Answer Posted / habib

Cable size (sq.mm.) is selected dpendent on 4 facors

1. Current carrying capacity (popularly termed Amapcity)
of the cable.
2. Voltage drop that can be tolerated at the load point.
3. Short circuit tolerance of the cable.
4. Mechanical strength of the cable.

A cable is selected fo the job that can meet all these
criteria.

Basically HT and LT cables are of same material but the
difference is in insulation.

Looks too much like a text book lesson. If you can post
your exact requirement, I would try to help.

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