Dean Brownlie picked up where he left off on day two of Northern Districts' Plunket Shield encounter with Central Districts at Pukekura Park in New Plymouth.
The opener began yesterday on 222 not out and continued to plunder the CD attack as he made a Northern Districts record 334 before he was finally dismissed by George Worker.
The innings eclipsed Kane William's 284 for ND against Wellington in 2011 and Brownlie's triple was only the seventh time a batsman had passed 300 on New Zealand soil " in test or first-class cricket.
Brownlie's innings helped ND record their fifth-best total in first-class cricket as they eventually declared at 556/9. No CD bowler had figures that required a mention. Mitchell Santer, at No7, made 101.
CD were 145/4 in reply in their first innings when play closed. At Karori Park in the capital, Wellington lost the toss, were put in by Otago and crawled to 270/9 on day one.