PracticeVideosBlogFlashcardsEspañol
All Practice Exams

Free Practice Questions for SA Electrician Trade Test

Exam-style questions and explanations by OpenExamPrep.

✓ No registration✓ No credit card
100+ Questions
100% Free

Loading practice questions...

Same family resources

Explore More South Africa Artisan Trade Tests

Continue into nearby exams from the same family. Each card keeps practice questions, study guides, flashcards, videos, and articles in one place.

South Africa Artisan Trade Test — Boilermaker

Practice Questions

South Africa Artisan Trade Test — Bricklayer

Practice Questions

South Africa Artisan Trade Test — Carpenter

Practice Questions

South Africa Artisan Trade Test — Diesel Mechanic

Practice Questions

South Africa Artisan Trade Test — Fitter

Practice Questions

South Africa Artisan Trade Test — Instrument Mechanician

Practice Questions
Exam Review

Key Facts: SA Electrician Trade Test Exam

100

Practice Questions

OpenExamPrep

2 days

External Trade Test

QCTO/NAMB

SANS 10142-1

Wiring Code Tested

SABS

30 mA

Max Earth Leakage IDn

SANS 10142-1

3 years

Experience Required

QCTO/NAMB

Section 26D

Red Seal Route

DHET

The South Africa Electrician Artisan Trade Test is the QCTO/NAMB external summative assessment that qualifies a Red Seal electrician under Section 26D. It is a two-day practical and knowledge trade test delivered at accredited trade test centres, and candidates must be found competent in every assessed module rather than scoring a single percentage. Entry typically requires three years of relevant experience plus an N2 certificate with relevant trade-theory subjects (or an NQF Level 3 trade-theory route), and a compulsory ARPL pre-assessment. The underpinning theory covers electrical principles, the SANS 10142-1 Wiring of Premises code, earthing and earth leakage protection (30 mA), machines and transformers, instruments and measurement, fault-finding, and single- and three-phase systems. A candidate who fails a module gets two further attempts at 30-day intervals. This free prep includes 100 research-based practice questions with explanations and an AI tutor.

Sample SA Electrician Trade Test Practice Questions

Try these sample questions to review concepts for the SA Electrician Trade Test exam. Each question includes a detailed explanation. Start the interactive quiz above for the full 100+ question experience with AI tutoring.

