Electrician — Construction and Maintenance (trade code 309A) is one of Ontario's most popular apprenticeships. It is also a compulsory trade, so the path is clearly defined: you register as an apprentice, complete your hours and in-school training, then pass the certifying exam. This guide walks through each step using Skilled Trades Ontario's official figures.
What "compulsory" means for you
In Ontario's compulsory trades you can only do the work if you hold a valid Certificate of Qualification, a Provisional Certificate of Qualification or a Registered Training Agreement (Skilled Trades Ontario). In practice that means you can't simply get hired as an "electrician's helper" and do electrical work indefinitely. You need to be registered as an apprentice. 309A is also listed as hours-based, which means you must complete the full prescribed on-the-job hours, and a 1 journeyperson to 1 apprentice ratio applies.
There is a separate, shorter trade, Electrician — Domestic and Rural (309C, 7,200 hours), and a non-compulsory Industrial Electrician trade (442A). Make sure the apprenticeship you sign matches the work you want to do.
Step 1: Meet the entry requirements
Skilled Trades Ontario lists Grade 10 (or equivalent) as the minimum academic standard for 309A. Employers often prefer Grade 12 with math and science, because the in-school training includes a lot of electrical theory and Canadian Electrical Code work. If you're still in high school, ask your guidance office about the Ontario Youth Apprenticeship Program (OYAP).
Step 2: Build skills that get you hired
- Consider a college pre-apprenticeship or electrical techniques program. They teach fundamentals and show employers you're committed.
- Get common safety training (Working at Heights is required for many Ontario construction jobs, plus WHMIS and first aid). See our safety tickets guide.
- Brush up on algebra, Ohm's law and basic circuits. Our trade calculators are a good way to practise.
Step 3: Find a sponsor
You need an employer (or union training program) willing to sponsor you. Electrical contractors, maintenance departments and IBEW locals all take apprentices. Browse current electrician jobs from Job Bank on our board, and read our apprenticeship guide for how sponsorship and registration work.
Step 4: Register and track your hours
Once you have a sponsor, you sign a Registered Training Agreement. Keep your own records of hours and the logbook skills your trainer signs off. Our free apprenticeship hours tracker can help.
Step 5: Complete in-school training
The 309A program has four levels of in-school training, totalling 1,050 hours on Skilled Trades Ontario's current chart. Training is usually delivered in blocks at a college or union training centre. You may be eligible for Employment Insurance during full-time blocks. Apply through Service Canada as soon as your dates are confirmed.
Step 6: Write the Certificate of Qualification exam
When you finish your hours and training, you write the certifying exam. Because 309A is a Red Seal trade, passing gives you an Ontario Certificate of Qualification with the Red Seal endorsement. The Red Seal Construction Electrician exam has 100 multiple-choice questions, and the pass mark is 70%. Exam scheduling is handled by Skilled Trades Ontario. Our Red Seal exam guide covers the breakdown and study approach, and you can try a free 15-question electrician sample.
Journeypersons in compulsory trades must renew their Certificate of Qualification each year.
What electricians earn
Job Bank's 2025 wage data for NOC 72200 (Electricians, except industrial and power system) shows a median of $34.00/hour in Ontario and $35.00/hour nationally (Job Bank wages open data, 2025). Apprentices earn a percentage of the journeyperson rate that rises as they progress. See the full numbers on our Construction Electrician trade guide.
Checklist
- Confirm 309A (or 309C/442A) is the right trade for you
- Meet the Grade 10 minimum (Grade 12 math helps)
- Get Working at Heights and other common tickets
- Find a sponsor and sign a Registered Training Agreement
- Complete 9,000 hours, including 4 levels of school
- Pass the certifying exam (70%) and renew your C of Q each year
Frequently asked questions
How long does it take to become an electrician in Ontario?
The 309A program is 9,000 hours, including 1,050 hours of in-school training. Working full time, most apprentices take about five years. Because the trade is hours-based, you can't finish early by showing competency. You need the full hours.
Can I work as an electrician without an apprenticeship in Ontario?
Not doing 309A work. It's a compulsory trade, so you need a Registered Training Agreement, a Certificate of Qualification or a Provisional Certificate of Qualification. People with electrical experience from another province or country can look into Skilled Trades Ontario's Trade Equivalency Assessment.
Do I need Grade 12?
Skilled Trades Ontario's minimum is Grade 10, but many sponsors prefer Grade 12, especially with math. If you're missing courses, adult high-school credits or a college academic upgrading program can fill the gap.
Is a college program required?
No. A pre-apprenticeship or electrical techniques diploma is optional. It can make you easier to hire and may give you some credit toward in-school training. Ask the college how its program maps to the 309A levels before you enrol.
What's the difference between 309A and 309C?
309A (Construction and Maintenance) covers the full range of electrical work in buildings and structures and is a Red Seal trade. 309C (Domestic and Rural) is a 7,200-hour compulsory trade focused on residential and farm work and isn't Red Seal. Many apprentices choose 309A for the wider scope.
Does the Red Seal help if I move?
Yes. The Red Seal endorsement is recognized in every province and territory where the trade is designated, which makes it easier to work outside Ontario.
This article is general information for people exploring trades careers in Canada. Rules, programs and amounts change and differ between provinces and territories — confirm details with your apprenticeship authority and official government sources.