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why in 3.5 core means 3 core for phase and .5 for neutral?
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Answer Posted / k.prakashchandra
Neutral current is undesirable . If 3 phase appliances are predominant or single phase loads are balanced, . the neutral current will be small . Further in protection scheme, the EFR is normally set at 20 % of the rated current . Hence main neutral conductor may be of half the size of phase conductors to save money .
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