The Ontario Building Code | Interconnection of Smoke Alarms

9.10.19.5. Interconnection of Smoke Alarms

(1) Where more than one smoke alarm is required in a dwelling unit, the smoke alarmsshall be wireref ="http://thehandyforce.com/electrical/" title ="Electricians in East York">wired so that the activation of one alarm will cause all alarms within the dwelling unit to sound.