Answer / goutam ghosh

Busbar size for a rated current can be calculated from
CURRENT DENSITY. Current density for copper is 160
amps/sqcm.(1000 Amp/sqinch.)and for Aluminium the same is
130 Amp/sqcm.(800Amp/sqinch.).Say for 200 amps reated
current Aluminium busbar of cross section 30mm X 5mm or
Copper busbar having cross section 25mm X 5mm should be
used according to nearest availability at market.

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