Code Library › Volume 1 › Section 9.34 — Electrical Facilities
PART 9 — HOUSING AND SMALL BUILDINGSUpdated for the 2024 Ontario Building Code

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 in buildings 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, (See Note A-3.1.4.3.(1)(b)(i)) (ii) masonry walls, (iii) concrete slabs, or (iv) totally enclosed non metallic raceways conforming to Clause 3.1.5.23.(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 Clause 3.6.4.3.(1)(a).
← Previous9.34.1.4. Recessed Lighting FixturesNext →9.34.2.1. Lighting of Entrances

Common questions about this part of the code

Which rooms in a house require lighting outlets in Ontario?How does the Ontario Building Code relate to the Ontario Electrical Safety Code for house wiring?

Understand this provision in seconds

BUILDAiD Assist explains any article of the building code in plain English — with exact citations, exceptions and related requirements.

Try BUILDAiD Beta

Code text is reproduced for reference from the Ontario Building Code (O. Reg. 163/24, 2024 Building Code Compendium). This page is provided for general information and is not an official copy. Always verify requirements against the official Ontario Building Code and confirm with your local building department.