Ontario Electrical Safety Code (28th edition/2021)
The 2021 edition of the Ontario Electrical Safety Code (OESC or “the Code”) came into effect May 5, 2022.
The 28th edition of the Code includes the Canadian Electrical Code, Part 1, plus Ontario-specific amendments.
The 2021 edition of the OESC includes changes designed to enhance electrical safety and protect workers and the public, including:
- Provide requirements to support reduction in the potential for fires and the loss of animals in buildings housing livestock.
- Provide clear electrical safety installation requirements for Energy Storage Systems (ESS), and harmonize with other codes and standards.
- Requiring GFCI protection for all outdoor receptacles to mitigate the potential for electrical shock hazard
- Introduce guidance to electrical installations in flood hazard zones and when electrical equipment has been exposed to water to mitigate the potential risks.
- Keeping workers safe by requiring additional receptacle for mobile structures connected to transfer equipment.
- In Ontario, mitigate the potential for shock or electrocution when structures are erected in close proximity of customer owned powerlines.
- In Ontario, keep the reduced conductor sizes for services and feeders for dwelling units by following the current installation practice.
More information
Director's Order: Ontario Electrical Safety Code 28th Edition
2021 Ontario Amendments to the Canadian Electrical Code Part I, C22.1
2021 Modifications de l’Ontario au Code canadien de l’électricité, Première partie, C22.1
Q&A for Amendments to the Ontario Electrical Safety Code 28th Edition
2021 Ontario Amendment Consultation (for information purposes only)