Ontario Electrical Safety Code (25th Edition) Becomes Effective May 1, 2012

Ontario Electrical Safety Code (25th Edition) Becomes Effective May 1, 2012 


On May 1, 2012 the 25th edition of the Ontario Electrical Safety Code (OESC) will come into effect.  This edition includes amendments that reflect changes in technology, the need to harmonize Codes, electrical incidents data and reflects input from consultations with key stakeholders.  Key changes in this edition include:


·        Expansion of the Basic exemptions (Rule 2-005) that define the requirement for an application for inspection. This change, which increases the association between permit requirements and electrical safety risk, reduces the burden on the public and increases harmonization with other Canadian jurisdictions.


·        Connection Authorization expiry (Section 2) establishes a requirement for connection of a service within six months from the date of issue. This change addresses customer and Distributor safety concerns raised where a de-energized service has been left for more than a six-month period.


·        Conductor Ampacity Changes (Section 4) introduces harmonization of ampacity tables with the IEEE (Institute of Electrical and Electronics Engineers) and U.S. National Electrical Code. These tables determine the required conductor size.


·        Receptacle(s) on a roof top for equipment maintenance (Sections 2 & 26) will improve worker safety by providing receptacles where there is a need to maintain or service roof top air conditioning or similar equipment. 

·        Receptacles exposed to weather(Section 26)  amends Rule #26-702 to require 15A and 20A (125V and 240V) receptacle be provided with cover plates that provide shielding with or without a plug inserted into the receptacle that are suitable for locations that are exposed to wet weather conditions.

·        Renewable energy (New Section 64) and Solar photovoltaic systems (Section 50) are being supported with the introduction of a new section that addresses requirements for electrical installations associated with renewable energy generation (including wind energy, hydroelectric and solar).

·        Electric vehicle charging infrastructure (Section 86) the introduction of new and enhanced rules to accommodate electric vehicle charging systems installations.

  For more info please visit the ESA website: http://esasafe.com/Corporate/ontario_electrical_safety_code_25th_edition_2012.php