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.

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.

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100+ Free SA Electrician Trade Test Practice Questions

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2026 Statistics

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 test your SA Electrician Trade Test exam readiness. 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 Practice Questions

Verified exam format metadata for South Africa Artisan Trade Test - Electrician (QCTO/NAMB) is pending. The practice questions above remain available while official exam length, timing, passing score, fee, and administrator details are reviewed.

100+ Free SA Electrician Trade Test Practice Questions

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Key Facts: SA Electrician Trade Test Exam

Sample SA Electrician Trade Test Practice Questions

About the SA Electrician Trade Test Practice Questions