What is on the 442A Industrial Electrician Red Seal exam.

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01What is the 442A Industrial Electrician Red Seal exam?

It is the national certification exam for the trade that the Red Seal Program calls Industrial Electrician. 442A is Ontario's trade code for it, and Ontario also uses the name Industrial Electrician. Quebec calls the trade Electrician and the Northwest Territories Electrician (Industrial). You will also see it called the interprovincial (IP) exam or, in Ontario, the certifying or C of Q exam. These all name the same sitting: one interprovincial Red Seal exam.

The content is set nationally. According to the Red Seal Exam Preparation Guide, tradespeople from across Canada decide what goes into the trade's Red Seal Occupational Standard, write and review every exam question, and decide how many questions each section gets. The exam is then administered by the provincial and territorial apprenticeship and certification authorities; in Ontario that is Skilled Trades Ontario.

The format is the same as every Red Seal exam: multiple choice, four options (A to D), one correct answer, one mark per question and no penalty for a wrong answer. The Industrial Electrician exam has 100 questions and the writing time is four hours, about 2 minutes 24 seconds per question. The pass mark is 70 per cent, so you need 70 correct answers and can miss 30.

The standard behind the exam is the 2021 Red Seal Occupational Standard for Industrial Electrician (catalogue number Em15-3/7-2021E-PDF). When we checked on October 3, 2026, the Red Seal site showed no new exam under development for this trade. The preparation guide stresses that the exam covers the trade across Canada at the journeyperson level, not only the work you do: an electrician who spends every shift on drives and PLCs will still see questions on fire alarm, cathodic protection and high-voltage switchgear.

02What is on the Industrial Electrician exam?

The Red Seal Program publishes how many questions come from each major work activity. For Industrial Electrician the 100 questions break down like this.

With 100 questions, each block's count is also its percentage. Block B, generating, distribution and service systems, is the heaviest at 23. Block D, motors, starters, drives and other fixed equipment, follows at 21, then Block C, wiring systems, at 20. Those three are 64 of the 100 questions. Process control, Block F, has 17, so the motor and automation blocks D and F together carry 38. The lightest are Block E, signalling and communication, at 10 and Block A, common occupational skills, at 9.

The block titles above are the ones the exam information page and the Self-Assessment Guide use. The 2021 standard words two of them a little differently (generating, transmission, distribution and service systems for B, and rotating and other fixed equipment and control systems for D), and some task names on the exam information page are older wordings of the standard's. The question counts are the same in all three documents.

03What does each block cover?

The task names below are the ones the 2021 standard lists under each major work activity, with the number of questions the Red Seal Program assigns to each. The standard has 31 tasks and 112 sub-tasks, and questions are written to the sub-tasks. One task carries no questions: uses communication and mentoring techniques (A-6), whose two sub-tasks are not common core, which leaves 110 testable sub-tasks. The largest single task is installing and maintaining input/output (I/O) devices (F-29) with 8 questions, then motor starters and control devices (D-22) with 7, and motors (D-25) and automated control systems (F-30) with 6 each.

Block A: Common occupational skills (9 questions)

Five tested tasks. Performs safety-related functions (2 questions) covers a safe work environment, PPE and safety equipment, lock-out and tag-out, and identifying environmental conditions. Uses tools and equipment (2) covers common and specialty tools, access equipment, and rigging, hoisting and lifting equipment. Organizes work (2) covers interpreting plans, drawings and specifications, identifying hazardous installations, materials and supplies, planning project tasks, preparing the location in the facility and finalizing documentation. Fabricates and installs support components (1) includes seismic restraint systems. Commissions and decommissions electrical systems (2) covers commissioning, shutdown and start-up procedures, and decommissioning.

Free block A practice questions: Safety & Commissioning →

Block B: Generating, distribution and service systems (23 questions)

Nine tasks. Utility and non-utility supply services and metering equipment, single-phase and three-phase (3 questions). Protection devices (4): overcurrent, ground fault, arc fault and surge, and under- and over-voltage protection. Low-voltage distribution systems (3), from panels and switchboards to breakers and fuses. Power conditioning systems (2), which the standard describes as filters, capacitors and line reactors used to reduce harmonics and correct power factor. Bonding, grounding and ground-fault protection and detection systems (3). Power generating and conversion systems (2): AC generating systems and DC generating and conversion systems. Renewable energy generating and energy storage systems (1). High-voltage systems (2). Transformers (3), from extra-low-voltage and low-voltage single-phase and three-phase units to high-voltage transformers.

