(1)
The protection of electrical and emergency conductors referred to in Clauses (a) to (c) shall conform to the requirements stated in Sentences (2) to (11):
(a)
electrical conductors located within buildings identified in Article 3.2.6.1. serving
(i)
fire alarms,
(ii)
emergency lighting, or
(ii)
emergency equipment within the scope of Articles 3.2.6.2. to 3.2.6.8.,
(b)
emergency conductors serving fire pumps required to be installed under Article 3.2.5.18., and
(c)
emergency conductors serving mechanical systems serving
(i)
areas of refuge identified in Clause 3.3.3.6.(1)(b), or
(ii)
contained use areas referred to in Clauses 3.3.3.7.(4)(a) and (b).
(2)
Except as otherwise required by Sentence (3) and permitted by this Article, electrical conductors that are used in conjunction with systems identified in Sentence (1) shall
(a)
conform to CAN/ULC-S139, “Standard for Fire Test for Circuit Integrity of Fire-Resistive Power, Instrumentation, Control and Data Cables,” including the hose stream application, to provide a circuit integrity rating of not less than 1 h, or (See Note A-3.2.7.10.(2)(a) and (3)(a)) (See also Clause 3.2.6.5.(6)(b))
(b)
be located in a service space that is separated from the remainder of the building by a fire separation that has a fire-resistance rating of not less than 1 h.
(3)
Electrical conductors identified in Clause (1)(c) shall
(a)
conform to CAN/ULC-S139, “Standard for Fire Test for Circuit Integrity of Fire-Resistive Power, Instrumentation, Control and Data Cables,” including the hose stream application, to provide a circuit integrity rating of not less than 2 h, or (See Note A-3.2.7.10.(2)(a) and (3)(a))
(b)
be located in a service space that is separated from the remainder of the building by a fire separation that has a fire-resistance rating of not less than 2 h.
(4)
The service spaces referred to in Clause (2)(b) and (3)(b) shall not contain any combustible materials other than the electrical conductors being protected.
(5)
Except as permitted by Sentences (7) and (9), the electrical conductors referred to in Sentence (1) are those that extend from the source of emergency power to
(a)
the equipment served, or
(b)
the distribution equipment supplying power to the equipment served, if both are in the same room. (See Note A-3.2.7.10.(5)(b))
(6)
If a fire alarm transponder or annunciator located in one fire compartment is connected to a central processing unit or another transponder or annunciator located in a different fire compartment, the electrical conductors connecting them shall be protected in accordance with Sentence (2).
(7)
Fire alarm system branch circuits within a storey that connect transponders and individual devices need not conform to Sentence (2). (See Note A-3.2.7.10.(7))
(8)
Except as permitted in Sentence (9), if a distribution panel supplies power to emergency lighting, the power supply conductors leading up to the distribution panel shall be protected in accordance with Sentence (2).
(9)
Conductors leading from a distribution panel referred to in Sentence (8) to emergency lighting units in the same storey need not conform to Sentence (2).
(10)
Distribution panels serving emergency lighting units located on other storeys shall be installed in a service room separated from the floor area by a fire separation having a fire-resistance rating of at least 1 h.
(11)
Conductors leading from a distribution panel to emergency lighting units located on other storeys shall be protected in accordance with Sentence (2) between the distribution panel and the floor area where the emergency lighting units are located.