Answer / rajendra.s

It depend on which metal you are using copper/aluminum.
& it also depends on density.
to calculate busbars multipy cross sections.
For AL if density is 0.7/1A
Eg.for 100A incomer density .7 busbar is 20x10MM=140A.
with 1A density 10x10mm=100A
For CU standard density is 1.5/1.8A

From Rajendra Sawant
Miraj

Iam deepthi.i completed my b.tech from electrical engineering.i want to prepare for civil services.i dont have much knowledge about these exams,but i have great zeal of cracking exams.plz provide me suggestions to which options i can select for optionals

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