HKIE Professional Assessment - Electrical Discipline Practice Questions - HKIE Professional Assessment - Electrical Discipline (Hong Kong Institution Of Engineers) Exam

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A 400V 3-phase 4-wire sub-main circuit carries a balanced design load current of 120 A over a cable route length of 80 meters. The selected copper XLPE cable has a tabulated voltage drop value of 0.38 mV/A/m. What is the total voltage drop and percentage voltage drop at the load terminals?

3.648 V (0.91%) 7.296 V (1.82%) 12.637 V (3.16%) 28.80 V (7.20%)

Correct Answer:

3.648 V (0.91%)

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