What smoke detectors are required and their electrical supply?

In Quebec, smoke detectors are mandatory in all dwellings according to the Quebec Construction Code and the RBQ Safety Code:

Electrical requirements:

• Every smoke detector installed in a new dwelling must be connected to the electrical circuit (120 V) with battery backup
• Detectors must be interconnected: if one detector sounds, all sound
• Power supply: dedicated 15 A circuit maximum, or on a lighting circuit
• Minimum number: 1 per floor, plus 1 in each bedroom and 1 in the hallway leading to bedrooms

Location:

• On the ceiling or on the wall within 30 cm (12 inches) of the ceiling
• In the kitchen: at least 3 meters from cooking appliances to avoid false alarms
• Near stairways (basement, upper floor)

A detector's lifespan is 10 years. Carbon monoxide (CO) detectors are required if the home has a gas appliance or an attached garage.