Fire stopping of piping, tubing, ducts, chimneys, optical fibre cables, electrical wires and cables, totally enclosed noncombustible raceways, electrical outlet boxes and other similar building services that penetrate a firewall or a horizontal fire separation that is required to have a fire-resistance rating in conformance with Article 3.2.1.2. [and performs a similar function as a firewall].

This applies to buildings described in Sentence 1.3.3.2.(1) of Division A, and to buildings to which Part 9 applies [see Sentence 1.3.3.3.(1) of Division A for application of Part 9] as stated in Sentence 9.10.11.3.(1).

To limit the probability that openings in certain fire separations--made by various types of service equipment penetrations--are not properly sealed [as required by the referenced test method], which could lead to a loss of integrity of the fire separations, which could lead to the spread of fire and smoke from the adjacent building to the building, which could lead to harm to persons in the building.

To limit the probability that openings in certain fire separations--made by various types of service equipment penetrations--are not properly sealed [as required by the referenced test method], which could lead to a loss of integrity of the fire separations, which could lead to the spread of fire and smoke from the building to the adjacent building, which could lead to harm to persons in the adjacent building.

To exempt openings made by service equipment penetrations in certain fire separations from the application of Sentence 3.1.9.1.(1), on the basis that a higher level of performance with respect to sealing is required for these fire separations.