MarkhamBuilding InspectionsInspections
Clearance To Electrical Conductors
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
- Also called
- Clearance to Electrical Conductors
- For
- designer
- Building types
- All building types
- Pages
- 4
- Instruments
- CAN/CSA-C22.3 No.1, Overhead Systems
Overview
Markham's Builder Tip No. 84, dated January 1, 2025 and updated to the 2024 OBC, on building near overhead power lines; the City files it with its housing tips under the 2024 Ontario Building Code. It quotes Article 3.1.20.1., Clearance to Buildings, with horizontal clearances of 1 m, 3 m and 3.7 m by voltage, CAN/CSA-C22.3 No.1 above 69 kV and an assumed 1.8 m conductor swing, plus Article 9.1.1.5. for Part 9 buildings and Sentence 3.15.5.2.(4) for exterior signs. A diagram titled Overhead Power Line Clearance shows a balcony.
What it covers
- 3.1.19. Above Ground Electrical Conductors
- 3.1.20.1. Clearance to Buildings
- 9.1.1.5. Proximity to Existing Above Ground Electrical Conductors
- 3.15.5.2. Clearance for Exterior Signs
- Objective
- Overhead Power Line Clearance
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