100+ Free Licensed Electrical Inspector (LEI) G Class Theory Practice Questions

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2026 Statistics

Key Facts: Licensed Electrical Inspector (LEI) G Class Theory Exam

100

Practice Questions

OpenExamPrep

75%

Passing Score

Future Energy Skills / ESV

3.5 hrs

Exam Duration

Future Energy Skills / ESV

$360.00

Exam Fee (AUD)

Future Energy Skills 2026

Prepare for the Victoria LEI G Class Theory Exam with 100 high-quality practice questions covering Wiring Rules, cable selection calculations, legislation, and safety standards.

Sample Licensed Electrical Inspector (LEI) G Class Theory Practice Questions

Try these sample questions to test your Licensed Electrical Inspector (LEI) G Class Theory exam readiness. Each question includes a detailed explanation. Start the interactive quiz above for the full 100+ question experience with AI tutoring.

1Under the Victorian Electricity Safety Act 1998, if a Licensed Electrical Inspector (LEI) finds an electrical installation to be unsafe during an inspection, who must they notify?

A.The electrical contractor only

B.Energy Safe Victoria (ESV) only

C.The owner or occupier of the premises, the licensed electrical worker/contractor who did the work, and Energy Safe Victoria (ESV)

D.The local distribution network service provider (DNSP) only

Explanation: Under the Electricity Safety Act 1998, if an inspector finds an installation is unsafe, they must notify the owner/occupier, the licensed electrician who did the work (if known), and ESV. The inspector must also note on the certificate of inspection whether the work appears electrically unsafe, ensuring ESV and the responsible parties are made aware so rectifying action can begin.

2Under AS/NZS 4836:2023, when work near uninsulated low-voltage conductors cannot be avoided and de-energization is not practicable, what controls must be implemented?

A.No special controls are needed for low-voltage work

B.Safe approach distances must be maintained, barricades or barriers erected, and a safety observer used where required

C.Only licensed electricians may approach within 3 m of uninsulated LV conductors

D.The worker must wear standard PPE and proceed without additional controls

Explanation: AS/NZS 4836:2023 outlines safe working practices near low-voltage electrical installations. Where de-energization is not practicable, the standard requires maintaining safe approach distances, erecting barricades or barriers to restrict access, and using a safety observer where necessary to protect unqualified persons and workers from inadvertent contact with energized conductors.

3Under AS/NZS 3012:2019, what is the required frequency for the periodic inspection, testing, and tagging of portable electrical equipment on construction and demolition sites?

A.Every 6 months

B.Every 12 months

C.Every 3 months

D.Monthly

Explanation: AS/NZS 3012:2019 Clause 3.8.3 specifies that transportable structures, assembly enclosures, and portable electrical equipment (such as power tools and extension leads) used on construction sites must be inspected, tested, and tagged at intervals not exceeding 3 months. This high frequency accounts for the harsh physical environment on site.

4How is 'low voltage' defined in terms of AC limits under AS/NZS 3000:2018?

A.Exceeding 50 V AC but not exceeding 1000 V AC

B.Exceeding 32 V AC but not exceeding 500 V AC

C.Exceeding 12 V AC but not exceeding 250 V AC

D.Exceeding 120 V AC but not exceeding 415 V AC

Explanation: AS/NZS 3000:2018 Clause 1.4.29 defines low voltage as a voltage exceeding 50 V AC (or 120 V ripple-free DC) but not exceeding 1000 V AC (or 1500 V DC). Voltages below this range are classified as Extra-Low Voltage (ELV), and voltages above are classified as High Voltage (HV).

5Under Section 45 of the Victorian Electricity Safety Act 1998, within how many business days must a Licensed Electrical Inspector give the signed certificate of inspection to the person responsible for the work after completing an inspection?

A.Within 7 business days

B.Within 4 business days

C.Within 2 business days

D.On the same business day

Explanation: Section 45(3) of the Electricity Safety Act 1998 requires a Licensed Electrical Inspector to give a signed certificate of inspection to the person responsible for carrying out the work within 4 business days of completing the inspection. The responsible person must then lodge the certificate of electrical safety (which contains the certificate of inspection) with ESV.

