Master Electrician CEC Exam Prep
1,000 practice questions across 8 full-length tests
Aligned to the Canadian Electrical Code 2024 (Part I)
Detailed answer explanations — not just an answer key
Canadian exam simulation in every test
| Knowledge Domain / Major Work Activity | Number of Questions |
|---|---|
| CEC Section 0–4: General requirements, definitions, protection and grounding CEC Section 6–14: Services, conductors, branch circuits, feeders and overcurrent CEC Section 16–28: Class 1 and 2, communication, motors, transformers CEC Section 30–46: Hazardous locations, lighting, life-safety, mobility CEC Section 50–86: Renewable energy, EVSE, special locations Electrical theory and calculations Electrical contracting law and business Total | 20% 25% 20% 12% 8% 10% 5% 100% |
Source: Canadian Electrical Code Part I, 2024 edition (CSA C22.1-24), and provincial Master Electrician exam blueprints. This is a study aid. Red Seal Training Academy is not affiliated with CSA or any provincial electrical safety authority.
Which Path Are You On?
Journeyperson writing the Master exam
You hold your Construction or Industrial Electrician ticket and now want to qualify as a Master Electrician so you can hold an electrical contracting license. Use our 8 full-length tests to drill the CEC under exam conditions.
Existing contractor moving province
You hold a Master Electrician license in one province and need to write the exam to operate in another. Our book covers the current CEC across all provincial editions. Confirm any provincial CEC amendments with your local authority before exam day.
Re-testing after a previous attempt
If your last attempt did not go the way you wanted, use our detailed answer explanations to fix the knowledge gaps, not just memorize answers. Every question in the book has a written explanation.
Try 3 Free Sample Questions
One question of each type you will see on the real exam. Scroll to see the answer and explanation.
Per CEC 2024 Section 4, what is the minimum size of a copper grounding electrode conductor for a 200 A service?
A. No. 6 AWG
B. No. 4 AWG
C. No. 3 AWG
D. No. 2 AWG
Answer: B
Explanation:
Per CEC Table 17 (referenced from Section 4), the minimum copper grounding electrode conductor for a 200 A service is No. 4 AWG. Aluminum requires No. 2 AWG. Always confirm against the specific edition of the CEC in force in your province — provincial amendments occasionally change minimum sizes.
A 30 metre underground feeder run uses 3-conductor RW90 copper cable in PVC conduit. What CEC table is used to determine the ampacity?
A. Table 1 (free air)
B. Table 2 (raceway)
C. Table 4 (cable in raceway)
D. Table D11 (underground)
Answer: B
Explanation:
Before applying power, megger (insulation resistance test) the motor windings and confirm wiring against the drawings. This catches damaged insulation, miswired terminals, and ground faults that would otherwise destroy the motor and drive on first start. Powering up first is a recipe for blown drives, faulted contactors, or worse.
An electrical contractor proposes to install a 200 A residential service using 2/0 AWG aluminum service entrance conductors. The homeowner is concerned. What is the correct response based on the CEC?
A. 2/0 AWG aluminum is undersized and the install would not pass inspection
B. 2/0 AWG aluminum is the standard size for a 200 A residential service per CEC Table 4
C. Aluminum is not permitted for residential service entrance
D. Only copper is permitted at 200 A
Answer: A
Explanation:
Voltage unbalance is the most common cause of motor overheating with current at or below FLA. As little as 1% voltage unbalance can cause 6-10% current unbalance and disproportionately high winding heating. NEMA recommends a maximum of 1% voltage unbalance for motor service. Confirm by measuring all three phase voltages at the motor terminals and comparing to nameplate.
Our book has 1,000 questions like these, with an explanation for every one.
Master Electrician Provincial Authority Exam — Frequently Asked Questions
What is a Master Electrician?
Do I need a Red Seal to become a Master Electrician?
Most provinces require a valid journeyperson Construction Electrician (309A) or Industrial Electrician (442A) certificate. The Red Seal endorsement is not always required but is recommended. Some provinces also accept equivalent training and experience. Check your provincial authority for exact requirements.
What edition of the CEC is used on the exam?
The exam is aligned to the Canadian Electrical Code edition adopted in your province, plus any provincial amendments. CEC 2024 (CSA C22.1-24) is the current edition. Most provinces adopt new editions within 12-18 months of publication. Confirm with your provincial electrical safety authority.
How many questions are on the exam and what is the pass mark?
Length and pass mark vary by province. Most provincial exams are 100-150 multiple-choice questions over 3-4 hours, with a pass mark of 70%. Some include a separate practical or oral component. Confirm with your provincial authority.
Can I bring my CEC code book into the exam?
Yes — most provincial Master Electrician exams are open-book to the CEC and provincial amendments. No other notes or reference materials are typically permitted. The exam tests your ability to navigate the code book efficiently, not memorize it.
Is the Master Electrician license the same as a Master Electrician contracting license?
Closely related but not identical. The Master Electrician individual qualification is the personal credential. An electrical contracting license is the business permit a company holds, and most provinces require at least one Master Electrician on staff to issue this license. Some provinces issue both at once; others separate them.