** 29Metals plunges as much as 28.4% to A$0.265, lowest since Feb. 26

** Stock logs biggest intraday pct fall since March 26

** Copper-focused miner on Tuesday announced A$180 mln ($115.7 mln) equity raising at A$0.27

** Offer price represents 27% discount to Tuesday's close

** Stock top loser on ASX All Ordinaries index

** 29M down 42.6% this year, as of last close

($1 = A$1.5552)

(Reporting by Aaditya Govind Rao in Bengaluru)

((Aaditya.govindrao@thomsonreuters.com;))