Current Consumption of an Electric Motor from Calculation without Powering It


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Is there any calculation to know the no load power consumption of a motor without running it?
No. It depends on too many variables in the motor design. You can ESTIMATE it at around 30% of FLA, but in reality that could be anywhere from 20-40% and in small motors, often 60%.

In my opinion the only value in knowing the no-load current is purely empirical, for monitoring it over time for changes in order to trend and predict problems, or to determine if a belt or shaft has broken. So install it. measure it immediately and record that value for future reference. Any other use is essentially pointless.