what is need of air gap in expansion section in busbar?

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what is need of air gap in expansion section in busbar?..

Answer / venu

Dear sir (Anto)
dont misleed the question many yuongsters are going
through this site

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what is need of air gap in expansion section in busbar?..

Answer / sudhakar g

According to Book i studied in Tamilnadu rules for
Electrical contractors it should be 315mm of airgap in
busbar

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what is need of air gap in expansion section in busbar?..

4mm

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3 No

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