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Question
what is the significance of 3.5 core cable? or what does this 
half core mean and why is it required?
 Question Submitted By :: Electrical-Engineering
I also faced this Question!!     Answer Posted By  
 
Answer
# 1
We take 3.5cx240sqmm Al cable,it have 3core for R,y,B phases
and 0.5c that is half of the Phase(120sqmm) for neutral.
That is known as LT cables.3C cables are HT cables.
 
Is This Answer Correct ?    6 Yes 4 No
Thiru Arasu
 
Answer
# 2
3.5 core means three core for RYB and half core is for
neutral as per IS-1554(p-1). this is in LT cables only upto
1100vots.
 
Is This Answer Correct ?    2 Yes 0 No
Anil
 
 
 
Answer
# 3
Thanks 
Is This Answer Correct ?    2 Yes 1 No
Aanchal
 
Answer
# 4
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.
 
Is This Answer Correct ?    3 Yes 4 No
Bharani
 

 
 
 
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