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for 12KW motor which cable size has to select for ex.10
meter.
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Answer Posted / phanendra babu
the selected cable should have the capability of
withstanding the over load /short ckt currents upto before
operating the protecting device. so assume 0.81 p.f,the load
current is given by apprx 20A .very safe working of copper
cable is 4A to 6A per 1sqmm ,so the size of the cable
suitable for 12kw motor is 6sqmm. copper cable or 16 sqmm
aluminum cable.
the above calculation is for lo current ratings if current
rating increases capacity will decrease.
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