Free block B practice questions: Distribution & Transformers →

Block C: Wiring systems (20 questions)

Six tasks. Raceways, cables, conductors and enclosures (5 questions) covers conductors and cables, conduit, tubing and fittings, raceways, and boxes and enclosures. Branch circuitry and devices (5) covers luminaires and wiring devices. HVAC electrical components (3) covers power connections to HVAC equipment and HVAC controls. Electric heating systems and controls (3). Exit and emergency lighting systems (2). Cathodic protection systems (2), which protect buried and submerged metal from corrosion.

Free block C practice questions: Raceways, Lighting & Heating →

Block D: Rotating and non-rotating equipment and control systems (21 questions)

Four tasks. Motor starters and control devices (7 questions); the standard's list of starters runs from line-voltage, two-speed and forward/reverse starters to soft starters and reduced-voltage starters. Drives (5), AC and DC. Other fixed equipment and associated controls (3), which the standard defines as welding equipment, electro-magnets, electrostatic precipitators and other non-rotating devices, and also welders, conveyors and x-ray equipment. Motors (6): single-phase, three-phase and DC.

Free block D practice questions: Starters, Drives & Motors →

Block E: Signalling and communication systems (10 questions)

Three tasks. Signalling systems (4 questions): fire alarm systems and security and surveillance systems. Communication systems (3), which the standard says include voice, data and video systems, CCTV, public address and intercom, and industrial data communication systems such as DeviceNet, Ethernet and Modbus over copper, coaxial and fibre optic cabling. Building automation systems (3), which tie HVAC, fire alarm, lighting and security together and may be integrated with automated control systems.

Free block E practice questions: Fire Alarm, Comms & Automation →

Block F: Process control systems (17 questions)

Three tasks. Input/output (I/O) devices (8 questions), discrete and analog: the standard's list of discrete devices includes pressure, proximity, level, motion, flow, temperature and vibration switches and start/stop stations. Installs, programs and maintains automated control systems (6), which the standard names as PLC, SCADA and DCS systems, and covers installing, maintaining, programming and optimizing system performance. Pneumatic and hydraulic control systems (3).

Free block F practice questions: PLCs & Process Control →

04What kind of questions are they?

The Red Seal Program describes the Industrial Electrician question mix as knowledge and recall 10 to 20 per cent, procedural and application 35 to 45 per cent and critical thinking 40 to 50 per cent. On 100 questions that is 10 to 20 recall questions, 35 to 45 procedural and 40 to 50 critical thinking. The critical thinking share is the joint highest of the fourteen trades we cover, level with Automotive Service Technician (310S).

The exam information page gives one example of each type. The recall example asks which type of interlock a dashed line between two motor starters shows on a schematic. The procedural example asks for the procedure for testing an HPS lamp socket for power. The critical thinking example asks for the available capacity of a bank of three 25 kVA transformers in delta after one fails and the bank is reconnected as an open delta, which you have to work out.

The Red Seal Exam Preparation Guide says procedural questions might include calculations and interpretations of diagrams or code books, and that some critical thinking questions are complex and need an analysis of the situation and more than one calculation. In this trade that means reading meter values, nameplates, schematics and ladder logic and working out a cause, a setting or a current. There are no trick questions, but the incorrect options are not always obvious.

05What do you get in the exam room?

The Red Seal Exam Preparation Guide lists what you are provided with: an exam booklet, a diagram booklet if one is required, a pencil and eraser, a calculator if needed, and a bubble sheet to record your answers. It also lists other reference material "if required": an acronym list, math formulas and code book information. Scrap paper is provided too.

For Industrial Electrician the exam information page publishes a formula sheet and an acronym list and says both will be provided with the exam sitting. The acronym list has 50 entries, among them AFCI, kAIC, LRA, MCC, PLC, RTD, SCR and VFD. You get the meaning of each acronym; you still need to know what the device does.

The code book. The exam information page does not mention a code book and names no edition of the Canadian Electrical Code. The preparation guide warns that if your trade has a code book, the exam will reference the national code book, and a question will not tell you that it is a code question. Several of the Program's published sample questions for this trade, such as the minimum box size for nine No. 10 AWG conductors and conductor sizing for a 125 hp motor, need code tables to answer. The provinces that publish their rules supply the code book where an exam needs one and do not let you bring your own: Skilled Trades Ontario provides a code book if you need one for your examination, and SkilledTradesBC states that the Canadian Electrical Code 2024 is the code book provided for this Red Seal exam from June 1, 2025. Ask your provincial or territorial office which edition you will be given, and practise finding rules and tables in that edition.

