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Exam Review

Key Facts: Victoria LET Assessment Exam

100

Practice Questions

OpenExamPrep

2h 15m

Time (incl. reading)

Energy Safe Victoria

75%

Passing Score

Energy Safe Victoria

Open-book

Exam Format

Energy Safe Victoria

AS/NZS 3000:2018

Core Standard

Standards Australia

14 days

Retake Wait (41-74%)

Energy Safe Victoria

The Victoria Licensed Electrician Theory (LET) assessment is the written theory component of Energy Safe Victoria's Licensed Electrician's Assessment (LEA). It is an open-book exam lasting 2 hours 15 minutes including reading time, in which candidates may use AS/NZS 3000:2018, AS/NZS 3008.1.1, AS/NZS 3012:2019, AS/NZS 4836:2023 and the Electrical Safety Regulations 2019, and a result of 75% or higher is required to pass. Content spans the AS/NZS 3000 Wiring Rules, Victorian electrical safety law, cable selection and derating, the 5% voltage-drop limit and maximum demand, circuit protection (RCDs, breaking capacity and disconnection times), earthing and the MEN system, construction and demolition sites under AS/NZS 3012, and testing, verification and defect identification. This free prep includes 100 research-based practice questions with explanations and an AI tutor.

Sample Victoria LET Assessment Practice Questions

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

1Which standard is the primary 'Wiring Rules' document referenced throughout the Victorian Licensed Electrician's Theory (LET) assessment?
A.AS/NZS 3008.1.1:2017
B.AS/NZS 3000:2018
C.AS/NZS 3012:2019
D.AS/NZS 4836:2023
Explanation: AS/NZS 3000:2018 is the Australian/New Zealand Wiring Rules and is the core standard for the LET assessment. The other listed standards (cable selection, construction sites, low-voltage safe working) are supporting references permitted in the open-book exam.
2Under AS/NZS 3000:2018, what is the maximum permitted voltage drop, expressed as a percentage of the nominal supply voltage, between the point of supply and any point in an electrical installation?
A.2.5%
B.5%
C.7%
D.10%
Explanation: Clause 3.6.2 of AS/NZS 3000:2018 limits voltage drop to 5% of the nominal supply voltage measured from the point of supply to the point of utilisation. For a 230 V supply this equals about 11.5 V total across submains and final subcircuits combined.
3In the standard Australian MEN system of earthing, where is the neutral conductor connected to the earthing system?
A.At every socket outlet
B.At the main switchboard via the MEN link/connection
C.Only at the distribution transformer
D.At each final subcircuit
Explanation: In a Multiple Earthed Neutral (MEN) system the neutral bar is bonded to the earth bar at the main switchboard via the MEN connection (link), as required by Clause 5.3 of AS/NZS 3000:2018. This bond must occur at the main switchboard, not at sub-boards.
4Which Victorian regulation governs electrical installation safety, licensing of electrical work and certificates of electrical safety?
A.Electrical Safety Regulations 2019 (Vic)
