VFD Motor Cable Length: Reflected Waves, dV/dt, EMC & Cable Selection
Learn how VFD motor cable length affects reflected-wave voltage, dV/dt, cable capacitance, motor insulation and EMC, and how to evaluate reactors, filters and cable construction.
Tag Electrical Calculations
Cable Resistance vs Impedance: R, X and Z in AC Power Cables
Understand cable resistance, reactance and impedance, including AC voltage drop, frequency effects, motor circuits, VFD cable behaviour and the difference between series and characteristic impedance.
Cable Power Loss: I²R Formula, Heat, Efficiency & Conductor Size
Calculate cable power loss with I²R and see how current, resistance, length, conductor size and temperature affect heat, voltage drop and energy use.
Three-Phase Motor Cable Sizing: kW, Amps, Cable Size & Voltage Drop
Size a three-phase motor cable from verified current through ampacity, derating, voltage drop, starting conditions, VFD and mechanical-duty checks.
Watts to Amps for Cable Selection: DC, Single-Phase and Three-Phase Guide
Convert watts and kW to amps for DC, single-phase and three-phase systems, then carry current through ampacity, cable-size and voltage-drop checks.
Cable Voltage Drop Calculation: Formulas, Examples and Cable Size Selection
Learn how to calculate cable voltage drop for DC, single-phase and three-phase circuits, compare worked examples, and select cable size using verified resistance, reactance and operating data.