1According to Ohm's law, what current flows through a 230 V single-phase circuit supplying a purely resistive load of 46 ohms?
A.0.2 A
B.5 A
C.10 A
D.0.5 A
Explanation: Ohm's law states I = V / R. With V = 230 V and R = 46 ohms, I = 230 / 46 = 5 A. The 230 V single-phase value is South Africa's standard nominal phase-to-neutral supply voltage under SANS standards.
2What is the power dissipated by a heating element that draws 10 A at 230 V?
A.23 W
B.230 W
C.2 300 W
D.2.3 W
Explanation: Power in a resistive circuit is P = V x I = 230 x 10 = 2 300 W (2.3 kW). This is the basis for sizing circuits and selecting conductor and protective-device ratings in N2 trade theory.
3Three resistors of 6 ohms each are connected in parallel. What is the total resistance of the combination?
A.18 ohms
B.6 ohms
C.2 ohms
D.3 ohms
Explanation: For equal resistors in parallel, total resistance = R / n = 6 / 3 = 2 ohms. Parallel resistance is always lower than the smallest individual resistor because the current has more paths.
4What does the term 'inductive reactance' (XL) in an AC circuit represent?
A.The opposition a capacitor offers to changing current
B.The opposition an inductor offers to alternating current, increasing with frequency
C.The DC resistance of a coil's copper winding
D.The power lost as heat in a resistor
Explanation: Inductive reactance XL = 2(pi)fL opposes alternating current and increases directly with frequency and inductance. Unlike resistance it stores and returns energy to the magnetic field rather than dissipating it as heat.
5In South Africa, what is the nominal frequency of the mains supply?
A.60 Hz
B.50 Hz
C.25 Hz
D.100 Hz
Explanation: The South African mains supply operates at a nominal 50 Hz, the standard across Europe, Africa and most of the world. Motor speed, transformer design and reactance calculations all depend on this 50 Hz value.
6What is the power factor of a purely resistive load such as an incandescent lamp or heating element?
A.0.8 lagging
B.Unity (1.0)
C.Zero
D.0.5 leading
Explanation: A purely resistive load has voltage and current in phase, so the power factor is unity (1.0) and all apparent power becomes real (working) power. Reactive loads such as motors lag, giving a power factor below unity.
7A single-phase motor draws 8 A at 230 V with a power factor of 0.75 lagging. What is the real (active) power consumed?
A.1 840 W
B.1 380 W
C.2 453 W
D.1 035 W
Explanation: Real power P = V x I x cos(phi) = 230 x 8 x 0.75 = 1 380 W. The power factor reduces the usable power below the apparent power of 1 840 VA because of the reactive component drawn by the motor windings.
8What is the relationship between line voltage and phase voltage in a balanced three-phase star (wye) connection?
A.Line voltage equals phase voltage
B.Line voltage is root-three times the phase voltage
C.Line voltage is half the phase voltage
D.Line voltage is three times the phase voltage
Explanation: In a star connection VL = root-three x Vph, so SA's 400 V line voltage gives 400 / 1.732 = 230 V phase voltage. The line and phase currents are equal in star.
9In a balanced three-phase delta (mesh) connection, how does line current relate to phase current?
A.Line current equals phase current
B.Line current is root-three times phase current
C.Line current is half phase current
D.Line current is three times phase current
Explanation: In delta, IL = root-three x Iph while line and phase voltages are equal. This is the mirror of star, where line and phase currents are equal but voltages differ by root-three.
10What is the formula for total power in a balanced three-phase system using line values?
A.P = VL x IL x cos(phi)
B.P = root-three x VL x IL x cos(phi)
C.P = VL x IL
D.P = 3 x VL x IL
Explanation: Three-phase real power is P = root-three x VL x IL x cos(phi), valid for both star and delta when line quantities are used. The root-three accounts for the phase relationship between the three line conductors.

About the SA Electrician Trade Test Exam

The South African Electrician Artisan Trade Test is the external summative assessment, administered through QCTO/NAMB-accredited trade test centres, that leads to qualification as a Red Seal electrician under Section 26D. It is a two-day practical and knowledge assessment built on N2 electrical trade theory and the SANS 10142-1 wiring code, and candidates must demonstrate competence in every assessed module.

Exam sponsor: Quality Council for Trades and Occupations (QCTO) / National Artisan Moderation Body (NAMB). The requirements and fees below concern the certification or admission exam, separate from our free practice resources.

Assessment

A two-day external summative trade test assessing practical and underpinning-knowledge modules to NAMB task standards; candidates must be found competent in every module. This practice bank is 100 selected-response trade-theory items.

Time Limit

Two-day external summative trade test

Passing Score

Competent in every assessed module

Exam / Certification Fees

Approximately R12 000 to R25 000+ at accredited trade test centres (varies)

Exam sponsor website

Fees, eligibility, and exam policies can change. Confirm them with the exam sponsor before applying or paying.

Our practice resources: topics covered

We aim to reflect publicly available exam outlines and topic information in our study resources. Coverage, format, and difficulty may differ from the actual exam, and we cannot guarantee that every detail is accurate or current. Confirm exam requirements, fees, and policies with the official exam sponsor.

