Ontario Electrical Safety Code

» Purchase the Code

» Guidelines & Reports

» Bulletins

» Flash Notices

Ontario Electrical Safety Code, Ontario Regulation 164/99

The Ontario Electrical Safety Code, Ontario Regulation 164/99, is comprised of the Canadian Electrical Code Part I (CEC) together with specific Ontario Amendments. Development of the Canadian Electrical Code Part I is led by the Canadian Standards Association (CSA). It is developed in close consultation with volunteer technical committees and subcommittees reflecting expertise from across Canada, including ESA. After review, the provincial government then adopts the CEC, with additional amendments specific to Ontario.

The Ontario Electrical Safety Code is mostly a technical document and is prescriptive in approach. The Code describes the standards for electrical installations, products and equipment in Ontario in detail.

You can decrease the risks of fire, shock, and electrocution by taking steps to ensure those who perform electrical work are qualified, competent and licensed.

Ontario Electrical Safety Code (27th edition/2018)

ESA collaborated with its safety partners on the 2018 edition of the Ontario Electrical Safety Code. The Minister of Government and Consumer Services approved the adoption of the new Code, which came into effect May 16, 2019. Electrical work conducted after this date must meet its requirements.

The 27th edition of the Ontario Electrical Safety Code includes the Canadian Electrical Code, Part 1, plus Ontario-specific amendments. The Code reflects changes in technology and the market, feedback from stakeholders and technical reviews, and new safety insights.

Changes aimed at improving electrical safety and protecting workers and the public include:

  • A re-write of Section 10 requirements for bonding and grounding. These have been reorganized and reduced in size. Some changes will improve safety and simplify the installations;
  • Expanded use of tamper-resistant receptacles in educational facilities and hotels/motels;
  • A requirement to install an identified (neutral) conductor at each control (switch) location of permanently installed luminaire;
  • Alignment with the Ontario Building Code to prevent the installation of high-voltage conductors over buildings;
  • Providing adequate working space for electrical workers to repair, maintain and install transformers greater than 50kVA;
  • Banning the installation of cables in concealed locations in corrugated roof decking;
  • Adding requirements for Energy Storage systems; and
  • Advancing the use of power over ethernet as a pathway for sources of electricity.

View the Ontario-specific amendments in the 27th Ontario Electrical Safety Code.

ESA has partnered with the CSA Group to offer the Code book and all ESA bulletins for one price. The bulletins provide important updates and interpretations. The package is available in print for $219 or in searchable, digital format for $195. The digital format is accessible on smart phones, tablets and desktops and is compatible with Windows and iOS. (Please note: Bulletins are available online. After buying the Code book, register at CSA Communities for access to them.)