B.Work Health and Safety Regulations 2017
C.AS/NZS 3000:2018
D.Electricity Industry Act 2000
Explanation: The Electricity Safety (General) Regulations 2019 made under the Electricity Safety Act 1998 (Vic) govern electrical installation safety, certificates of electrical safety and related requirements in Victoria, administered by Energy Safe Victoria. These regulations are a permitted LET reference.
5What is the maximum rated residual current of an RCD required to protect socket outlets up to 20 A in a domestic installation under AS/NZS 3000:2018?
A.10 mA
B.30 mA
C.100 mA
D.300 mA
Explanation: AS/NZS 3000:2018 Clause 2.6 requires socket outlets rated up to 20 A and final subcircuits supplying lighting in domestic installations to be protected by an RCD with a maximum rated residual current of 30 mA, providing protection against electric shock.
6On a construction site under AS/NZS 3012:2019, what is the maximum rated residual current of the RCD that must protect all final subcircuits supplying socket outlets and hand-held equipment?
A.30 mA
B.100 mA
C.300 mA
D.500 mA
Explanation: AS/NZS 3012:2019 requires all final subcircuits supplying socket outlets and portable/hand-held equipment on construction and demolition sites to be protected by a 30 mA RCD operating in all live conductors. This reflects the higher shock risk in these environments.
7When testing a new low-voltage installation, what is the minimum acceptable insulation resistance value under AS/NZS 3000:2018 when tested at 500 V DC?
A.0.5 MΩ
B.1 MΩ
C.2 MΩ
D.10 MΩ
Explanation: AS/NZS 3000:2018 Clause 8.3.6 requires a minimum insulation resistance of 1 MΩ when tested at 500 V DC between live conductors and earth. Values below this indicate moisture, damaged insulation or connected equipment and must be investigated.
8What is the nominal single-phase supply voltage used as the basis for calculations in AS/NZS 3000:2018?
A.110 V
B.220 V
C.230 V
D.240 V
Explanation: The nominal low-voltage single-phase supply in Australia is 230 V (400 V three-phase line-to-line) under AS 60038. AS/NZS 3000 calculations such as voltage drop use 230 V as the reference value, with the historic 240 V figure now superseded.
9Which formula correctly calculates the voltage drop in a single-phase circuit using AS/NZS 3008.1.1 mV/A/m values?
A.Vd = (mV/A/m × I × L) / 1000
B.Vd = (mV/A/m × I) / L
C.Vd = (I × L) / mV/A/m
D.Vd = mV/A/m × I × L × 1000
Explanation: Voltage drop in volts equals the cable's mV/A/m figure (from AS/NZS 3008.1.1 tables) multiplied by the design current (A) and the route length (m), divided by 1000 to convert millivolts to volts. The two-way effect is already built into the tabulated mV/A/m value.
10A single-phase circuit carries 25 A over a route length of 40 m using a cable with a tabulated value of 7.4 mV/A/m. What is the approximate voltage drop?
A.3.7 V
B.7.4 V
C.11.5 V
D.18.5 V
Explanation: Vd = (mV/A/m × I × L) / 1000 = (7.4 × 25 × 40) / 1000 = 7400 / 1000 = 7.4 V. As a percentage of 230 V this is about 3.2%, within the 5% allowance, so the cable is acceptable for voltage drop.