The guide's rules say no materials, bags, phones, watches or personal calculators in the room, and your province or territory may have rules of its own. More on the day itself is in what to expect on exam day.

06What is on the Industrial Electrician formula sheet, and what is not?

The sheet gives nine unit abbreviations (E for voltage, I for current, P for power, PF for power factor, R for resistance, hp, RMS, VA and W), three constants (the square root of 2 = 1.41, the square root of 3 = 1.73 and π = 3.14) and these formulas:

• Ohm's law and power: current = E ÷ R; power = I² × R, E² ÷ R, E × I × PF, and hp × 746 W; resistance = E² ÷ P.
• AC values: average current (full wave) = I(max) × 0.6365; RMS current = I(max) × 0.7071; peak = RMS × 1.41.
• Three-phase: line current = VA ÷ (E line × 1.73); delta line current = phase current × 1.73; wye line voltage = phase voltage × 1.73; total power and volt-amperes from line values (× 1.73) or phase values (× 3).
• Power factor: cosine of the angle, or true power ÷ apparent power.
• Transformers: turns ratio Np ÷ Ns = Ep ÷ Es = Is ÷ Ip; short-circuit current = secondary current ÷ percent impedance.
• Others: frequency = poles × speed ÷ 120; area of a circle = πr²; force = area × pressure.

That covers the core electrical calculations. It does not cover everything the exam can ask you to calculate. There is no voltage drop formula, no impedance or reactance formula, no slip formula, nothing for scaling a 4 to 20 mA signal, and no number-system conversions for PLC work. Know those relationships from memory. Two cautions about what is on the sheet: its constants are rounded (1.73 and 3.14), so expect answer options rounded to match; and the short-circuit formula uses the percent impedance as a decimal, so 5 per cent is 0.05. Rearranging frequency = poles × speed ÷ 120 gives a motor's synchronous speed, which the sheet does not print as a separate formula. Our free Ohm's law and power calculator and voltage drop calculator show the working for two of these.

07How is it different from the 309A Construction Electrician exam?

They are two separate Red Seal exams, each with 100 questions, built on two separate occupational standards. The Industrial Electrician standard describes a trade employed by utilities, electrical contractors and the maintenance departments of plants, mines, manufacturing facilities and other industrial establishments; for the other exam see the 309A Construction Electrician exam guide.

Many task names are shared between the two standards, but the weighting is not. The 309A exam puts 30 questions on wiring systems and has no process control block. The 442A exam puts 20 on wiring and 17 on process control: I/O devices, PLC, SCADA and DCS systems, and pneumatic and hydraulic controls. Its motor block also includes non-rotating equipment such as welders, electromagnets and electrostatic precipitators. The question mix differs too: critical thinking is 40 to 50 per cent of the 442A exam against 20 to 30 per cent of the 309A, and procedural questions are 35 to 45 per cent against 60 to 70.

The standard also names other occupations that overlap with the trade: powerline technicians, instrumentation and control technicians, electric motor systems technicians, HVAC technicians, telecommunications technicians and industrial mechanics (millwrights). Each is a separate trade with its own requirements.

08Which provinces have the Industrial Electrician Red Seal?

The Red Seal Program lists Industrial Electrician as a designated Red Seal trade in British Columbia, Manitoba, New Brunswick, Newfoundland and Labrador, Nova Scotia, the Northwest Territories, Ontario, Prince Edward Island, Quebec and Yukon. It is not designated Red Seal in Alberta, Saskatchewan or Nunavut, so this Red Seal exam is not offered there. If you work in Alberta or Saskatchewan, ask the provincial apprenticeship office how industrial electrical work is certified there.

Where the trade is designated, each province and territory administers the exam and sets eligibility, fees and rewrite rules. See the Ontario Red Seal exam guide, British Columbia, Manitoba, Quebec or the guides by province, compare Red Seal exam fees by province, and read what happens if you fail the Red Seal exam before you book.

09How do you become a Red Seal industrial electrician in Ontario?

