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what is the significance of 3.5 core cable? or what does this
half core mean and why is it required?
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Answer Posted / bharani
3.5 core in an armoured cable means, neutral cable will be
half in diameter that of phase cable .This is used in LT
circuit where you may use 3 phase load as well as single
phase load.If the load on three phases is balanced, the
neutral current will be less hence half core for neutral may
be sufficient. But if the load on three phases tends to vary
a lot, then neutral curent may increase and in such cases 4
core cable instead of 3.5 core would be recommended.
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