The Ontario Building Code | Emergency Power for Lighting
184.108.40.206. Emergency Power for lighting="http://thehandyforce.com/electrical/" title ="East York Electrician">lighting
(1) An emergency power supply shall be,
(a) provided to maintain the emergency lighting="http://thehandyforce.com/electrical/" title ="East York Electrician">lighting required by this Subsection from a power source such as batteries or generators that will continue to supply power in the event that the regular power supply to the building is interrupted, and
(b) so designed and installed that upon failure of the regular power it will assume the electrical load automatically for a period of,
(i) 2 h for a building within the scope of Subsection 3.2.6.,
(ii) 1 h for a building of Group B major occupancyclassification that is not within the scope of Subsection 3.2.6.,
Note: On July 1, 2017, Clause 220.127.116.11.(1)(b) of Division B of the Regulation is amended by adding the following Subclause: (See: O. Reg. 139/17, s. 33)
(ii.1) 1 h for a building that contains a Group C major occupancy retirement home and that is not within the scope of Subsection 3.2.6.,
(iii) 1 h for a building within the scope of Article 18.104.22.168A. or 22.214.171.124A., and
(iv) 30 min for any other building.
(2) If self-contained emergency lighting units are used, they shall conform to CSA C22.2 No. 141, "Emergency Lighting Equipment".