Canadian Manufacturing

New Ontario electrical safety code enforced in May

All electrical installations in Ontario legally required to follow the code

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—Sponsored article by CSA Group

The newly-updated Ontario Electrical Safety Code (OESC) was enforced by the Ontario provincial government on May 5.

The OESC defines standards and legal requirements for electrical installations in Ontario. All electrical installations in the province are legally required to adhere to the code.

Prescriptive in approach, the code—updated every three years to keep pace with new technologies and industry needs—is an essential tool of the trade and describes the standards for safe electrical installations in detail.

It’s developed with safety partners and helps decrease the risk of injuries and costly re-works of electrical installation projects.

Key changes to the 2015 OESC align with revisions to the 23rd edition of the Canadian Electrical Code (Part I) and changes specific to Ontario. The new edition is available in print, digital and PDF formats.

Highlights and key changes

Below are some of the 200 revisions and changes to the OESC:

• Now includes access to electrical safety authority bulletins for important updates and rule interpretations;
• Contains major changes to content on renewable energy, electrical heating and hazardous locations;
• Details expanded requirements for arc fault circuit interrupters in homes;
• Includes changes to hazardous area classifications and zone requirements that will affect your installations and potentially save money;
• Clarifies and provides guidance on clearances between lighting fixtures and nearby combustible material;
• Outlines revised requirements for wiring at non-commercial docks;
• Aligns with TSSA requirements for propane storage and vehicle refueling;
• Introduces new requirements for the installation of LED in residential occupancies;
• Covers requirements for location of supply connections in parking lots for recreational vehicles.

Learning the code

Published by the Electrical Safety Authority (ESA)—Ontario’s electrical safety regulator and administrative authority—the OESC is developed through consultations with expert members at the provincial and national level.

Electricians in Ontario need to know and follow the OESC. CSA Group—in conjunction with training partners—will soon offer the updated Online Pre-Master Electrician Course, designed to expand the knowledge and skills of electricians and assist electricians and others to prepare for the Master Electrician Examination – which is administered by ESA

The course will reference specific sections of the OESC, other pertinent legislation, electrical calculations, and trade and business practices.

CSA Group’s broad training offerings can help keep employees safe through enhanced workplace electrical safety, provide guidance on risk management, and direction on how to implement a range of management systems.

To learn more about the Ontario Electrical Safety Code, and CSA Group’s range of on-site, in-class and online installation and safety training courses, visit CSA Group at

CSA Group is an independent organization dedicated to safety, social good and sustainability. CSA certification marks appear on billions of qualified products worldwide.

To view more articles on workplace safety, business strategy and industry standards, see the Safety & Sustainability Success Centre.

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