Construction Electrician (309A)
Install, maintain, and repair electrical systems in residential, commercial, and industrial settings.
A Red Seal endorsement is a seal on your provincial or territorial trade certificate. It shows you have the knowledge and skills to practice your trade across Canada — earned by passing the interprovincial Red Seal exam.
What this trade covers
Construction electricians plan, assemble, install, test, troubleshoot and repair electrical wiring, fixtures, control devices and related equipment in buildings and other structures.
Exam format
- • 100 multiple-choice questions
- • 4-hour time limit
- • 70% required to pass
- • Open-book (CEC, WHMIS permitted)
- • Open-book — Canadian Electrical Code (CEC) reference permitted
- • Questions align with the Red Seal Occupational Standard (RSOS) for Construction Electrician
Question types
Every question has one correct answer and three incorrect options — not trick questions, but distractors are not always obvious.
- Knowledge and recall15–25%
- Procedural and application60–70%
- Critical thinking10–20%
Exam blueprint (RSOS)
Questions are distributed across major work activities defined in the Red Seal Occupational Standard — the same breakdown used on the official exam.
Performs common occupational skills
Installs, services and maintains generating, distribution and service systems
Installs, services and maintains wiring systems
Installs, services and maintains motors and control systems
Installs, services and maintains signalling and communication systems
Sample question
Knowledge & recall[Demo] recall question for Installs and maintains branch circuits (309A)
- A. Option D
- B. Option A
- C. Option C
- D. Correct answer
Explanation: Based on CEC-2024 requirements for Installs and maintains lighting and power systems.
Official Red Seal resources
Source material from the Red Seal Program — administered by the Canadian Council of Directors of Apprenticeship (CCDA).