Answer / nilkanth tailor

1. low maintnance..
2. in overhead line, thier is 3 or 4 different wire
required..but in UG 3 phase can be used in just one UG
cable 3 diff phase in singl cable...
3. thier is no any corona losses...
4. no corrosion...
5 rarely fault occured...

Answer / vinoth

1.neat and beautiful approch
2.no environmental effects

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