The Ontario Building Code | Wiring and Cables
9.34.1.5. Wiring and Cables
(1) Except for dwelling units and except as required in Sentence (2), optical fibre cables and electrical wires and cables installed inbuildings permitted to be of combustible construction shall,
(a) not convey flame or continue to burn for more than 1 min when tested in conformance with the Vertical Flame Test in Clause 4.11.1. of CSA C22.2 No. 0.3, "Test Methods for Electrical wires and Cables", (FT1 Rating), or
(b) be located in,
(i) totally enclosed noncombustible raceways,
(ii) masonry walls,
(iii) concrete slabs, or
(iv) totally enclosed non metallic raceways conforming to Clause 3.1.5.20.(1)(b).
(2) Where a concealed space in a floor or ceiling assembly is used as a plenum, electrical wires and cables within the plenum shall conform to Sentence 3.6.4.3.(1).
9.34.2. lighting="http://thehandyforce.com/electrical/" title ="East York Electrician">lighting Outlets
In Plain Language
Wiring and cables must meet the requirements set out in this article, ensuring safe electrical installation practices.
This is a plain-language summary of the 2012/2017 Ontario Building Code text above, for general understanding only and not a substitute for the Code. Always confirm current requirements against the 2024 edition (O.Reg. 163/24) or a qualified professional before construction.