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

Kabeltverrsnitt for 25 Ampere ved 20 Meter (400V — NEK 400)

Nøyaktig beregning av kabeltverrsnitt (mm²), spenningsfall og sikring etter norsk standard NEK 400 for 25 A over 20 m ved 400V.

Copper Cable (≤3% Drop)4 mm²Drop: 4.63V (1.16%)

Aluminum Cable (≤3% Drop)4 mm²Drop: 7.64V (1.91%)

Voltage at Load395.4 VLine Loss: 200.6 W

Max Power & Breaker17.32 kW25A MCB/MCCB

IEC 60364 Cable Cross-Section Table (1.5 mm² – 400 mm²) for 25A at 20m

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	12.36 V (3.09%)	387.6 V	20.38 V (5.1%)	535.0 W	Drop High
2.5 mm²	24 A	18 A	7.41 V (1.85%)	392.6 V	12.23 V (3.06%)	321.0 W	Drop High
4 mm²	32 A	25 A	4.63 V (1.16%)	395.4 V	7.64 V (1.91%)	200.6 W	✓ OK (≤3%)
6 mm²	41 A	32 A	3.09 V (0.77%)	396.9 V	5.1 V (1.27%)	133.8 W	✓ OK (≤3%)
10 mm²	57 A	44 A	1.85 V (0.46%)	398.1 V	3.06 V (0.76%)	80.2 W	✓ OK (≤3%)
16 mm²	76 A	59 A	1.16 V (0.29%)	398.8 V	1.91 V (0.48%)	50.2 W	✓ OK (≤3%)
25 mm²	101 A	78 A	0.74 V (0.19%)	399.3 V	1.22 V (0.31%)	32.1 W	✓ OK (≤3%)
35 mm²	125 A	97 A	0.53 V (0.13%)	399.5 V	0.87 V (0.22%)	22.9 W	✓ OK (≤3%)
50 mm²	151 A	118 A	0.37 V (0.09%)	399.6 V	0.61 V (0.15%)	16.1 W	✓ OK (≤3%)
70 mm²	192 A	150 A	0.26 V (0.07%)	399.7 V	0.44 V (0.11%)	11.5 W	✓ OK (≤3%)
95 mm²	232 A	181 A	0.2 V (0.05%)	399.8 V	0.32 V (0.08%)	8.4 W	✓ OK (≤3%)
120 mm²	269 A	210 A	0.15 V (0.04%)	399.8 V	0.25 V (0.06%)	6.7 W	✓ OK (≤3%)
150 mm²	309 A	241 A	0.12 V (0.03%)	399.9 V	0.2 V (0.05%)	5.3 W	✓ OK (≤3%)
185 mm²	353 A	275 A	0.1 V (0.03%)	399.9 V	0.17 V (0.04%)	4.3 W	✓ OK (≤3%)
240 mm²	415 A	324 A	0.08 V (0.02%)	399.9 V	0.13 V (0.03%)	3.3 W	✓ OK (≤3%)
300 mm²	477 A	372 A	0.06 V (0.02%)	399.9 V	0.1 V (0.03%)	2.7 W	✓ OK (≤3%)
400 mm²	570 A	445 A	0.05 V (0.01%)	400.0 V	0.08 V (0.02%)	2.0 W	✓ OK (≤3%)

Etter NEK 400 anbefales 4 mm² kobberkabel for 25A ved 20 meter (400V), som gir et spenningsfall på 4.63V (1.16%).

Kursen leverer opptil 17.32 kW med 25A vern.