Estimate motor current from its rating and supply. Confirm with the nameplate.
Typical motor-current lookup or rating-based estimate. Use motor nameplate current and starting/protection requirements for final selection.
Results
Enter motor power and supply, then calculate.
Method and assumptions
Table method: typical full load currents for 4-pole squirrel-cage motors at 50 Hz, taken at the next listed rating up. Above the largest listed motor the current is scaled in proportion to power.
Formula method: I = P ÷ (V × η × pf) for single-phase, or P ÷ (√3 × V × η × pf) for three-phase.
AS/NZS 3000 does not tabulate motor currents. Use the nameplate current for cable and protection selection.