6Under AS/NZS 3012:2019, which tag color is used on a construction site to indicate that equipment has been tested and is compliant for the summer quarter (December, January, and February)?

A.Blue

B.Green

C.Red

D.Yellow

Explanation: AS/NZS 3012:2019 Appendix F specifies the standard color coding for quarterly testing on construction sites. Red is used for the summer quarter (Dec/Jan/Feb), Green for autumn (Mar/Apr/May), Blue for winter (Jun/Jul/Aug), and Yellow for spring (Sep/Oct/Nov).

7According to AS/NZS 3000:2018, what is the minimum IP rating required for a switchboard installed in an outdoor location exposed to the weather?

A.IP2X

B.IP44

C.IPX4

D.IP56

Explanation: AS/NZS 3000:2018 Clause 2.10.2.2 requires switchboards installed in locations exposed to the weather to have a minimum degree of protection of IPX4. This ensures that water splashed against the enclosure from any direction has no harmful effect on the electrical components.

8According to AS/NZS 3000:2018, what is the minimum vertical clearance required between the cooking surface of an open-flame gas cooking appliance and a range hood?

A.600 mm

B.650 mm

C.750 mm

D.500 mm

Explanation: AS/NZS 3000:2018 Clause 4.10.2.1 and referencing gas installation standard AS/NZS 5601 require a minimum vertical clearance of 650 mm between the cooking surface of a gas appliance and a range hood, or 600 mm for an electric cooktop unless the manufacturer specifies otherwise.

9Using AS/NZS 3000:2018 Table 5.1, what is the minimum cross-sectional area of a copper main earthing conductor for an installation where the active consumer mains conductors are 16 mm² copper?

A.2.5 mm²

B.4 mm²

C.6 mm²

D.10 mm²

Explanation: According to AS/NZS 3000:2018 Table 5.1, for active conductors with a cross-sectional area of 16 mm² copper, the minimum size of the earthing conductor (main earth) is 6 mm² copper. This size ensures the mechanical strength and fault current carrying capacity of the earthing connection.

10Under AS/NZS 4836:2023, what is the mandatory sequence of actions required to prove isolation before commencing work on a low-voltage electrical circuit?

A.Turn off the circuit breaker, apply a warning tag, and begin work

B.Identify the circuit, isolate the circuit, lock out and tag the isolation device, and test the circuit using a proven voltmeter to verify it is de-energized

C.Ask the customer to confirm the power is off and test with a non-contact voltage tester

D.Disconnect the active conductor at the switchboard and tape it up

Explanation: AS/NZS 4836:2023 Clause 3.2 emphasizes that before starting work on low-voltage installations, you must identify, isolate, lock out, tag, and test to prove the circuit is de-energized. Proving dead must always involve testing with a reliable, verified voltmeter between all phases, neutral, and earth.

About the Licensed Electrical Inspector (LEI) G Class Theory Exam

The Victoria Licensed Electrical Inspector (LEI) G Class Theory Exam is the primary theoretical assessment required for electrical workers seeking registration as a 'G' (General) Class Licensed Electrical Inspector in Victoria. The exam tests a candidate's comprehensive knowledge of safety regulations, standards, and legislation. Key areas evaluated include: detailed interpretation of the AS/NZS 3000 Wiring Rules, cable selection and derating using AS/NZS 3008.1.1, installation testing and verification, construction site safety under AS/NZS 3012, safe working guidelines under AS/NZS 4836, and legal duties under the Victorian Electricity Safety Act 1998 and Electricity Safety (General) Regulations 2019.

Assessment

Written assessment (short-answer, standard-interpretation and calculation items) with reference materials — AS/NZS 3000, AS/NZS 3008.1.1, AS/NZS 3012, AS/NZS 4836 and Victorian electricity safety legislation — provided on-site by Future Energy Skills; candidate-supplied copies are not permitted. The separate G Class Practical (LEIPRAC) and Safe Approach (LEISAFEAPP) assessments are booked independently through ESV.