In Ontario the trade is Industrial Electrician (442A). Skilled Trades Ontario's 2025 trade report sets the apprenticeship at 7,950 hours of on-the-job training, approximately five years, plus 1,050 hours of technical training, seven months across four levels, with Grade 12 as the academic entry level. Passing the certifying exam, the Red Seal exam, earns the Certificate of Qualification. Skilled Trades Ontario issued 233 Industrial Electrician Certificates of Qualification in 2025. Experienced workers who did not complete an Ontario apprenticeship use its Trade Equivalency Assessment; see how to challenge the Red Seal exam.

The national standard recommends four levels of technical training and 7,200 total hours and notes that each jurisdiction implements this in its own way; Ontario's figures are the ones above.

10How hard is the Industrial Electrician Red Seal exam?

It is demanding in three ways. First, the reasoning: 40 to 50 per cent of the questions are critical thinking, which the preparation guide says can need more than one calculation, and the formula sheet leaves out voltage drop, impedance, slip and signal scaling. Second, the scope: utility services, protection and high-voltage systems, wiring and heating, motors and drives, fire alarm and networks, and PLCs and instrumentation, at the level of a journeyperson anywhere in Canada. If your plant is all automation or all power distribution, part of the exam is work you do not do every day. Third, the code: some questions need the Canadian Electrical Code, and a question will not tell you it is a code question.

The Red Seal Program publishes no pass rate, for this trade or any other, and it does not rank the trades by difficulty. The provincial figures we found, each counted a different way, are set out in how hard is the Red Seal exam. What the published breakdown does tell you is where the risk sits: blocks B, D and C are 64 of the 100 questions.

11How much does a Red Seal industrial electrician make?

For Ontario, Skilled Trades Ontario's 2025 trade report for Industrial Electrician (442A) gives an annual range of $78,000 to $98,000 and an hourly range of $40 to $50, from Workforce Planning Ontario's Labour Market Insights Report 2025. The report notes that its figures apply to the National Occupational Classification code 72201 and that other trades or occupations may be included, so they describe the occupation in Ontario, not Red Seal holders alone. Pay elsewhere in Canada is not covered by that report.

12How should you prepare?

Follow the weights. In order: B (23), D (21), C (20), F (17), E (10) and A (9). Blocks B, D and C together are 64 of 100 questions. The four largest tasks, I/O devices (8), motor starters and control devices (7), motors (6) and automated control systems (6), hold 27 of the 100.

You need 70 correct answers. A perfect score on B, D and C still leaves you 6 short, and a more realistic 48 of those 64 means you need 22 of the other 36. Give B, D and C about 60 per cent of your time, and do not skip the smaller blocks: process control alone is 17 questions, and E and A are 19 between them.

Rate yourself on each of the 30 tested tasks with the three levels in the Red Seal Self-Assessment Guide for Industrial Electrician and write down how many questions you expect to get right; a low rating on a large task is your first priority. Work the formula sheet until choosing the right formula is automatic, then practise what it leaves out: voltage drop, synchronous speed and slip, 4 to 20 mA scaling, and number systems for PLC addressing. Practise looking up rules and tables in the edition of the Canadian Electrical Code you will be given. There is no penalty for a wrong answer, so answer everything. For a full method, see how to study for the Red Seal exam.

Official links: the Industrial Electrician Red Seal Occupational Standard page, the 2021 standard as a PDF, the exam information page (the breakdown, the question mix with the three examples, the formula sheet and the acronym list) and the Self-Assessment Guide.

13Questions people ask

How many questions are on the 442A Industrial Electrician Red Seal exam?

The Industrial Electrician Red Seal exam (442A in Ontario) has 100 multiple-choice questions and a four-hour writing time, about 2 minutes 24 seconds per question. Each question has four options and one correct answer, and the pass mark is 70 per cent, which means 70 correct answers. You can miss 30 and still pass. The questions come from six blocks; the largest are generating, distribution and service systems with 23, motors, starters and drives with 21 and wiring systems with 20.

Is there a formula sheet on the Industrial Electrician Red Seal exam?

Yes. A formula sheet and an acronym list are provided at the sitting. The sheet gives the constants 1.41 (square root of 2), 1.73 (square root of 3) and 3.14 (pi) and formulas for Ohm's law and power, average, RMS and peak values, three-phase line and phase relationships, total power and volt-amperes, power factor, transformer turns ratio, short-circuit current from percent impedance, frequency from poles and speed, the area of a circle and force. It has no voltage drop, impedance, reactance, slip or 4 to 20 mA scaling formula.

Do you get a code book on the Industrial Electrician Red Seal exam?

