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How you calculating the current for a 2.5 Sqmm cable.
A 30 Hp 3 phase AC motor of power what size of cable is
used for this motor.
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Answer Posted / ramesh insan
As per thumb rule
Power Sq root 3=1.732
Voltage =415
PF=0.8
Cos=0.85
1.732*415*0.8*0.85=488.77
30HP*746W=22380/488.77=45.79 Amp
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