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

Kabeltværsnit for 20 Ampere ved 40 Meter (400V)

Beregning af kabeltværsnit (mm²), spændingsfald og sikringsstørrelse efter dansk standard DS/HD 60364 for 20 A over 40 m ved 400V.

Copper Cable (≤3% Drop)2.5 mm²Drop: 11.86V (2.97%)

Aluminum Cable (≤3% Drop)6 mm²Drop: 8.15V (2.04%)

Voltage at Load388.1 VLine Loss: 410.9 W

Max Power & Breaker13.86 kW20A MCB/MCCB

IEC 60364 Cable Cross-Section Table (1.5 mm² – 400 mm²) for 20A at 40m

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	19.77 V (4.94%)	380.2 V	32.61 V (8.15%)	684.8 W	Drop High
2.5 mm²	24 A	18 A	11.86 V (2.97%)	388.1 V	19.57 V (4.89%)	410.9 W	✓ OK (≤3%)
4 mm²	32 A	25 A	7.41 V (1.85%)	392.6 V	12.23 V (3.06%)	256.8 W	✓ OK (≤3%)
6 mm²	41 A	32 A	4.94 V (1.24%)	395.1 V	8.15 V (2.04%)	171.2 W	✓ OK (≤3%)
10 mm²	57 A	44 A	2.97 V (0.74%)	397.0 V	4.89 V (1.22%)	102.7 W	✓ OK (≤3%)
16 mm²	76 A	59 A	1.85 V (0.46%)	398.1 V	3.06 V (0.76%)	64.2 W	✓ OK (≤3%)
25 mm²	101 A	78 A	1.19 V (0.3%)	398.8 V	1.96 V (0.49%)	41.1 W	✓ OK (≤3%)
35 mm²	125 A	97 A	0.85 V (0.21%)	399.2 V	1.4 V (0.35%)	29.3 W	✓ OK (≤3%)
50 mm²	151 A	118 A	0.59 V (0.15%)	399.4 V	0.98 V (0.24%)	20.5 W	✓ OK (≤3%)
70 mm²	192 A	150 A	0.42 V (0.11%)	399.6 V	0.7 V (0.17%)	14.7 W	✓ OK (≤3%)
95 mm²	232 A	181 A	0.31 V (0.08%)	399.7 V	0.51 V (0.13%)	10.8 W	✓ OK (≤3%)
120 mm²	269 A	210 A	0.25 V (0.06%)	399.8 V	0.41 V (0.1%)	8.6 W	✓ OK (≤3%)
150 mm²	309 A	241 A	0.2 V (0.05%)	399.8 V	0.33 V (0.08%)	6.8 W	✓ OK (≤3%)
185 mm²	353 A	275 A	0.16 V (0.04%)	399.8 V	0.26 V (0.07%)	5.6 W	✓ OK (≤3%)
240 mm²	415 A	324 A	0.12 V (0.03%)	399.9 V	0.2 V (0.05%)	4.3 W	✓ OK (≤3%)
300 mm²	477 A	372 A	0.1 V (0.02%)	399.9 V	0.16 V (0.04%)	3.4 W	✓ OK (≤3%)
400 mm²	570 A	445 A	0.07 V (0.02%)	399.9 V	0.12 V (0.03%)	2.6 W	✓ OK (≤3%)

Til 20 Ampere over 40 meter ved 400V anbefales 2.5 mm² kobberkabel (spændingsfald 11.86V / 2.97%).

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