Licensed Electrical Inspector (LEI) G Class Theory study plan
Licensed Electrical Inspector (LEI) G Class Theory · Give each week a clear focus.
8 weeks · About 6 hours per week
Wiring Methods, Materials, and Installation Standards & Electrical Theory, Circuits, and Calculations
Map every wiring method in the codebook to its permitted locations, then state the restriction aloud for each of at least 15 methods
Calculate conductor ampacity for 10 mixed scenarios applying adjustment and correction factors, showing each step
Build a one-page comparison table of raceway, cable, and busway systems with their securing and supporting rules
Your checkpoint
A 15-row wiring-method matrix plus 10 worked ampacity calculations, scored against answer keys with at least 80 percent correct
Wiring Methods, Materials, and Installation Standards & Electrical Codes, Regulations, and Permit Procedures
Trace the permit and inspection sequence for three project types from application through final approval
List the box fill, conductor bending radius, and support spacing limits you must verify on every rough-in
Identify which code editions and local amendments govern installations in your jurisdiction and cite where each is published
Your checkpoint
A one-page permit-to-final flowchart annotated with code citations, plus a 20-item rough-in verification checklist
Electrical Theory, Circuits, and Calculations & Grounding, Bonding, and Overcurrent Protection
Solve 25 circuit problems covering voltage drop, series-parallel resistance, and load balancing without reference notes
Explain the difference between grounded, grounding, and bonding conductors using a diagram you draw yourself
Size overcurrent devices for motors, transformers, and standard branch circuits, recording the article relied on for each
Your checkpoint
A 25-question self-test with worked solutions and a hand-drawn grounding-versus-bonding diagram that you can explain in under three minutes
Grounding, Bonding, and Overcurrent Protection & Inspection Procedures, Plan Review, and Documentation
Perform a simulated plan review of a small commercial service, logging every deficiency with a code citation
Verify grounding electrode system sizing and bonding jumper selection for three service configurations
Write inspection findings in neutral, citation-based language suitable for a correction notice
Your checkpoint
A complete mock plan-review report with at least 12 documented findings, each tied to a specific code section
Inspection Procedures, Plan Review, and Documentation & Electrical Codes, Regulations, and Permit Procedures
Sequence a full rough-in and final inspection, listing what to observe at each stage before touching anything
Draft a correction notice and a re-inspection record that would withstand appeal
Distinguish code violations from design preferences and document the basis for each call
Your checkpoint
A two-part inspection packet: one correction notice and one re-inspection record, peer-reviewed against a rubric you write
Safety, Hazard Identification, and Risk Assessment & Special Occupancies, Equipment, and Systems
Identify arc flash, shock, and confined-space hazards for five job-site scenarios and rank them by risk
State the clearance and protection requirements for hazardous locations and health-care occupancies
Select personal protective equipment and lockout steps appropriate to each scenario you ranked
Your checkpoint
A hazard register covering five scenarios with risk rankings, required controls, and the code or standard supporting each control
Professional Ethics, Liability, and Inspector Conduct & Inspection Procedures, Plan Review, and Documentation
Analyze four ethical dilemmas involving conflicts of interest, competence limits, and pressure to pass noncompliant work
Define the inspector's liability exposure and the documentation practices that limit it
Practice writing defensible conclusions that separate observed facts from professional judgment
Your checkpoint
Four written dilemma responses of 150 words each, plus a one-page personal documentation standard you will follow on the job
Electrical Theory, Circuits, and Calculations & Wiring Methods, Materials, and Installation Standards & Grounding, Bonding, and Overcurrent Protection & Electrical Codes, Regulations, and Permit Procedures & Inspection Procedures, Plan Review, and Documentation & Safety, Hazard Identification, and Risk Assessment & Special Occupancies, Equipment, and Systems & Professional Ethics, Liability, and Inspector Conduct
Complete two timed 100-question practice exams under exam conditions and score each by domain
Re-study only the domains scoring below 75 percent, using the weak-area log from prior weeks
Recite the ten code sections you most often misapplied from memory
Your checkpoint
Two scored practice exams with a domain-by-domain analysis and a final one-page summary of remaining weak areas
Milestones
Week 4: Score at least 75 percent on a 40-question mixed quiz covering domains 1, 2, 3, and 4, and submit the mock plan-review report with all findings cited
Week 6: Explain grounding and bonding, hazard controls, and special-occupancy requirements aloud in under ten minutes without notes, and confirm the hazard register is complete
Week 8: Achieve at least 80 percent overall on both timed practice exams with no single domain below 70 percent