[ \Delta U = \frac\sqrt3 \cdot L \cdot I_b \cdot (R \cos\phi + X \sin\phi)1000 \quad (\textfor AC, 3-phase) ]
: This is the primary standard for cable selection in Australia, covering current ratings and voltage drop.
Maximum allowable voltage drop (typically , 5% for other power loads from the point of supply).
(Joule Heating Calculation) refers to the analytical process of determining the minimum permissible cross-sectional area of an electrical cable based on thermal limits, voltage drop, and short-circuit withstand capability. Proper cable sizing is critical to prevent insulation degradation, fire hazards, and unacceptable system losses.
: Sizing ensures that protective devices, like circuit breakers, can detect and interrupt faults before damage occurs. Core Functionality of jCalc JCalc vs Cable Pro Web: A Complete Comparison
400V, 50 kW motor, 3-phase, cosφ = 0.85, length = 120 m, PVC copper cable, clipped direct (reference method C), ambient 40°C, no grouping, 0.2s fault clearing, 10 kA short-circuit.
