Bradley Johnson scored twice to send Norwich into the Championship’s automatic promotion places and condemn the Owls to defeat on the road.
The former Leeds man struck twice in the first half to secure a deserved lead for a Norwich outfit that were the better side throughout.
The comfortable margin was nothing more than the hosts deserved after a relentless attacking performance.
The Owls survived an early nervy moment when Norwich striker Cameron Jerome tumbled in the box. Jerome went down under pressure from Claude Dielna but no foul was given.
Norwich started the game the stronger and it took strong hands from Keiren Westwood to keep out a fine volley from Alex Tettey.
Lloyd Isgrove showed his threat for the Owls as he robbed possession on half way before charging forward and drilling narrowly wide.
The Owls had few opportunities to show their teeth during the opening period. Caolan Lavery went close with a header from a Chris Maguire cross on a right sight of goal.
Norwich went back into the ascendency as the half wore on and Steven Whittaker put an effort just over the bar after a Wes Hoolahan delivery.
And they took the lead on 33 minutes when Johnson rose well to beat Marnick Vermijl at the far post and headed home.
After Johnson’s opener, Westwood was forced into a fine stop to prevent the hosts from doubling their advantage, palming away a Graham Dorrans strike.
On the stroke of half time the lead was doubled when the Owls failed to deal with a Graham Dorrans corner, allowing Johnson to hook home from the middle of the box.
The pattern of the game was much the same after the break. Wednesday worked hard throughout but were always second best.
Johnson went in the hunt of a hat trick and saw a deflected effort saved easily by Westwood four minutes in.
Norwich eased off in the final quarter with the game looking already won. Johnny Howson fired well over the bar in a rare opportunity for either side.
Substitute Nathan Redmond fired wide after a superb sweeping move from the hosts.
The Owls were forced to see out the last ten minutes of the game with ten men after an injury to Claude Dielna.
Wednesday: Westwood, Vermijl (Buxton 46), Lees, Dielna, Mattock; Melo, McGugan, Lee; Isgrove (Nuhiu 46), Maguire, Lavery (Bus 78).
Subs not used: Kirkland, Hutchinson, May, Zayatte.
Norwich: Ruddy; Whittaker, Martin, Bassong, Olsson; Howson, Tettey, Dorrans (Hooper 88), Johnson (Odjidja-Ofoe 90); Hoolahan (Redmond 79); Jerome.
Subs not used: Rudd, Becchio, R Bennett, O’Neil.
Referee: Carl Boyeson (East Yorkshire)