Cable Size by Voltage-Drop Check

Range: 0.01–100,000 A

Enter the operating or design current in amperes on the same RMS basis as the reference impedance data.

Range: 1–3

Use 2 for a single-phase out-and-back path, or the appropriate factor for the balanced three-phase model used by the project.

Range: 0.01–100,000 m

Enter the one-way route length in metres. The path factor applies the return or three-phase relationship in the calculation.

Range: 1–100,000 V

Enter the system voltage used to convert the entered percentage limit to volts. Use the project phase basis, such as 230/240 V single phase or 400/415 V line-to-line three phase.

Range: 0.01–100 %

Enter the permitted voltage-drop percentage from the applicable project design basis. The calculator does not supply a universal Australian limit.

Range: 0.01–100,000 mm²

Enter the conductor area associated with the reference resistance and reactance data.

Range: 0.0001–100,000 Ω/km

Enter verified conductor resistance in ohms per kilometre at the stated temperature and installation basis.

Range: 0–100,000 Ω/km

Enter verified conductor reactance in ohms per kilometre at the stated cable arrangement and installation basis.

Range: 0.01–1

Enter the operating power factor for the load. The model uses the entered PF to weight the reference resistance and reactance.

Range: 0.01–100,000 mm²

Enter the candidate conductor area in mm² so its calculated voltage drop can be compared with the entered limit.