Victory 8 for 356 (Harris 210 *, Handscomb 48, Sangha 3-47) lead New South Wales 159 for 197 races
Harris, 26, reached 19 limits and faced 357 balls his unbeaten epic 210. It was his ninth first class one hundred and his first double, surpassing his previous best of 158.
Since the start of 2016-17, when Harris moved from Western Australia to Victoria, has scored more Sheffield Shield runs and made more centuries than any other player in the competition.
Harris received constant support from his teammates throughout the day. He shared a 58-race stand with Cameron White, a 81-race partnership with Seb Gotch and added 57 with Chris Tremain to build a steady lead. The score was relatively slow with Victoria handling only 255 runs per day, Harris contributing 159 of them.
The Blues were able to keep the scoring rate under control, but they could not eliminate Harris. Jason Sangha proved to be the most dangerous bowler of the day. Their cheerful legbreaks claimed three windows. While White impatiently hid in the middle of the road, Sangha tricked Matt Short and Gotch.
Short fell to an excellent catch by Nick Larkin. Meanwhile, Gotch was cleaned by an excellent mistake.
Harris remained unbeaten in the stumps with Fawad Ahmed, and Victoria will try to build her lead early on day three.