(1)
The carbon monoxide alarms required by Articles 6.9.3.2. and 6.9.3.3. shall
(a)
except as permitted in Sentence (2), be permanently connected to an electrical circuit and shall have no disconnect switch between the overcurrent device and the carbon monoxide alarm,
(b)
in case the regular power supply to the carbon monoxide alarm is interrupted, be provided with a battery as an alternative power source that can continue to provide power to the carbon monoxide alarm for a period of not less than 8 h in the standby condition, followed by the operation of the carbon monoxide alarm for an alarm signal for at least 12 h,
(c)
be wired so that
(i)
activation of one carbon monoxide alarm within a suite of residential occupancy will activate all carbon monoxide alarms within the suite, and
(ii)
activation of one carbon monoxide alarm located in a public corridor serving suites of residential occupancy will activate all carbon monoxide alarms within the corridor,
(d)
be audible within sleeping rooms when the intervening doors are closed, where located adjacent to a sleeping room in a suite of residential occupancy, and
(e)
conform to
(i)
CAN/CSA-6.19, “Residential Carbon Monoxide Alarming Devices”, or
(ii)
UL 2034, “Single and Multiple Station Carbon Monoxide Alarms”.
(2)
Where the building is not supplied with electrical power, carbon monoxide alarms are permitted to be battery operated.
(3)
Except as permitted in Sentence (4), the carbon monoxide alarms required by Articles 6.9.4.2. and 6.9.4.3. shall have a visual signalling component conforming to the requirements in 18.5.3. (Light, Color and Pulse Characteristics) of NFPA 72, “National Fire Alarm and Signaling Code”.
(4)
Where the building is not supplied with electrical power, carbon monoxide alarms need not have a visual signalling component.
(5)
The luminous intensity for visual signalling components required by Sentence (3) that are installed in sleeping rooms or combined living and sleeping areas shall be a minimum of 175 cd.
(6)
The visual signalling component required by Sentence (3) need not
(a)
be integrated with the carbon monoxide alarm provided it is interconnected to it,
(b)
be on battery backup, or
(c)
have synchronized flash rates, when installed in a dwelling unit.
(7)
The carbon monoxide alarms required by Articles 6.9.3.2. and 6.9.3.3. shall be installed
(a)
at the manufacturer’s recommended height, or
(b)
in the absence of specific instructions, on or near the ceiling.