How to Choose an Electrical Contractor
When it comes to having electrical installations, maintenance, or repairs performed, it’s not all about price. The quality of the work is important.
Substandard work is not only inefficient, and can lead to further expenses if it needs to be updated or corrected, but poor electrical work can be dangerous.
Incorrectly installed electrical systems can pose fire or electrical shock hazards that could result in expensive property loss or injuries to employees.
To help you choose a contractor that will perform safe, high-quality electrical installations, maintenance, and repairs for you, here are three keys to evaluating an electrical contractor.
Electrical Safety Authority (ESA) certification
The first thing to check if you’re considering an electrical contractor is their Electrical Safety Authority (ESA) license. The ESA inspects the work of electrical contractors and ensures that it is safe and complies with current electrical codes.
To obtain and maintain an ESA license, an electrical contractor must meet established standards of training, conduct, and performance. Electrical contractors must meet the minimum education and training requirements to be licensed by the ESA, and have the ESA inspect their work.
Additionally, the ESA provides ongoing training, and regularly updates the electrical code to improve the skills of ESA certified contractors, and improve the efficiency and safety of any work approved by an ESA inspector.
A certified electrical contractor should be willing and ready to provide their ESA license number.
Authorized Contractor Program (ACP) membership
The Authorized Contractor Program (ACP) is an extension of the ESA certification for experienced electrical contractors. To be part of the ACP, an electrical contractor must consistently perform work that complies with the Ontario Electrical Safety Code (OESC).
As part of the ACP, an electrical contractor will receive selective inspections of certain routine operations, rather than having one hundred percent of their jobs inspected.
Additionally, contractors who are members of the ACP may obtain pre-authorized service reconnection for regularly performed electrical installations.
The Authorized Contractor Program streamlines the inspection process for reliable, experienced electrical contractors.
Ontario Electrical League (OEL) membership
The Ontario Electrical League (OEL) was established to maintain and improve the integrity of licensed electrical work in Ontario.
Members of the OEL are committed to mastering and improving the electrical contractor’s trade. This means that an OEL contractor is more interested in providing the highest quality work and the best customer experience, than beating the competition.
One of the key points of the OEL code of conduct is to be respectful and welcoming of fair competition, to ensure that the customer’s best interests are always the focus of work.
Membership in the OEL is voluntary, and indicates that an electrical contractor is confident in their work, and realizes that their customers are their most valuable assets.
At the end of the day, a skilled electrical contractor will have the credentials to back up their claims.
When you’re evaluating an electrical contractor, don’t be shy about asking to see their certifications and what organizations they’re part of.
If you’re interested in finding out more about what a properly certified electrical contractor can do for you, get in touch with us at or call us at (519) 623-9618.
Diamond Controls is a fully accredited electrical contractor operating in Ontario.


  1. Latoya Anderson on February 5, 2018 at 11:19 PM said:
    The best part of your article for me is when you talked about the importance of choosing an electrical contractor that has Electrical Safety Authority (ESA) license to ensure that their works are being inspected for safety and compliance reasons. It has been a week since my mom told me that she wanted to update the electrical system of her home. She wanted to make sure that the new electrical wirings are going to be installed in the most effective and safest way. It will make sense for her to only deal with an electrical contractor that's ESA licensed to have peace of mind that the job is going to be done right. Thanks for sharing your tips!
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