: 0.69V (2.87%)
Aluminum Cable (≤3% Drop)400 mm²Drop: 7.94V (33.09%)
Voltage at Load23.3 VLine Loss: 154.8 W
Max Power & Breaker5.4 kW225A MCB/MCCB

IEC 60364 Cable Cross-Section Table (1.5 mm² – 400 mm²) for 225A at 200m

Cross-Section (mm²)Cu AmpacityAl Ampacity Cu Voltage DropLoad VoltageAl Voltage DropPower LossStatus
1.5 mm²16 A12 A1284.0 V (5350.0%)0.0 V2118.0 V (8825.0%)288900.0 WDrop High
2.5 mm²24 A18 A770.4 V (3210.0%)0.0 V1270.8 V (5295.0%)173340.0 WDrop High
4 mm²32 A25 A481.5 V (2006.25%)0.0 V794.25 V (3309.38%)108337.5 WDrop High
6 mm²41 A32 A321.0 V (1337.5%)0.0 V529.5 V (2206.25%)72225.0 WDrop High
10 mm²57 A44 A192.6 V (802.5%)0.0 V317.7 V (1323.75%)43335.0 WDrop High
16 mm²76 A59 A120.37 V (501.56%)0.0 V198.56 V (827.34%)27084.4 WDrop High
25 mm²101 A78 A77.04 V (321.0%)0.0 V127.08 V (529.5%)17334.0 WDrop High
35 mm²125 A97 A55.03 V (229.29%)0.0 V90.77 V (378.21%)12381.4 WDrop High
50 mm²151 A118 A38.52 V (160.5%)0.0 V63.54 V (264.75%)8667.0 WDrop High
70 mm²192 A150 A27.51 V (114.64%)0.0 V45.39 V (189.11%)6190.7 WDrop High
95 mm²232 A181 A20.27 V (84.47%)3.7 V33.44 V (139.34%)4561.6 WDrop High
120 mm²269 A210 A16.05 V (66.87%)8.0 V26.47 V (110.31%)3611.2 WDrop High
150 mm²309 A241 A12.84 V (53.5%)11.2 V21.18 V (88.25%)2889.0 WDrop High
185 mm²353 A275 A10.41 V (43.38%)13.6 V17.17 V (71.55%)2342.4 WDrop High
240 mm²415 A324 A8.02 V (33.44%)16.0 V13.24 V (55.16%)1805.6 WDrop High
300 mm²477 A372 A6.42 V (26.75%)17.6 V10.59 V (44.12%)1444.5 WDrop High
400 mm²570 A445 A4.81 V (20.06%)19.2 V7.94 V (33.09%)1083.4 WDrop High

FAQ — 225 Amp Cable Size at 200 Meters (24V DC (Off-Grid Solar / Industrial Control))

What mm² cable size is required for 225A at 200 meters (24V)?

According to IEC 60364-5-52 ampacity and the 3% maximum voltage drop standard, you need 7× 400 mm² copper cable for 225A over 200m at 24V (voltage drop: 0.69V or 2.87%).

What is the power capacity of 225A at 24V?

At unity power factor, 225A at 24V supports 5.4 kW with a standard 225A circuit breaker.