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

Kabeltværsnit for 20 Ampere ved 45 Meter (400V)

Beregning af kabeltværsnit (mm²), spændingsfald og sikringsstørrelse efter dansk standard DS/HD 60364 for 20 A over 45 m ved 400V.

Copper Cable (≤3% Drop)4 mm²Drop: 8.34V (2.08%)

Aluminum Cable (≤3% Drop)6 mm²Drop: 9.17V (2.29%)

Voltage at Load391.7 VLine Loss: 288.9 W

Max Power & Breaker13.86 kW20A MCB/MCCB

IEC 60364 Cable Cross-Section Table (1.5 mm² – 400 mm²) for 20A at 45m

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	22.24 V (5.56%)	377.8 V	36.68 V (9.17%)	770.4 W	Drop High
2.5 mm²	24 A	18 A	13.34 V (3.34%)	386.7 V	22.01 V (5.5%)	462.2 W	~ ≤5%
4 mm²	32 A	25 A	8.34 V (2.08%)	391.7 V	13.76 V (3.44%)	288.9 W	✓ OK (≤3%)
6 mm²	41 A	32 A	5.56 V (1.39%)	394.4 V	9.17 V (2.29%)	192.6 W	✓ OK (≤3%)
10 mm²	57 A	44 A	3.34 V (0.83%)	396.7 V	5.5 V (1.38%)	115.6 W	✓ OK (≤3%)
16 mm²	76 A	59 A	2.08 V (0.52%)	397.9 V	3.44 V (0.86%)	72.2 W	✓ OK (≤3%)
25 mm²	101 A	78 A	1.33 V (0.33%)	398.7 V	2.2 V (0.55%)	46.2 W	✓ OK (≤3%)
35 mm²	125 A	97 A	0.95 V (0.24%)	399.0 V	1.57 V (0.39%)	33.0 W	✓ OK (≤3%)
50 mm²	151 A	118 A	0.67 V (0.17%)	399.3 V	1.1 V (0.28%)	23.1 W	✓ OK (≤3%)
70 mm²	192 A	150 A	0.48 V (0.12%)	399.5 V	0.79 V (0.2%)	16.5 W	✓ OK (≤3%)
95 mm²	232 A	181 A	0.35 V (0.09%)	399.6 V	0.58 V (0.14%)	12.2 W	✓ OK (≤3%)
120 mm²	269 A	210 A	0.28 V (0.07%)	399.7 V	0.46 V (0.11%)	9.6 W	✓ OK (≤3%)
150 mm²	309 A	241 A	0.22 V (0.06%)	399.8 V	0.37 V (0.09%)	7.7 W	✓ OK (≤3%)
185 mm²	353 A	275 A	0.18 V (0.05%)	399.8 V	0.3 V (0.07%)	6.2 W	✓ OK (≤3%)
240 mm²	415 A	324 A	0.14 V (0.03%)	399.9 V	0.23 V (0.06%)	4.8 W	✓ OK (≤3%)
300 mm²	477 A	372 A	0.11 V (0.03%)	399.9 V	0.18 V (0.05%)	3.9 W	✓ OK (≤3%)
400 mm²	570 A	445 A	0.08 V (0.02%)	399.9 V	0.14 V (0.03%)	2.9 W	✓ OK (≤3%)

Til 20 Ampere over 45 meter ved 400V anbefales 4 mm² kobberkabel (spændingsfald 8.34V / 2.08%).

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