MarkhamBuilding InspectionsInspections

Electrical Wires and Cables

Published by City of Markham

This is the City of Markham’s document, as published on its website on 18 October 2026. The municipality may have changed it since: check the current version at the source. Legal notice

Type: Guide
Published by: City of Markham
Date: January 1, 2025
For: designer
Building types: All building types
Pages: 2
Instruments: CSA C22.2 No. 0.3, Test Method For Electrical Wires and Cables

Overview

Markham's Builder Tip No. 16, dated January 1, 2025 and updated to the 2024 OBC, the first of the City's tips for non-housing projects permitted under the 2024 Ontario Building Code. It lists the articles on wires and cables in combustible and noncombustible construction, computer room floors, plenums and Part 9 wiring, and its objective explains testing of combustible-jacketed cables to CSA C22.2 No. 0.3, the FT1, FT4 and FT6 markings, other markings such as CMP and CMG, and a cable standards reference table from Conwire.

What it covers

3.1.4. Combustible Construction
3.1.4.3. Wires and Cables
3.1.5. Noncombustible Construction
3.1.5.21. Wires and Cables
3.1.5.25. Wires in Computer Room Floors
3.6.4.3. Plenum Requirements
9.34.1.5. Wiring and Cable
Objective

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