Vaši podaci
Uredive primjerene vrijednostiVaša procjena
Ažurirani rezultatNajmanje · Površina · Pad napona
3.93 mm²
Površina
4 mm²
Voltage-drop criterion only
Pad napona
1.31 %
2.62 V · 39.3 W Gubitak
Rezultati služe za planiranje. Provjerite pretpostavke prije odabira opreme.
Lokacija i tarife ne preuzimaju se automatski. Izračun koristi unesene vrijednosti.
Kako koristiti kalkulator
Unesite struju i duljinu kabela u jednom smjeru. Rezultat obuhvaća pad napona; dopuštenu struju i zaštitu provjerite zasebno.
Način izračuna
DC loop resistance = 2 × one-way length × resistivity ÷ area. Voltage drop = current × resistance. Required area = 2 × length × current × resistivity ÷ allowed voltage drop. Copper ρ20 = 0.0175 and aluminium ρ20 = 0.0282 Ω·mm²/m; temperature coefficients are 0.00393 and 0.00403 /°C.
Prije korištenja rezultata
Voltage-drop sizing only: this does NOT check ampacity, insulation voltage, conduit fill, bundling, ambient derating, protective devices, connectors or local electrical rules. Final cable selection must satisfy those checks. Do not use this DC model for three-phase AC.
Is the suggested mm² safe for the current?
Not necessarily. It only meets the entered voltage-drop target. An installer must separately verify ampacity and installation requirements.