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

Kabeltværsnit for 20 Ampere ved 15 Meter (400V)

Beregning af kabeltværsnit (mm²), spændingsfald og sikringsstørrelse efter dansk standard DS/HD 60364 for 20 A over 15 m ved 400V.

Copper Cable (≤3% Drop)2.5 mm²Drop: 4.45V (1.11%)

Aluminum Cable (≤3% Drop)4 mm²Drop: 4.59V (1.15%)

Voltage at Load395.6 VLine Loss: 154.1 W

Max Power & Breaker13.86 kW20A MCB/MCCB

IEC 60364 Cable Cross-Section Table (1.5 mm² – 400 mm²) for 20A at 15m

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	7.41 V (1.85%)	392.6 V	12.23 V (3.06%)	256.8 W	Drop High
2.5 mm²	24 A	18 A	4.45 V (1.11%)	395.6 V	7.34 V (1.83%)	154.1 W	✓ OK (≤3%)
4 mm²	32 A	25 A	2.78 V (0.69%)	397.2 V	4.59 V (1.15%)	96.3 W	✓ OK (≤3%)
6 mm²	41 A	32 A	1.85 V (0.46%)	398.1 V	3.06 V (0.76%)	64.2 W	✓ OK (≤3%)
10 mm²	57 A	44 A	1.11 V (0.28%)	398.9 V	1.83 V (0.46%)	38.5 W	✓ OK (≤3%)
16 mm²	76 A	59 A	0.69 V (0.17%)	399.3 V	1.15 V (0.29%)	24.1 W	✓ OK (≤3%)
25 mm²	101 A	78 A	0.44 V (0.11%)	399.6 V	0.73 V (0.18%)	15.4 W	✓ OK (≤3%)
35 mm²	125 A	97 A	0.32 V (0.08%)	399.7 V	0.52 V (0.13%)	11.0 W	✓ OK (≤3%)
50 mm²	151 A	118 A	0.22 V (0.06%)	399.8 V	0.37 V (0.09%)	7.7 W	✓ OK (≤3%)
70 mm²	192 A	150 A	0.16 V (0.04%)	399.8 V	0.26 V (0.07%)	5.5 W	✓ OK (≤3%)
95 mm²	232 A	181 A	0.12 V (0.03%)	399.9 V	0.19 V (0.05%)	4.1 W	✓ OK (≤3%)
120 mm²	269 A	210 A	0.09 V (0.02%)	399.9 V	0.15 V (0.04%)	3.2 W	✓ OK (≤3%)
150 mm²	309 A	241 A	0.07 V (0.02%)	399.9 V	0.12 V (0.03%)	2.6 W	✓ OK (≤3%)
185 mm²	353 A	275 A	0.06 V (0.02%)	399.9 V	0.1 V (0.02%)	2.1 W	✓ OK (≤3%)
240 mm²	415 A	324 A	0.05 V (0.01%)	400.0 V	0.08 V (0.02%)	1.6 W	✓ OK (≤3%)
300 mm²	477 A	372 A	0.04 V (0.01%)	400.0 V	0.06 V (0.02%)	1.3 W	✓ OK (≤3%)
400 mm²	570 A	445 A	0.03 V (0.01%)	400.0 V	0.05 V (0.01%)	1.0 W	✓ OK (≤3%)

Til 20 Ampere over 15 meter ved 400V anbefales 2.5 mm² kobberkabel (spændingsfald 4.45V / 1.11%).

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