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Ontario Electrical Safety Code (OESC) 27th Edition

Ontario Electrical Safety Code 27th Edition

Please be advised that an unintended omission from the Canadian Electrical Code (CE Code) has been identified. Due to this oversight, ESA is reinstating the existing Ontario Electrical Safety Code version of Rule 10-808 in its Recommendation to the Ministry of Government and Consumer Services. It is included as Rule 10-611 Installation requirements for bonding conductors.

Rationale: During the CE Code approval process led by the Canadian Standards Association (CSA), Rule 10-808 (installation requirements for bonding conductors) was unintentionally excluded from the final Section 10 approval document at the national level (CSA).  

During the development of the 2018 Edition of the CE Code, Section 10 was rewritten and reconfigured in an intuitive and user-friendly format. During this process, Rule 10-808 was unintentionally excluded in the final version and, as a result, the CE Code 2018 (national-level) does not contain the safety requirements related to the installation of bonding conductors. 

This Rule was originally introduced in the CE Code in 1972 and has evolved over time as required.  The Rule was initially introduced to set important safety requirements regarding the installation of equipment bonding conductors.

CSA is taking steps to correct this unintended omission through a proposal to restore this requirement for CE Code 2021. In the meantime, to mitigate risks associated with this gap in guidance, ESA has included the 2015 version of Rule 10-808 in the CE Code as an Ontario-specific amendment.

Rule 10-808 has been renumbered to Rule 10-611 in the 2018 Ontario Electrical Safety Code.


Consultation Feedback

ESA thanks all stakeholders who submitted comments and feedback during the public consultation for Ontario Amendment (OA) proposals.

The below resolution sheet reflects the comments received along with resolution. The revised proposal drafts are based on ESA’s review of the feedback received during the public consultation and discussion with Ontario Provincial Code Committee (OPCC).

OESC 27th Edition: Public Consultation Feedback and Resolution

Once the overall adoption of the Ontario Electrical Safety Code (OESC) “27th edition” is endorsed by ESA’s Board of Directors, The proposed changes will be submitted to the provincial Government for review and approval.

ESA is recommending to the provincial Government that the OESC 27th edition come into effect May 2019.

The Electrical Safety Authority (ESA) is reviewing the Ontario Electrical Safety Code (OESC) requirements to ensure the regulatory framework provides the appropriate balance between the need to ensure safety and supporting modernization and eliminating unnecessary encumbrance on industry.

ESA sought the views of contractors, consumers, businesses and other stakeholders on all proposed amendments to the Ontario Electrical Safety Code. The consultation ran from Tuesday March 6 to Friday April 20, 2018.


Proposed Ontario Amendments

Proposal Number Rule Description of Change Proposed by
2018-OA-001 2-005(h) New Application for inspection not required for elevating devices Electrical Safety Authority
2018-OA-002 Section 2 Replace “inspection department” with “Authority” Electrical Safety Authority
2018-OA-003 Section 2 Change “Application for Inspection” to “Notification” and others Electrical Safety Authority


Clarification to exemptions from an application for inspection a notification Electrical Safety Authority


Add requirements for Plan Review of energy storage installations and of standby generation that supports life safety loads Electrical Safety Authority
2018-OA-006 2-010 Editorial change to clarify when plan review is not required Electrical Safety Authority
2018-OA-007 2-022(3) and Appendix B Note Amend requirements for lighting equipment approval Electrical Safety Authority
2018-OA-008 10-116(6) Relocate Ontario amendment about the use of a metal frame of a building as a grounding conductor. Electrical Safety Authority
2018-OA-009 12-022 New Requirements for cables and raceways installed in metal corrugated roof decking Electrical Safety Authority
2018-OA-010 16-222 and Appendix B Note Amend requirements for equipment connected to Class 2 circuits  Electrical Safety Authority
2018-OA-011 24-104(2) Delete current Ontario Amendment to Rule 24-104(2) Electrical Safety Authority
2018-OA-012 26-724 Delete current Ontario Amendment to Rule 26-724(f)(i) (2015) Electrical Safety Authority
2018-OA-013 28-500(4) and Appendix B Note New Add new requirement for use of manual motor controllers not suitable as disconnecting means Office of the Chief Coroner & Ontario Forensic Pathology Service
2018-OA-014 30-200(1) Delete existing Ontario Amendment to CE Code Rule 30-200(1) Electrical Safety Authority
2018-OA-015 Rule 64-000 and 64-900s New Include energy storage systems in Section 64  Electrical Safety Authority
2018-OA-016 68-072 New Add new requirement for disconnecting means for pools and hot tubs Electrical Safety Authority
2018-OA-017 75-904 Amend Specification 41 to include height requirements for a pole mounted transfer device Electrical Safety Authority
2018-OA-018 Appendix A Amend Appendix A as non-mandatory Electrical Safety Authority
2018-OA-019 Appendix B Note to Rule 2-024 Amend to recognize other certification bodies Electrical Safety Authority
2018-OA-020 78-000, 78-200 to 78-210 and 78-052 Delete current Ontario Amendment to Rules 78-000 and 78-200 to 78-210, and amend Rule 78-052 (CE Code 2018) to clarify GFCI requirements for branch circuits Electrical Safety Authority
2018-OA-021 30-1400 and Appendix B Note Clarification that Rules 30-1402 to 1410 apply to LED luminaires supplied by Power over Ethernet Electrical Safety Authority
2018-OA-022 26-656 New Increased AFCI requirements in dwelling units Electro Federation Canada
2018-OA-023 30-1009 New Clearances of poles supporting luminaires Electrical Safety Authority
2018-OA-024 30-1300 Amend requirement for Roadway lighting systems near distribution lines Electrical Safety Authority
2018-OA-025 16-310 and 16-330 (8) New Amend ampacity rating of Power over Ethernet (PoE) source equipment Peter Olders, Ontario Electrical Industry Training Trust


Backgrounder and Consultation Instructions