⚡ IEC 60364-5-52 · DIN VDE · NEK 400 · SS 436 40 00

Kabeltværsnit for 20 Ampere ved 5 Meter (400V)

Beregning af kabeltværsnit (mm²), spændingsfald og sikringsstørrelse efter dansk standard DS/HD 60364 for 20 A over 5 m ved 400V.

Copper Cable (≤3% Drop)2.5 mm²Drop: 1.48V (0.37%)

Aluminum Cable (≤3% Drop)4 mm²Drop: 1.53V (0.38%)

Voltage at Load398.5 VLine Loss: 51.4 W

Max Power & Breaker13.86 kW20A MCB/MCCB

IEC 60364 Cable Cross-Section Table (1.5 mm² – 400 mm²) for 20A at 5m

Cross-Section (mm²)	Cu Ampacity	Al Ampacity	Cu Voltage Drop	Load Voltage	Al Voltage Drop	Power Loss	Status
1.5 mm²	16 A	12 A	2.47 V (0.62%)	397.5 V	4.08 V (1.02%)	85.6 W	Drop High
2.5 mm²	24 A	18 A	1.48 V (0.37%)	398.5 V	2.45 V (0.61%)	51.4 W	✓ OK (≤3%)
4 mm²	32 A	25 A	0.93 V (0.23%)	399.1 V	1.53 V (0.38%)	32.1 W	✓ OK (≤3%)
6 mm²	41 A	32 A	0.62 V (0.15%)	399.4 V	1.02 V (0.25%)	21.4 W	✓ OK (≤3%)
10 mm²	57 A	44 A	0.37 V (0.09%)	399.6 V	0.61 V (0.15%)	12.8 W	✓ OK (≤3%)
16 mm²	76 A	59 A	0.23 V (0.06%)	399.8 V	0.38 V (0.1%)	8.0 W	✓ OK (≤3%)
25 mm²	101 A	78 A	0.15 V (0.04%)	399.9 V	0.24 V (0.06%)	5.1 W	✓ OK (≤3%)
35 mm²	125 A	97 A	0.11 V (0.03%)	399.9 V	0.17 V (0.04%)	3.7 W	✓ OK (≤3%)
50 mm²	151 A	118 A	0.07 V (0.02%)	399.9 V	0.12 V (0.03%)	2.6 W	✓ OK (≤3%)
70 mm²	192 A	150 A	0.05 V (0.01%)	399.9 V	0.09 V (0.02%)	1.8 W	✓ OK (≤3%)
95 mm²	232 A	181 A	0.04 V (0.01%)	400.0 V	0.06 V (0.02%)	1.4 W	✓ OK (≤3%)
120 mm²	269 A	210 A	0.03 V (0.01%)	400.0 V	0.05 V (0.01%)	1.1 W	✓ OK (≤3%)
150 mm²	309 A	241 A	0.02 V (0.01%)	400.0 V	0.04 V (0.01%)	0.9 W	✓ OK (≤3%)
185 mm²	353 A	275 A	0.02 V (0.01%)	400.0 V	0.03 V (0.01%)	0.7 W	✓ OK (≤3%)
240 mm²	415 A	324 A	0.02 V (0.0%)	400.0 V	0.03 V (0.01%)	0.5 W	✓ OK (≤3%)
300 mm²	477 A	372 A	0.01 V (0.0%)	400.0 V	0.02 V (0.01%)	0.4 W	✓ OK (≤3%)
400 mm²	570 A	445 A	0.01 V (0.0%)	400.0 V	0.02 V (0.0%)	0.3 W	✓ OK (≤3%)

Til 20 Ampere over 5 meter ved 400V anbefales 2.5 mm² kobberkabel (spændingsfald 1.48V / 0.37%).

Det svarer til 13.86 kW med en anbefalet sikring på 20A.