The Ontario Building Code | Emergency Power Installations
9.10.10.7. Emergency Power installations
(1) Where a generator intended to supply emergency power for lighting="http://thehandyforce.com/electrical/" title ="East York Electrician">lighting, fire safety and life safety systems is located in a building, it shall be located in a room that,
(a) is separated from the remainder of the building by a fire separation with a fire-resistance rating not less than,
(i) 1 h, if the floor assembly is not required to have a fire-resistance ratingof more than 1 h, and
(ii) 2 h, if the floor assembly is required to have a fire-resistance ratingof more than 1 h, and
(b) contains only the generating set and equipment that is related to the emergency power supply system.
9.10.11. Firewalls
In Plain Language
Emergency power installations, such as backup generators, have specific requirements set out in this article addressing their safe location and installation.
This is a plain-language summary of the 2012/2017 Ontario Building Code text above, for general understanding only and not a substitute for the Code. Always confirm current requirements against the 2024 edition (O.Reg. 163/24) or a qualified professional before construction.