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3.1.5.18.(1)
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Application
Application 1: 
Optical fibre cables and electrical wires and cables with combustible insulation, jackets or sheathes in buildings described in Sentence 1.3.3.2.(1) of Division A that are required to be of noncombustible construction, where:
  • the wires and cables exhibit a vertical char of not more than 1.5 m when tested in conformance with the Vertical Flame Test Cables in Cabletrough in Clause 4.11.4. of CSA-C22.2 No. 0.3, “Test Methods for Electrical Wires and Cables,”
  • the wires and cables are communication cables used at the service entry to a building and are not more than 3 m long, or
  • the wires and cables are located in:
Exceptions: 
except as stated in Article 3.1.5.19., which applies to combustible travelling cables for elevators.
Application 2: 
This also applies to buildings to which Part 9 applies [see Sentence 1.3.3.3.(1) of Division A for application of Part 9] that are required to be of noncombustible construction, as stated in Sentence 9.10.6.1.(1).
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Intent
Intent 1: 
To exempt certain combustible materials from the application of Sentence 3.1.5.1.(1) if certain conditions are met, on the basis that the materials are deemed to insignificantly contribute to fire growth and spread.
Intent 2: 
To direct Code users to Article 3.1.5.20.
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