3.2.7.9.

(1) An emergency power supply capable of operating under a full load for not less than 2 h shall be provided by an emergency generator for,

(a) every elevator serving storeys above the first storey in a building that is more than 36 m high measured between grade and the floor level of the top storey and every elevator for fire fighters in conformance with Sentence (2),

(b) water supply for fire fighting in conformance with Article 3.2.5.7., if the supply is dependent on electrical power supplied to the building, and the building is within the scope of Subsection 3.2.6.v1,

(c) fans and other electrical equipment that are installed to maintain the air quality specified in Article 3.2.6.2.v1, and

(d) fans required for venting by Article 3.2.6.6.v1

(2) Except as permitted by Sentence (3), the emergency power supply for elevators required by Clause (1)(a) shall be capable of operating all elevators for fire fighters plus one additional elevator simultaneously.

(3) Sentence (2) does not apply if the time to recall all elevators under emergency power supply is not more than 5 min, each from its most remote storey to,

(a) the storey containing the entrance for fire fighter access referred to in Articles 3.2.5.4 and 3.2.5.5., or

(b) to a transfer lobby.

(4) Except as provided by Sentence (5), an emergency power supply capable of operating under a full load for not less than 30 min shall be provided by emergency generator for water supply for fire fighting in conformance with Article 3.2.5.7., if the supply is dependent on electrical power supplied to the building, and the building is not within the scope of Subsection 3.2.6.v1

(5) Sentence (4) does not apply to the water supply for a standpipe system.