The Red Seal Program's exam information page for the trade lists only a formula sheet and an acronym list and names no code edition, but its exam preparation guide lists code book information among reference material provided if required, and several of its sample questions need Canadian Electrical Code tables. Skilled Trades Ontario provides a code book if your exam needs one, and SkilledTradesBC states that the Canadian Electrical Code 2024 is provided for this exam from June 1, 2025. You cannot bring your own in either province.

What is the difference between the 442A and 309A Red Seal exams?

They are separate exams of 100 questions each. The 309A Construction Electrician exam puts 30 questions on wiring systems and has no process control block. The 442A Industrial Electrician exam puts 20 on wiring and 17 on process control (I/O devices, PLC, SCADA and DCS systems, and pneumatic and hydraulic controls), and its critical thinking share is 40 to 50 per cent against 20 to 30 per cent on the 309A.

Is Industrial Electrician a Red Seal trade in Alberta?

No. The Red Seal Program lists Industrial Electrician as a designated Red Seal trade in British Columbia, Manitoba, New Brunswick, Newfoundland and Labrador, Nova Scotia, the Northwest Territories, Ontario, Prince Edward Island, Quebec and Yukon. It is not designated Red Seal in Alberta, Saskatchewan or Nunavut, so the Industrial Electrician Red Seal exam is not offered there.

14Sources

• Red Seal Program: Industrial Electrician exam information: 100 questions, the question count for each major work activity and task, the question mix with one example of each question type, and the formula sheet and acronym list provided with the exam.
• Red Seal Program: Industrial Electrician trade page: the provinces and territories where the trade is designated Red Seal, the trade titles used in Quebec and the Northwest Territories, and the link to the official sample questions.
• Red Seal Program: description of the Industrial Electrician trade: where industrial electricians work and the occupations the standard names as overlapping.
• Red Seal Occupational Standard: Industrial Electrician (2021, PDF): the 6 major work activities, 31 tasks and 112 sub-tasks, common core status, the task descriptors and range of variables, and the harmonization recommendations.
• Red Seal Program: Industrial Electrician formula sheet (PDF): the abbreviations, the constants and the formulas provided with the exam.
• Red Seal Program: Industrial Electrician acronyms (PDF): the acronym list provided with the exam.
• Red Seal Exam Self-Assessment Guide: Industrial Electrician (PDF): the question count per major work activity and task, and the three-level self-rating used in the preparation section.
• Red Seal Program: Industrial Electrician sample questions: the published sample questions that need code tables.
• Red Seal Exam Preparation Guide: exam format, pass mark, writing time, question types, exam supplies, code books and exam room rules.
• SkilledTradesBC: Electrician, Industrial: the code book provided for the Red Seal exam in British Columbia (Canadian Electrical Code 2024 from June 1, 2025).
• Skilled Trades Ontario: Industrial Electrician: the Ontario trade page linked from Skilled Trades Ontario's 2025 Industrial Electrician (442A) trade report, which gives the trade name and code, the entry level, the hours, the certificates issued and the pay ranges.
• Skilled Trades Ontario: Trade Equivalency Assessment: the Ontario route for experienced workers who did not complete an Ontario apprenticeship.

The question counts were checked against the Red Seal Program's exam information page and Self-Assessment Guide for Industrial Electrician on October 3, 2026, and the task lists and range of variables come from the 2021 Red Seal Occupational Standard. The formula list was read from the Program's formula sheet. The provinces where the trade is a designated Red Seal trade come from the Program's trade page. The Ontario hours, certificate count and pay ranges come from Skilled Trades Ontario's 2025 trade report. The code book edition is SkilledTradesBC's statement for British Columbia; the Red Seal Program names none. If the Red Seal Program changes the breakdown, its page is the final word. If you find one of ours out of date, tell us.

Related: 442A Industrial Electrician practice exam · Free 442A Industrial Electrician practice questions · 309A Construction Electrician exam guide · Voltage drop calculator (CEC 3% and 5% limits) · Ohm's law and power calculator · Conduit fill calculator (EMT, rigid, PVC) · How many questions are on the Red Seal exam · Red Seal exam pass mark · Red Seal exam fees by province · All guides

15Practice for this exam

TicketPrep 442A practice tests are weighted to the breakdown above, block by block, and every answer is explained, all four options. You can try five sample questions with no account.

Ten free questions per trade, no account: free practice questions. How our questions are written and checked: how our questions are made.