what should be the air clearence between phase to phase, phase to earth in Med

what should be the air clearence between phase to phase,
phase to earth in Medium voltage switchgear for
3.3kv,6.6kv,11kv,22kv and 33kv? Which is to be referred for
this?

Question Posted / rajashekar

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what should be the air clearence between phase to phase, phase to earth in Medium voltage switchge..

Answer / k.prakashchandra

IE Rules 1956

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