The Ontario Building Code | Emergency Power Supply Installation
3.2.7.5. Emergency Power Supply installation
(1) Except as required by Articles 3.2.7.6. and 3.2.7.7., an emergency electrical power system shall be installed in conformance with CSA C282, "Emergency Electrical Power Supply for buildings".
(2) Every emergency power supply shall be equipped with an emergency audible and visual trouble indication.
In Plain Language
This clause addresses emergency power requirements specific to elevators, ensuring at least one elevator can still operate (often at reduced capacity) during a power outage so building occupants who need it aren't stranded.
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.