The Ontario Electrical Safety Code (OESC) is the technical document that defines standards and legal requirements for electrical installations in the province of Ontario. Published by the Electrical Safety Authority (ESA) – Ontario’s electrical safety regulator and administrative authority – the OESC is developed through consultations of expert members at the provincial and national level. Updated every three years, this latest edition is now in effect, and as of May 16th, 2019 will be enforced in the province.
Electronic copy of this product accessible with the Adobe Reader program.
Ontario Electrical Safety Code (OESC), 27th Edition – 2018 (PDF)
Prescriptive in approach, the Ontario Electrical Safety Code is an essential tool of the trade and describes the standards for safe electrical installations in detail. Includes access to ESA Bulletins.
Printed hard copy version of this product.
Ontario Electrical Safety Code (OESC), 27th edition – 2018 (Paper)
The paper format of the Ontario Electrical Safety Code is an essential tool of the trade and describes the standards for safe electrical installations in detail.
A powerful app-based version of this product with enhanced navigation, markup capabilities, diagrams and animations.
Ontario Electrical Safety Code (OESC), 27th edition – 2018 (eBook)
In addition to the Code book, access important updates, rule interpretations, and ESA Bulletins right from your desktop, mobile device or web browser.
Key Changes in the 2018 Edition:
The 2018 edition of the Code includes the Canadian Electrical Code, Part I plus several Ontario-specific amendments. This new edition includes changes designed to enhance electrical safety and protect workers and the public including:
- Requirements for bonding and grounding in Section 10 have been reorganized and reduced in size with some changes that will improve safety and simplify the installations;
- Expanding the use of Tamper-resistant receptacles in educational facilities and hotels/motels;
- Requirements for installing an identified (neutral) conductor at each control (switch) location of permanently installed luminaire;
- Greater alignment with the Ontario Building Code to prevent the installation of high-voltage conductors over buildings;
- Providing of adequate working space for electrical workers to undertake necessary repairs, maintenance and installation of transformers greater than 50kVA;
- Prohibiting of installation of cables in concealed locations in corrugated roof decking;
- Adding requirements for Energy Storage systems and
- Facilitating the use of Power over Ethernet to provide a pathway for sources of electricity.
Join CSA Communities to Receive ESA Bulletins
OESC bulletins and their updates are included as part of your purchase of the 27th edition over the entire 2018 Code cycle. To receive bulletins and to receive notifications when new bulletins are released, create a CSA Communities account.Join CSA Communities to get started