Time Limit

3.5 hours

Passing Score

75%

Exam Fee

$360.00 AUD (Future Energy Skills 2026 schedule) (Future Energy Skills / Energy Safe Victoria (ESV))

Licensed Electrical Inspector (LEI) G Class Theory Exam Content Outline

35%

Wiring Rules & AS/NZS 3000

Earthing systems (MEN), protective devices, switchboards, damp situations, isolation, and testing/verification requirements.

30%

Cable & Equipment Selection

Maximum demand calculations (single and three-phase), current-carrying capacity, derating factors (grouping, ambient temperature, depth of laying), voltage drop, and earth loop impedance limits (AS/NZS 3008.1.1).

20%

Construction & Specialty Installations

AS/NZS 3012 construction and demolition site switchboards, periodic inspection and testing timelines, generator setups, and special installations.

15%

Victorian Legislation & Safe LV Work

Electricity Safety Act 1998, Electricity Safety (General) Regulations 2019, duties of an inspector, defect reporting, Certificates of Electrical Safety (COES), and safe low-voltage work practices under AS/NZS 4836.

How to Pass the Licensed Electrical Inspector (LEI) G Class Theory Exam

What You Need to Know

Passing score: 75%
Assessment: Written assessment (short-answer, standard-interpretation and calculation items) with reference materials — AS/NZS 3000, AS/NZS 3008.1.1, AS/NZS 3012, AS/NZS 4836 and Victorian electricity safety legislation — provided on-site by Future Energy Skills; candidate-supplied copies are not permitted. The separate G Class Practical (LEIPRAC) and Safe Approach (LEISAFEAPP) assessments are booked independently through ESV.
Time limit: 3.5 hours
Exam fee: $360.00 AUD (Future Energy Skills 2026 schedule)

Keys to Passing

Complete 500+ practice questions
Score 80%+ consistently before scheduling
Focus on highest-weighted sections
Use our AI tutor for tough concepts

Licensed Electrical Inspector (LEI) G Class Theory Study Tips from Top Performers

1Master AS/NZS 3008.1.1 tables: Know how to navigate the standard's current-carrying capacity tables, derating-factor tables (grouping, ambient temperature, depth), and voltage-drop tables. Confirm table numbering against the current (2025) edition, which took effect in licensing assessments from 1 July 2026.

2Practice single-phase and three-phase maximum demand calculations using AS/NZS 3000 Appendix C. Ensure you know when to apply Table C1 and Table C2.

3Understand the legal responsibilities under the Electricity Safety Act 1998 for reporting unsafe installations and defects to ESV and the responsible person, and the certificate of inspection process under Section 45 for prescribed work.

4Memorize RCD testing trip time limits and construction site periodic inspection frequencies from AS/NZS 3012 (e.g., 3-monthly tag colors and testing intervals).

Frequently Asked Questions

What reference materials are available during the G Class Theory Exam?

Future Energy Skills provides copies of all required reference materials on-site — including AS/NZS 3000, AS/NZS 3008.1.1, AS/NZS 3012, AS/NZS 4836, the Electricity Safety Act 1998 and the Electricity Safety (General) Regulations 2019. Candidate-supplied copies are not permitted in the assessment.

What is the passing score for the LEI G Class Theory Exam?

A minimum score of 75% is required to pass the G Class Theory exam. Candidates must also pass the G Class Practical (LEI Practical) assessment separately to get licensed.

What happens if I fail the exam?

If you do not achieve the 75% passing grade, you must book a re-sit through Future Energy Skills or an approved Victorian assessment center and pay the applicable re-assessment fee.

What are the eligibility requirements to sit the LEI exam?

Candidates must hold a current Victorian Electrician's Licence ('A' Grade) and have relevant experience. It is highly recommended to complete an LEI preparation course before sitting the exam.