22%

Electrical Principles & Theory

Ohm's law, series/parallel circuits, power and energy, AC theory, RMS and peak values, reactance, power factor and electromagnetic induction

17%

SANS 10142-1 Wiring Code

The Wiring of Premises low-voltage code: 230 V/400 V supply, conductor colours and sizing, voltage drop, dedicated circuits, distribution boards and the Certificate of Compliance

20%

Protection, Earthing & Safety

Earth leakage (30 mA), earthing and bonding, insulation resistance and bonding tests, overcurrent protection, breaking capacity, safe isolation, PPE and the OHS Act

16%

Machines & Transformers

Transformer principle, turns ratio and losses, induction motors, slip and synchronous speed, star-delta and DOL starting, contactors and overload relays

8%

Instruments & Measurement

Voltmeters, ammeters, clamp meters, wattmeters and megohmmeters; correct connection, safe isolation before testing and drawing interpretation

9%

Fault-Finding

Systematic diagnosis of open and short circuits, earth faults and nuisance tripping; motor and earth-leakage fault-finding and pre-energisation checks

8%

Single & Three-Phase Systems

Star and delta relationships, line/phase voltage and current, three-phase power, phase sequence, neutral current and load balancing

Preparing for the SA Electrician Trade Test Exam

What You Need to Know

  • Passing score: Competent in every assessed module
  • Assessment: A two-day external summative trade test assessing practical and underpinning-knowledge modules to NAMB task standards; candidates must be found competent in every module. This practice bank is 100 selected-response trade-theory items.
  • Time limit: Two-day external summative trade test
  • Exam / certification fees: Approximately R12 000 to R25 000+ at accredited trade test centres (varies) Official sources

Using Our Practice Resources

  • Work through all 100 available questions
  • Review every answer and explanation
  • Track weak areas and revisit them
  • Use our AI tutor for tough concepts

SA Electrician Trade Test: Suggested Study Strategy

1Anchor every wiring, earthing and protection answer in SANS 10142-1 - do not use BS 7671 or NEC values
2Memorise the key SANS test values: earth leakage IDn not exceeding 30 mA, bonding resistance not exceeding 0.2 ohm, and minimum insulation resistance of 1 megohm
3Know the South African voltages cold: 230 V single-phase, 400 V three-phase line, with phase = line divided by root-three
4Practise star and delta relationships and three-phase power (P = root-three x VL x IL x cos phi) until they are automatic
5Drill safe isolation (prove-test-prove) and the lock-out/tag-out procedure - safety questions are easy marks
6Complete all 100 practice questions and review every miss with the AI tutor before your trade test

Frequently Asked Questions

How is the South Africa electrician trade test structured and scored?

It is a two-day external summative trade test at a QCTO/NAMB-accredited centre, assessing practical tasks and underpinning knowledge by module. You must be found competent in every assessed module rather than reaching a single percentage score.

What are the entry requirements for the electrician trade test?

A common route is an N2 certificate with relevant trade-theory subjects plus three years of relevant experience; alternatively an NQF Level 3 trade-theory programme plus three years' experience. All candidates complete a compulsory Artisan Recognition of Prior Learning (ARPL) pre-assessment first.

Which wiring code is tested - SANS 10142-1, BS 7671 or the NEC?

South Africa uses SANS 10142-1, the Code of Practice for the Wiring of Premises (low-voltage installations). BS 7671 (UK) and the NEC (USA) do not apply, so all wiring, earthing and protection answers follow SANS 10142-1.

What happens if I fail a module on the trade test?

If you fail a module on the first attempt you are allowed two further attempts at intervals of at least 30 days. Your final Red Seal certificate is typically issued within about three months once all documentation is correctly submitted.

What does the trade theory cover?

It covers electrical principles and theory, the SANS 10142-1 wiring code, protection, earthing and safety, machines and transformers, instruments and measurement, fault-finding, and single- and three-phase systems - the same N2-level theory underpinning the practical tasks.

Is this free electrician trade test practice useful for the trade test?

Yes. Although the trade test is practical, it is built on N2 trade theory and SANS 10142-1, and our 100 questions cover that underpinning knowledge with a teaching explanation for every answer plus a free AI tutor. All content is free forever and updated for 2026.