About the Victoria LET Assessment Exam

The Licensed Electrician's Theory (LET) assessment is the written theory component of Victoria's Licensed Electrician's Assessment, administered through Energy Safe Victoria. It is an open-book exam of 2 hours 15 minutes (including reading time) covering AS/NZS 3000:2018 Wiring Rules, the Victorian Electrical Safety Regulations 2019, cable selection, voltage drop, maximum demand, circuit protection, earthing and MEN, construction-site requirements and testing, and requires 75% to pass.

Exam sponsor: Energy Safe Victoria (Licensed Electrician's Assessment). The requirements and fees below concern the certification or admission exam, separate from our free practice resources.

Assessment

Open-book written theory exam over 2 hours 15 minutes (including reading time), referencing AS/NZS 3000:2018, AS/NZS 3008.1.1, AS/NZS 3012:2019, AS/NZS 4836:2023 and the Electrical Safety Regulations 2019, with 75% required to pass; this practice bank is 100 selected-response items

Time Limit

2 hours 15 minutes (including reading time)

Passing Score

75%

Exam / Certification Fees

Assessment fee varies by registered LEA assessment centre (typically a few hundred AUD per attempt)

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.

20%

AS/NZS 3000:2018 Wiring Rules

Voltage bands, conductor identification and colours, switchboards and isolation, IP ratings, bathroom and special-location zones, segregation and mechanical protection

12%

Victorian Electrical Safety Law

Electricity Safety Act and Regulations 2019, Energy Safe Victoria licensing, certificates of electrical safety, prescribed work and AS/NZS 4836 safe working

13%

Cable Selection & AS/NZS 3008

Current-carrying capacity, derating, installation methods, minimum conductor and neutral sizing, and cable/device coordination (Ib less than or equal to In less than or equal to Iz)

13%

Voltage Drop & Maximum Demand

5% voltage-drop limit, single and three-phase mV/A/m calculations, cumulative drop and Appendix C maximum demand with diversity

13%

Circuit Protection

RCDs, circuit-breaker trip curves and breaking capacity, disconnection times, selectivity, surge protection and automatic disconnection of supply

12%

Earthing Systems & MEN

MEN system and link, main earthing conductor sizing, earth electrodes, equipotential bonding and the adiabatic earth-fault check

8%

Construction & Demolition Sites (AS/NZS 3012)

30 mA RCD protection, marked isolating switches, inspection and test-and-tag intervals and connector colour coding

9%

Defect Identification & Testing/Verification

Mandatory test sequence, insulation resistance, earth continuity, polarity, RCD trip-time testing and identifying common installation defects

Preparing for the Victoria LET Assessment Exam

What You Need to Know

  • Passing score: 75%
  • Assessment: Open-book written theory exam over 2 hours 15 minutes (including reading time), referencing AS/NZS 3000:2018, AS/NZS 3008.1.1, AS/NZS 3012:2019, AS/NZS 4836:2023 and the Electrical Safety Regulations 2019, with 75% required to pass; this practice bank is 100 selected-response items
  • Time limit: 2 hours 15 minutes (including reading time)
  • Exam / certification fees: Assessment fee varies by registered LEA assessment centre (typically a few hundred AUD per attempt) 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

Victoria LET Assessment: Suggested Study Strategy

1Treat the LET as an open-book exam: tab and index AS/NZS 3000, 3008, 3012 and 4836 so you can find clauses fast under time pressure
2Memorise key values: 5% voltage drop, 30 mA and 300 mA RCDs, 0.4 s and 5 s disconnection times, and 1 MΩ insulation resistance at 500 V DC
3Practise cable selection end-to-end: current capacity with derating, then voltage drop, then coordination (Ib less than or equal to In less than or equal to Iz)
4Work Appendix C maximum demand examples until diversity factors and load groups are second nature
5Know the MEN system cold: one MEN link at the main switchboard and why downstream neutral-earth bonds are dangerous defects
6Complete all 100 practice questions and review every miss with the AI tutor before sitting the assessment

Frequently Asked Questions

How long is the Victoria LET assessment and what score do I need to pass?

The Licensed Electrician's Theory (LET) assessment runs for 2 hours 15 minutes including reading time and requires a result of 75% or higher to pass. It is the written theory component of Energy Safe Victoria's Licensed Electrician's Assessment.

Is the LET assessment open-book?

Yes. The LET is open-book, and candidates may use specified references including AS/NZS 3000:2018, AS/NZS 3008.1.1, AS/NZS 3012:2019, AS/NZS 4836:2023 and the Electrical Safety Regulations 2019. Knowing where information is located in each standard is key to finishing in time.

What topics does the Victoria LET assessment cover?

It covers the AS/NZS 3000:2018 Wiring Rules, Victorian electrical safety law, cable selection and AS/NZS 3008, voltage drop and maximum demand, circuit protection, earthing and the MEN system, construction and demolition sites under AS/NZS 3012, and testing, verification and defect identification.

What happens if I fail the LET assessment?

If you score at least 41% but below the 75% pass mark, you must wait 14 days before reattempting that assessment type. Use the time to review the standards and weak topic areas before booking a retake through an LEA assessment centre.

How is the Victoria LET different from the Queensland or NSW electrician exams?

The LET is administered by Energy Safe Victoria and assessed against the Victorian Electrical Safety Regulations 2019 and a 75% pass mark with a 2 hour 15 minute open-book format. While the core AS/NZS standards are national, the licensing framework, regulations and assessment rules are Victoria-specific.

Is this free Victoria LET practice as good as paid prep?

Our 100 practice questions cover the same AS/NZS standards and Victorian regulations as the LET, with a teaching explanation for every answer plus free daily AI tutor interactions. All content is free forever and updated for 2026.